DNSSEC Debugger

Domain Name:

Time: 2025-06-22 03:12:33 UTC

Analyzing DNSSEC problems for cuni.cz

DS=20326/SHA-256 is now in the chain-of-trust

	Checking DS between Trust Anchor and .
	`. IN DS ( 20326 8 2 e06d44b80b8f1d39a95c0b0d7c65d08458e880409bbc683457104237c7f8ec8d )`
	Query to c.root-servers.net for ./DNSKEY
	Received 1417 bytes from 192.33.4.12
	;; Response received from [192.33.4.12] 1417 octets ;; HEADER SECTION ;; id = 62252 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 5 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; . IN DNSKEY ;; ANSWER SECTION (5 records) . 172800 IN DNSKEY ( 256 3 8 AwEAAbEbGCpGTDrcZTWqWWE72nphyshpRcILdzCVlBGU9Ln1Fui9kkseUOP+g5GLUeVFKdTloeRT A9+EYiQdXgWXmXmuW/nGxZjAikluF/O9NzLVrr5iZnth2xu+F48nrJlAgWWiMNau54NI5sZ3iVQf hFsq2pZmf43RauRPniYMShOLO7EBWWXr5glDSgZGS9fSm6xHwwF+g8D4m8oanjvdCBNxXzSEKS31 ibxjLifTfvwCg3y4XXcNW9U6Nu3JmoKUdxqpPPIkBvVQbIz4UO2FwaR13uXC03ALP1Yx2QNSS4SZ lcIMtAftQR9wtCiuPWQnFv4jkzWqlhp1Lmf7bcoL9yk= ) ; keytag 53148 . 172800 IN DNSKEY ( 257 3 8 AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3+/4RgWOq7HrxRixHlFlE xOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kvArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgC mr3EgVLrjyBxWezF0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+eoZG+ SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfdRUfhHdY6+cn8HFRm+2hM8AnX GXws9555KrUB5qihylGa8subX2Nn6UwNR1AkUTV74bU= ) ; keytag 20326 . 172800 IN DNSKEY ( 256 3 8 AwEAAbauxLSFZ+KSWi2cT6TJbm3d+GIVqb2N1XnDjMsRme0b6JlGp/cvwmM5CaJ5LQ7tG1r7LuTH jYZadtbNk2nZmclq9r4KInS48ungoAZb0gJXVw8IvBTBb1YWQmiBqD285pJuORwTii7DF++nNJJk 3i55HJt9SmBI7m7t8nvx7OOY/w0inxg3fLH2uY0SKO8he4FGwMc4Ubiab8N8Yhyhh+FkKKdD/+oA cuGF75PjlSXO460B4MlNLlEcjDEzIsKauRYx4YVgSaNomGhMMFblmXRzgW+1R6ywvm5mC9+omlyy izZp2GJfPwGMezuKSGDndO6CYYEc5/lsRhvBYsGjdPM= ) ; keytag 46441 . 172800 IN DNSKEY ( 257 3 8 AwEAAa96jeuknZlaeSrvyAJj6ZHv28hhOKkx3rLGXVaC6rXTsDc449/cidltpkyGwCJNnOAlFNKF 2jBosZBU5eeHspaQWOmOElZsjICMQMC3aeHbGiShvZsx4wMYSjH8e7Vrhbu6irwCzVBApESjbUdp WWmEnhathWu1jo+siFUiRAAxm9qyJNg/wOZqqzL/dL/q8PkcRU5oUKEpUge71M3ej2/7CPqpdVwu MoTvoB+ZOT4YeGyxMvHmbrxlFzGOHOijtzN+u1TQNatX2XBuzZNQ1K+s2CXkPIZo7s6JgZyvaBev YtxPvYLw4z9mR7K2vaF18UYH9Z9GNUUeayffKC73PYc= ) ; keytag 38696 . 172800 IN RRSIG ( DNSKEY 8 0 172800 20250711000000 20250620000000 20326 . S0XHgtn2OkSZ0ZOGtgOM4Xipyq/72x7vHPJy3SV8p7TUCtMNj2XxEPjZoXSYvxbkhtaeI6E+9dvv QrqrB6ovKdW8DE/o88jFBLsfe9niPDHgZAs0ZpfGAtRfdFrXvtXZ4CCTYCSsxnaIMNS7By4+Ti1V 9QFp/+ml0VjzVkc92SvmFJMYYpORmeq97VQMOdUJwEYhKx6Npw8cdSVxjqtytx/iNgB6KRt6i6j3 dASECBA8hSxMesKFbnVwLW8lxObBiTnsQo1WDw2IO8vMBSNGagFUUA2YTzvEwYPOQskebK3C0LAW 2GzOvoy69fIK0a9RqKkO9scvKVtLDdrEEDLBZA== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 4 DNSKEY records for .
	`. 172800 IN DNSKEY ( 256 3 8 AwEAAbEbGCpGTDrcZTWqWWE72nphyshpRcILdzCVlBGU9Ln1Fui9kkseUOP+g5GLUeVFKdTloeRT A9+EYiQdXgWXmXmuW/nGxZjAikluF/O9NzLVrr5iZnth2xu+F48nrJlAgWWiMNau54NI5sZ3iVQf hFsq2pZmf43RauRPniYMShOLO7EBWWXr5glDSgZGS9fSm6xHwwF+g8D4m8oanjvdCBNxXzSEKS31 ibxjLifTfvwCg3y4XXcNW9U6Nu3JmoKUdxqpPPIkBvVQbIz4UO2FwaR13uXC03ALP1Yx2QNSS4SZ lcIMtAftQR9wtCiuPWQnFv4jkzWqlhp1Lmf7bcoL9yk= ) ; keytag 53148`
	`. 172800 IN DNSKEY ( 257 3 8 AwEAAaz/tAm8yTn4Mfeh5eyI96WSVexTBAvkMgJzkKTOiW1vkIbzxeF3+/4RgWOq7HrxRixHlFlE xOLAJr5emLvN7SWXgnLh4+B5xQlNVz8Og8kvArMtNROxVQuCaSnIDdD5LKyWbRd2n9WGe2R8PzgC mr3EgVLrjyBxWezF0jLHwVN8efS3rCj/EWgvIWgb9tarpVUDK/b58Da+sqqls3eNbuv7pr+eoZG+ SrDK6nWeL3c6H5Apxz7LjVc1uTIdsIXxuOLYA4/ilBmSVIzuDWfdRUfhHdY6+cn8HFRm+2hM8AnX GXws9555KrUB5qihylGa8subX2Nn6UwNR1AkUTV74bU= ) ; keytag 20326`
	`. 172800 IN DNSKEY ( 256 3 8 AwEAAbauxLSFZ+KSWi2cT6TJbm3d+GIVqb2N1XnDjMsRme0b6JlGp/cvwmM5CaJ5LQ7tG1r7LuTH jYZadtbNk2nZmclq9r4KInS48ungoAZb0gJXVw8IvBTBb1YWQmiBqD285pJuORwTii7DF++nNJJk 3i55HJt9SmBI7m7t8nvx7OOY/w0inxg3fLH2uY0SKO8he4FGwMc4Ubiab8N8Yhyhh+FkKKdD/+oA cuGF75PjlSXO460B4MlNLlEcjDEzIsKauRYx4YVgSaNomGhMMFblmXRzgW+1R6ywvm5mC9+omlyy izZp2GJfPwGMezuKSGDndO6CYYEc5/lsRhvBYsGjdPM= ) ; keytag 46441`
	`. 172800 IN DNSKEY ( 257 3 8 AwEAAa96jeuknZlaeSrvyAJj6ZHv28hhOKkx3rLGXVaC6rXTsDc449/cidltpkyGwCJNnOAlFNKF 2jBosZBU5eeHspaQWOmOElZsjICMQMC3aeHbGiShvZsx4wMYSjH8e7Vrhbu6irwCzVBApESjbUdp WWmEnhathWu1jo+siFUiRAAxm9qyJNg/wOZqqzL/dL/q8PkcRU5oUKEpUge71M3ej2/7CPqpdVwu MoTvoB+ZOT4YeGyxMvHmbrxlFzGOHOijtzN+u1TQNatX2XBuzZNQ1K+s2CXkPIZo7s6JgZyvaBev YtxPvYLw4z9mR7K2vaF18UYH9Z9GNUUeayffKC73PYc= ) ; keytag 38696`
	DNSKEY=20326/SEP is now in the chain-of-trust
	DS=20326/SHA-256 verifies DNSKEY=20326/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`. 172800 IN RRSIG ( DNSKEY 8 0 172800 20250711000000 20250620000000 20326 . S0XHgtn2OkSZ0ZOGtgOM4Xipyq/72x7vHPJy3SV8p7TUCtMNj2XxEPjZoXSYvxbkhtaeI6E+9dvv QrqrB6ovKdW8DE/o88jFBLsfe9niPDHgZAs0ZpfGAtRfdFrXvtXZ4CCTYCSsxnaIMNS7By4+Ti1V 9QFp/+ml0VjzVkc92SvmFJMYYpORmeq97VQMOdUJwEYhKx6Npw8cdSVxjqtytx/iNgB6KRt6i6j3 dASECBA8hSxMesKFbnVwLW8lxObBiTnsQo1WDw2IO8vMBSNGagFUUA2YTzvEwYPOQskebK3C0LAW 2GzOvoy69fIK0a9RqKkO9scvKVtLDdrEEDLBZA== )`
	RRSIG=20326 and DNSKEY=20326/SEP verifies the DNSKEY RRset
	DNSKEY=53148 is now in the chain-of-trust
	DNSKEY=46441 is now in the chain-of-trust
	DNSKEY=38696/SEP is now in the chain-of-trust
	Query to k.root-servers.net for cuni.cz/A
	Received 618 bytes from 193.0.14.129
	;; Response received from [193.0.14.129] 618 octets ;; HEADER SECTION ;; id = 44823 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 0 ;; nscount = 6 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN A ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (6 records) cz. 172800 IN NS a.ns.nic.cz. cz. 172800 IN NS b.ns.nic.cz. cz. 172800 IN NS c.ns.nic.cz. cz. 172800 IN NS d.ns.nic.cz. cz. 86400 IN DS ( 20237 13 2 cff0f3ecdbc529c1f0031ba1840bfb835853b9209ed1e508fff48451d7b778e2 ) cz. 86400 IN RRSIG ( DS 8 1 86400 20250704170000 20250621160000 53148 . qnU41AGxov/WMn/SH+ViI/Fm4NZTIOm5IWavvT7hQO6jr4VkfZBDue0skDqWYd5GmXWaxR/KZ1eW bubdZYjuuvaUnMaqJH1dQbabEbhDZwt20e4ZHDbva8IW1+sHUUZE3pzS3C5BYkkFQTe3fCCrm9bx tDvV8sO8xozDp5aCH2bhDcswPzX+ngr+cpDdyFXTl5ZEzQCdsfM66cPp3QbWrPaaEbzPwewadwap 4Rz9Xs24dhTGI/tFVhkw1KRgDJV5EWoa7KymvJH4lXXBd2FtTjRUZNP5381njw72qG4ZvH8r7a2o WAxtrLBVJuBoYF1zUl3EPZLbazeIEyQN9eOUAQ== ) ;; ADDITIONAL SECTION (9 records) a.ns.nic.cz. 172800 IN A 194.0.12.1 b.ns.nic.cz. 172800 IN A 194.0.13.1 c.ns.nic.cz. 172800 IN A 194.0.14.1 d.ns.nic.cz. 172800 IN A 193.29.206.1 a.ns.nic.cz. 172800 IN AAAA 2001:678:f::1 b.ns.nic.cz. 172800 IN AAAA 2001:678:10::1 c.ns.nic.cz. 172800 IN AAAA 2001:678:11::1 d.ns.nic.cz. 172800 IN AAAA 2001:678:1::1 ;; { "EDNS-VERSION": 0 }
	Query to b.root-servers.net for cz/DNSKEY
	Received 613 bytes from 170.247.170.2
	;; Response received from [170.247.170.2] 613 octets ;; HEADER SECTION ;; id = 56017 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 0 ;; nscount = 6 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cz. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (6 records) cz. 172800 IN NS a.ns.nic.cz. cz. 172800 IN NS b.ns.nic.cz. cz. 172800 IN NS c.ns.nic.cz. cz. 172800 IN NS d.ns.nic.cz. cz. 86400 IN DS ( 20237 13 2 cff0f3ecdbc529c1f0031ba1840bfb835853b9209ed1e508fff48451d7b778e2 ) cz. 86400 IN RRSIG ( DS 8 1 86400 20250704170000 20250621160000 53148 . qnU41AGxov/WMn/SH+ViI/Fm4NZTIOm5IWavvT7hQO6jr4VkfZBDue0skDqWYd5GmXWaxR/KZ1eW bubdZYjuuvaUnMaqJH1dQbabEbhDZwt20e4ZHDbva8IW1+sHUUZE3pzS3C5BYkkFQTe3fCCrm9bx tDvV8sO8xozDp5aCH2bhDcswPzX+ngr+cpDdyFXTl5ZEzQCdsfM66cPp3QbWrPaaEbzPwewadwap 4Rz9Xs24dhTGI/tFVhkw1KRgDJV5EWoa7KymvJH4lXXBd2FtTjRUZNP5381njw72qG4ZvH8r7a2o WAxtrLBVJuBoYF1zUl3EPZLbazeIEyQN9eOUAQ== ) ;; ADDITIONAL SECTION (9 records) a.ns.nic.cz. 172800 IN A 194.0.12.1 a.ns.nic.cz. 172800 IN AAAA 2001:678:f::1 b.ns.nic.cz. 172800 IN A 194.0.13.1 b.ns.nic.cz. 172800 IN AAAA 2001:678:10::1 c.ns.nic.cz. 172800 IN A 194.0.14.1 c.ns.nic.cz. 172800 IN AAAA 2001:678:11::1 d.ns.nic.cz. 172800 IN A 193.29.206.1 d.ns.nic.cz. 172800 IN AAAA 2001:678:1::1 ;; { "EDNS-VERSION": 0 }
	Found child zone cz

	Checking DS between . and cz
	Query to j.root-servers.net for cz/DS
	Received 366 bytes from 192.58.128.30
	;; Response received from [192.58.128.30] 366 octets ;; HEADER SECTION ;; id = 32646 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1472, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cz. IN DS ;; ANSWER SECTION (2 records) cz. 86400 IN DS ( 20237 13 2 cff0f3ecdbc529c1f0031ba1840bfb835853b9209ed1e508fff48451d7b778e2 ) cz. 86400 IN RRSIG ( DS 8 1 86400 20250704170000 20250621160000 53148 . qnU41AGxov/WMn/SH+ViI/Fm4NZTIOm5IWavvT7hQO6jr4VkfZBDue0skDqWYd5GmXWaxR/KZ1eW bubdZYjuuvaUnMaqJH1dQbabEbhDZwt20e4ZHDbva8IW1+sHUUZE3pzS3C5BYkkFQTe3fCCrm9bx tDvV8sO8xozDp5aCH2bhDcswPzX+ngr+cpDdyFXTl5ZEzQCdsfM66cPp3QbWrPaaEbzPwewadwap 4Rz9Xs24dhTGI/tFVhkw1KRgDJV5EWoa7KymvJH4lXXBd2FtTjRUZNP5381njw72qG4ZvH8r7a2o WAxtrLBVJuBoYF1zUl3EPZLbazeIEyQN9eOUAQ== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 1 DS records for cz in the . zone
	DS=20237/SHA-256 has algorithm ECDSAP256SHA256
	Found 1 RRSIGs over DS RRset
	`cz. 86400 IN RRSIG ( DS 8 1 86400 20250704170000 20250621160000 53148 . qnU41AGxov/WMn/SH+ViI/Fm4NZTIOm5IWavvT7hQO6jr4VkfZBDue0skDqWYd5GmXWaxR/KZ1eW bubdZYjuuvaUnMaqJH1dQbabEbhDZwt20e4ZHDbva8IW1+sHUUZE3pzS3C5BYkkFQTe3fCCrm9bx tDvV8sO8xozDp5aCH2bhDcswPzX+ngr+cpDdyFXTl5ZEzQCdsfM66cPp3QbWrPaaEbzPwewadwap 4Rz9Xs24dhTGI/tFVhkw1KRgDJV5EWoa7KymvJH4lXXBd2FtTjRUZNP5381njw72qG4ZvH8r7a2o WAxtrLBVJuBoYF1zUl3EPZLbazeIEyQN9eOUAQ== )`
	RRSIG=53148 and DNSKEY=53148 verifies the DS RRset
	DS=20237/SHA-256 is now in the chain-of-trust
	`cz. 86400 IN DS ( 20237 13 2 cff0f3ecdbc529c1f0031ba1840bfb835853b9209ed1e508fff48451d7b778e2 )`
	Query to c.ns.nic.cz for cz/DNSKEY
	Received 289 bytes from 194.0.14.1
	;; Response received from [194.0.14.1] 289 octets ;; HEADER SECTION ;; id = 4199 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 3 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cz. IN DNSKEY ;; ANSWER SECTION (3 records) cz. 3600 IN DNSKEY ( 256 3 13 6EJ39mewFkVA0SRDq0EtbTlnmBFIGK85z0bbugoWBK3wIJKgqjfVQ7Y/pcbzHGFLX/TjrluwBPA/ 3s4axWHM4w== ) ; keytag 39356 cz. 3600 IN DNSKEY ( 257 3 13 nqzH7xP1QU5UOVy/VvxFSlrB/XgX9JDJzj51PzIj35TXjZTyalTlAT/f7PAfaSD5mEG1N8Vk9NmI 2nxgQqhzDQ== ) ; keytag 20237 cz. 3600 IN RRSIG ( DNSKEY 13 1 3600 20250705083323 20250621070323 20237 cz. 8xtV85/Nf3NgArJrwUoY28viHeWB8cRKFx/Mlt4F/ZWK6HbC1spMJmXL5wlo4QZ9HU3cBeZ7f2lx vbavV23JTg== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 2 DNSKEY records for cz
	`cz. 3600 IN DNSKEY ( 256 3 13 6EJ39mewFkVA0SRDq0EtbTlnmBFIGK85z0bbugoWBK3wIJKgqjfVQ7Y/pcbzHGFLX/TjrluwBPA/ 3s4axWHM4w== ) ; keytag 39356`
	`cz. 3600 IN DNSKEY ( 257 3 13 nqzH7xP1QU5UOVy/VvxFSlrB/XgX9JDJzj51PzIj35TXjZTyalTlAT/f7PAfaSD5mEG1N8Vk9NmI 2nxgQqhzDQ== ) ; keytag 20237`
	DNSKEY=20237/SEP is now in the chain-of-trust
	DS=20237/SHA-256 verifies DNSKEY=20237/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`cz. 3600 IN RRSIG ( DNSKEY 13 1 3600 20250705083323 20250621070323 20237 cz. 8xtV85/Nf3NgArJrwUoY28viHeWB8cRKFx/Mlt4F/ZWK6HbC1spMJmXL5wlo4QZ9HU3cBeZ7f2lx vbavV23JTg== )`
	RRSIG=20237 and DNSKEY=20237/SEP verifies the DNSKEY RRset
	DNSKEY=39356 is now in the chain-of-trust
	Query to d.ns.nic.cz for cuni.cz/A
	Received 410 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 410 octets ;; HEADER SECTION ;; id = 411 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 0 ;; nscount = 6 arcount = 7 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN A ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (6 records) cuni.cz. 3600 IN NS golias.ruk.cuni.cz. cuni.cz. 3600 IN NS cuce.ruk.cuni.cz. cuni.cz. 3600 IN NS nsa.ces.net. cuni.cz. 3600 IN NS david.ruk.cuni.cz. cuni.cz. 3600 IN DS ( 43474 13 2 f030314d575105b12fa185aa8572386b6a54a9c8a238736320c3628038dfe20c ) cuni.cz. 3600 IN RRSIG ( DS 13 2 3600 20250628014656 20250614001656 39356 cz. ib62Ij40gNESLFvNITgquS6S36eTHa/grjhlZFCS+xh6l+hYigrilMXfbB8bVCveXNi6T8KJHF2y jQgbXu0tNQ== ) ;; ADDITIONAL SECTION (7 records) golias.ruk.cuni.cz. 3600 IN A 195.113.0.2 david.ruk.cuni.cz. 3600 IN A 78.128.213.242 cuce.ruk.cuni.cz. 3600 IN A 195.113.0.8 golias.ruk.cuni.cz. 3600 IN AAAA 2001:718:1e03:1::2 david.ruk.cuni.cz. 3600 IN AAAA 2001:718:1203:502::2 cuce.ruk.cuni.cz. 3600 IN AAAA 2001:718:1e03:1::8 ;; { "EDNS-VERSION": 0 }
	Query to d.ns.nic.cz for cuni.cz/DNSKEY
	Received 410 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 410 octets ;; HEADER SECTION ;; id = 34944 ;; qr = 1 aa = 0 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 0 ;; nscount = 6 arcount = 7 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (6 records) cuni.cz. 3600 IN NS nsa.ces.net. cuni.cz. 3600 IN NS cuce.ruk.cuni.cz. cuni.cz. 3600 IN NS david.ruk.cuni.cz. cuni.cz. 3600 IN NS golias.ruk.cuni.cz. cuni.cz. 3600 IN DS ( 43474 13 2 f030314d575105b12fa185aa8572386b6a54a9c8a238736320c3628038dfe20c ) cuni.cz. 3600 IN RRSIG ( DS 13 2 3600 20250628014656 20250614001656 39356 cz. ib62Ij40gNESLFvNITgquS6S36eTHa/grjhlZFCS+xh6l+hYigrilMXfbB8bVCveXNi6T8KJHF2y jQgbXu0tNQ== ) ;; ADDITIONAL SECTION (7 records) golias.ruk.cuni.cz. 3600 IN A 195.113.0.2 david.ruk.cuni.cz. 3600 IN A 78.128.213.242 cuce.ruk.cuni.cz. 3600 IN A 195.113.0.8 golias.ruk.cuni.cz. 3600 IN AAAA 2001:718:1e03:1::2 david.ruk.cuni.cz. 3600 IN AAAA 2001:718:1203:502::2 cuce.ruk.cuni.cz. 3600 IN AAAA 2001:718:1e03:1::8 ;; { "EDNS-VERSION": 0 }
	Found child zone cuni.cz

cuni.cz

	Checking DS between cz and cuni.cz
	Query to a.ns.nic.cz for cuni.cz/DS
	Received 182 bytes from 194.0.12.1
	;; Response received from [194.0.12.1] 182 octets ;; HEADER SECTION ;; id = 1238 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN DS ;; ANSWER SECTION (2 records) cuni.cz. 3600 IN DS ( 43474 13 2 f030314d575105b12fa185aa8572386b6a54a9c8a238736320c3628038dfe20c ) cuni.cz. 3600 IN RRSIG ( DS 13 2 3600 20250628014656 20250614001656 39356 cz. ib62Ij40gNESLFvNITgquS6S36eTHa/grjhlZFCS+xh6l+hYigrilMXfbB8bVCveXNi6T8KJHF2y jQgbXu0tNQ== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 1 DS records for cuni.cz in the cz zone
	DS=43474/SHA-256 has algorithm ECDSAP256SHA256
	Found 1 RRSIGs over DS RRset
	`cuni.cz. 3600 IN RRSIG ( DS 13 2 3600 20250628014656 20250614001656 39356 cz. ib62Ij40gNESLFvNITgquS6S36eTHa/grjhlZFCS+xh6l+hYigrilMXfbB8bVCveXNi6T8KJHF2y jQgbXu0tNQ== )`
	RRSIG=39356 and DNSKEY=39356 verifies the DS RRset
	DS=43474/SHA-256 is now in the chain-of-trust
	`cuni.cz. 3600 IN DS ( 43474 13 2 f030314d575105b12fa185aa8572386b6a54a9c8a238736320c3628038dfe20c )`
	Query to nsa.ces.net for cuni.cz/DNSKEY
	Received 219 bytes from 195.113.144.205
	;; Response received from [195.113.144.205] 219 octets ;; HEADER SECTION ;; id = 29378 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1472, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN DNSKEY ;; ANSWER SECTION (2 records) cuni.cz. 3600 IN DNSKEY ( 257 3 13 CRfC63IEp1cb9ALSIHYAFosTvel5Pr7I0KRXgcNMw9JbBO0mba2hBtB+82IdFwOa48PnBNoMl3rZ ohtZLxy07g== ) ; keytag 43474 cuni.cz. 3600 IN RRSIG ( DNSKEY 13 2 3600 20250702045113 20250618042138 43474 cuni.cz. gux6WEn/4lXx+KotKm+It1ajVWbsNdr8l6LjLV/mltavpuC71fi8/SEV51OiJov1uAn5xa0n95ge jXbNKbXMJw== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 1 DNSKEY records for cuni.cz
	`cuni.cz. 3600 IN DNSKEY ( 257 3 13 CRfC63IEp1cb9ALSIHYAFosTvel5Pr7I0KRXgcNMw9JbBO0mba2hBtB+82IdFwOa48PnBNoMl3rZ ohtZLxy07g== ) ; keytag 43474`
	DNSKEY=43474/SEP is now in the chain-of-trust
	DS=43474/SHA-256 verifies DNSKEY=43474/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`cuni.cz. 3600 IN RRSIG ( DNSKEY 13 2 3600 20250702045113 20250618042138 43474 cuni.cz. gux6WEn/4lXx+KotKm+It1ajVWbsNdr8l6LjLV/mltavpuC71fi8/SEV51OiJov1uAn5xa0n95ge jXbNKbXMJw== )`
	RRSIG=43474 and DNSKEY=43474/SEP verifies the DNSKEY RRset
	Query to david.ruk.cuni.cz for cuni.cz/A
	Received 353 bytes from 78.128.213.242
	;; Response received from [78.128.213.242] 353 octets ;; HEADER SECTION ;; id = 3393 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 5 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ;; {"EXTENDED-ERROR": {"ERROR": "Prohibited", "EXTRA-TEXT": "", "INFO-CODE": 18}} ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN A ;; ANSWER SECTION (2 records) cuni.cz. 86400 IN A 195.113.89.35 cuni.cz. 86400 IN RRSIG ( A 13 2 86400 20250701122912 20250617115610 43474 cuni.cz. dmZp69D0uoHUU0QA2NawfFJW4rZbFj5wJU5AIX92AlinCqDsfQBPvabYge77/h/XDpgqn7+kicOf VGDP10kglA== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS nsa.ces.net. cuni.cz. 86400 IN NS cuce.ruk.cuni.cz. cuni.cz. 86400 IN NS david.ruk.cuni.cz. cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN RRSIG ( NS 13 2 86400 20250701124619 20250617120335 43474 cuni.cz. kGuXrri1r5IMz/HfKQfKlhRd9JdewsZpG+yAdIPrUhEDXdmhp3ZQgKHcW8RLBAphvjmDfZufYWtr PxS1qIN9EQ== ) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	david.ruk.cuni.cz is authoritative for cuni.cz
	Found RRSIG signed by cuni.cz zone
	Query to golias.ruk.cuni.cz for cuni.cz/SOA
	Received 390 bytes from 195.113.0.2
	;; Response received from [195.113.0.2] 390 octets ;; HEADER SECTION ;; id = 1836 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 5 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ;; {"EXTENDED-ERROR": {"ERROR": "Prohibited", "EXTRA-TEXT": "", "INFO-CODE": 18}} ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN SOA ;; ANSWER SECTION (2 records) cuni.cz. 86400 IN SOA ( golias.ruk.cuni.cz. postmaster.dec59.ruk.cuni.cz. 2025061845 ;serial 28800 ;refresh 7200 ;retry 1209600 ;expire 600 ;minimum ) cuni.cz. 86400 IN RRSIG ( SOA 13 2 86400 20250705222420 20250621212420 43474 cuni.cz. eIa8oMF8SgpkaGJPE9rAPqIRxLjHbb27Z+wXJYOtgX1iKEJPc9Eqd+XqBtoUr55LNQC9tjjfEYST /Ea8GpHq3A== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS cuce.ruk.cuni.cz. cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN NS nsa.ces.net. cuni.cz. 86400 IN NS david.ruk.cuni.cz. cuni.cz. 86400 IN RRSIG ( NS 13 2 86400 20250701124619 20250617120335 43474 cuni.cz. kGuXrri1r5IMz/HfKQfKlhRd9JdewsZpG+yAdIPrUhEDXdmhp3ZQgKHcW8RLBAphvjmDfZufYWtr PxS1qIN9EQ== ) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Query to cuce.ruk.cuni.cz for cuni.cz/SOA
	Received 390 bytes from 195.113.0.8
	;; Response received from [195.113.0.8] 390 octets ;; HEADER SECTION ;; id = 60745 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 5 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ;; {"EXTENDED-ERROR": {"ERROR": "Prohibited", "EXTRA-TEXT": "", "INFO-CODE": 18}} ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN SOA ;; ANSWER SECTION (2 records) cuni.cz. 86400 IN SOA ( golias.ruk.cuni.cz. postmaster.dec59.ruk.cuni.cz. 2025061845 ;serial 28800 ;refresh 7200 ;retry 1209600 ;expire 600 ;minimum ) cuni.cz. 86400 IN RRSIG ( SOA 13 2 86400 20250705222420 20250621212420 43474 cuni.cz. eIa8oMF8SgpkaGJPE9rAPqIRxLjHbb27Z+wXJYOtgX1iKEJPc9Eqd+XqBtoUr55LNQC9tjjfEYST /Ea8GpHq3A== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN NS david.ruk.cuni.cz. cuni.cz. 86400 IN NS nsa.ces.net. cuni.cz. 86400 IN NS cuce.ruk.cuni.cz. cuni.cz. 86400 IN RRSIG ( NS 13 2 86400 20250701124619 20250617120335 43474 cuni.cz. kGuXrri1r5IMz/HfKQfKlhRd9JdewsZpG+yAdIPrUhEDXdmhp3ZQgKHcW8RLBAphvjmDfZufYWtr PxS1qIN9EQ== ) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Query to nsa.ces.net for cuni.cz/SOA
	Received 516 bytes from 195.113.144.205
	;; Response received from [195.113.144.205] 516 octets ;; HEADER SECTION ;; id = 53324 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 5 arcount = 7 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1472, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN SOA ;; ANSWER SECTION (2 records) cuni.cz. 86400 IN SOA ( golias.ruk.cuni.cz. postmaster.dec59.ruk.cuni.cz. 2025061845 ;serial 28800 ;refresh 7200 ;retry 1209600 ;expire 600 ;minimum ) cuni.cz. 86400 IN RRSIG ( SOA 13 2 86400 20250705222420 20250621212420 43474 cuni.cz. eIa8oMF8SgpkaGJPE9rAPqIRxLjHbb27Z+wXJYOtgX1iKEJPc9Eqd+XqBtoUr55LNQC9tjjfEYST /Ea8GpHq3A== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS nsa.ces.net. cuni.cz. 86400 IN NS cuce.ruk.cuni.cz. cuni.cz. 86400 IN NS david.ruk.cuni.cz. cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN RRSIG ( NS 13 2 86400 20250701124619 20250617120335 43474 cuni.cz. kGuXrri1r5IMz/HfKQfKlhRd9JdewsZpG+yAdIPrUhEDXdmhp3ZQgKHcW8RLBAphvjmDfZufYWtr PxS1qIN9EQ== ) ;; ADDITIONAL SECTION (7 records) cuce.ruk.cuni.cz. 86400 IN A 195.113.0.8 david.ruk.cuni.cz. 86400 IN A 78.128.213.242 golias.ruk.cuni.cz. 86400 IN A 195.113.0.2 cuce.ruk.cuni.cz. 86400 IN AAAA 2001:718:1e03:1::8 david.ruk.cuni.cz. 86400 IN AAAA 2001:718:1203:502::2 golias.ruk.cuni.cz. 86400 IN AAAA 2001:718:1e03:1::2 ;; { "EDNS-VERSION": 0 }
	Query to david.ruk.cuni.cz for cuni.cz/A
	Received 353 bytes from 78.128.213.242
	;; Response received from [78.128.213.242] 353 octets ;; HEADER SECTION ;; id = 35244 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 5 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ;; {"EXTENDED-ERROR": {"ERROR": "Prohibited", "EXTRA-TEXT": "", "INFO-CODE": 18}} ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN A ;; ANSWER SECTION (2 records) cuni.cz. 86400 IN A 195.113.89.35 cuni.cz. 86400 IN RRSIG ( A 13 2 86400 20250701122912 20250617115610 43474 cuni.cz. dmZp69D0uoHUU0QA2NawfFJW4rZbFj5wJU5AIX92AlinCqDsfQBPvabYge77/h/XDpgqn7+kicOf VGDP10kglA== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS cuce.ruk.cuni.cz. cuni.cz. 86400 IN NS nsa.ces.net. cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN NS david.ruk.cuni.cz. cuni.cz. 86400 IN RRSIG ( NS 13 2 86400 20250701124619 20250617120335 43474 cuni.cz. kGuXrri1r5IMz/HfKQfKlhRd9JdewsZpG+yAdIPrUhEDXdmhp3ZQgKHcW8RLBAphvjmDfZufYWtr PxS1qIN9EQ== ) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	cuni.cz A RR has value 195.113.89.35
	Found 1 RRSIGs over A RRset
	`cuni.cz. 86400 IN RRSIG ( A 13 2 86400 20250701122912 20250617115610 43474 cuni.cz. dmZp69D0uoHUU0QA2NawfFJW4rZbFj5wJU5AIX92AlinCqDsfQBPvabYge77/h/XDpgqn7+kicOf VGDP10kglA== )`
	RRSIG=43474 and DNSKEY=43474/SEP verifies the A RRset

cuni.cz

	Query to cuce.ruk.cuni.cz for cuni.cz/A
	Received 353 bytes from 195.113.0.8
	;; Response received from [195.113.0.8] 353 octets ;; HEADER SECTION ;; id = 41331 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 5 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ;; {"EXTENDED-ERROR": {"ERROR": "Prohibited", "EXTRA-TEXT": "", "INFO-CODE": 18}} ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN A ;; ANSWER SECTION (2 records) cuni.cz. 86400 IN A 195.113.89.35 cuni.cz. 86400 IN RRSIG ( A 13 2 86400 20250701122912 20250617115610 43474 cuni.cz. dmZp69D0uoHUU0QA2NawfFJW4rZbFj5wJU5AIX92AlinCqDsfQBPvabYge77/h/XDpgqn7+kicOf VGDP10kglA== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS david.ruk.cuni.cz. cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN NS nsa.ces.net. cuni.cz. 86400 IN NS cuce.ruk.cuni.cz. cuni.cz. 86400 IN RRSIG ( NS 13 2 86400 20250701124619 20250617120335 43474 cuni.cz. kGuXrri1r5IMz/HfKQfKlhRd9JdewsZpG+yAdIPrUhEDXdmhp3ZQgKHcW8RLBAphvjmDfZufYWtr PxS1qIN9EQ== ) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	cuce.ruk.cuni.cz is authoritative for cuni.cz
	Found RRSIG signed by cuni.cz zone
	Query to cuce.ruk.cuni.cz for cuni.cz/A
	Received 353 bytes from 195.113.0.8
	;; Response received from [195.113.0.8] 353 octets ;; HEADER SECTION ;; id = 753 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 5 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ;; {"EXTENDED-ERROR": {"ERROR": "Prohibited", "EXTRA-TEXT": "", "INFO-CODE": 18}} ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN A ;; ANSWER SECTION (2 records) cuni.cz. 86400 IN A 195.113.89.35 cuni.cz. 86400 IN RRSIG ( A 13 2 86400 20250701122912 20250617115610 43474 cuni.cz. dmZp69D0uoHUU0QA2NawfFJW4rZbFj5wJU5AIX92AlinCqDsfQBPvabYge77/h/XDpgqn7+kicOf VGDP10kglA== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS cuce.ruk.cuni.cz. cuni.cz. 86400 IN NS david.ruk.cuni.cz. cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN NS nsa.ces.net. cuni.cz. 86400 IN RRSIG ( NS 13 2 86400 20250701124619 20250617120335 43474 cuni.cz. kGuXrri1r5IMz/HfKQfKlhRd9JdewsZpG+yAdIPrUhEDXdmhp3ZQgKHcW8RLBAphvjmDfZufYWtr PxS1qIN9EQ== ) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	cuni.cz A RR has value 195.113.89.35
	Found 1 RRSIGs over A RRset
	`cuni.cz. 86400 IN RRSIG ( A 13 2 86400 20250701122912 20250617115610 43474 cuni.cz. dmZp69D0uoHUU0QA2NawfFJW4rZbFj5wJU5AIX92AlinCqDsfQBPvabYge77/h/XDpgqn7+kicOf VGDP10kglA== )`
	RRSIG=43474 and DNSKEY=43474/SEP verifies the A RRset

cuni.cz

	Query to nsa.ces.net for cuni.cz/A
	Received 479 bytes from 195.113.144.205
	;; Response received from [195.113.144.205] 479 octets ;; HEADER SECTION ;; id = 58277 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 5 arcount = 7 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1472, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN A ;; ANSWER SECTION (2 records) cuni.cz. 86400 IN A 195.113.89.35 cuni.cz. 86400 IN RRSIG ( A 13 2 86400 20250701122912 20250617115610 43474 cuni.cz. dmZp69D0uoHUU0QA2NawfFJW4rZbFj5wJU5AIX92AlinCqDsfQBPvabYge77/h/XDpgqn7+kicOf VGDP10kglA== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS nsa.ces.net. cuni.cz. 86400 IN NS cuce.ruk.cuni.cz. cuni.cz. 86400 IN NS david.ruk.cuni.cz. cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN RRSIG ( NS 13 2 86400 20250701124619 20250617120335 43474 cuni.cz. kGuXrri1r5IMz/HfKQfKlhRd9JdewsZpG+yAdIPrUhEDXdmhp3ZQgKHcW8RLBAphvjmDfZufYWtr PxS1qIN9EQ== ) ;; ADDITIONAL SECTION (7 records) cuce.ruk.cuni.cz. 86400 IN A 195.113.0.8 david.ruk.cuni.cz. 86400 IN A 78.128.213.242 golias.ruk.cuni.cz. 86400 IN A 195.113.0.2 cuce.ruk.cuni.cz. 86400 IN AAAA 2001:718:1e03:1::8 david.ruk.cuni.cz. 86400 IN AAAA 2001:718:1203:502::2 golias.ruk.cuni.cz. 86400 IN AAAA 2001:718:1e03:1::2 ;; { "EDNS-VERSION": 0 }
	nsa.ces.net is authoritative for cuni.cz
	Found RRSIG signed by cuni.cz zone
	Query to nsa.ces.net for cuni.cz/A
	Received 479 bytes from 195.113.144.205
	;; Response received from [195.113.144.205] 479 octets ;; HEADER SECTION ;; id = 24398 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 5 arcount = 7 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1472, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN A ;; ANSWER SECTION (2 records) cuni.cz. 86400 IN A 195.113.89.35 cuni.cz. 86400 IN RRSIG ( A 13 2 86400 20250701122912 20250617115610 43474 cuni.cz. dmZp69D0uoHUU0QA2NawfFJW4rZbFj5wJU5AIX92AlinCqDsfQBPvabYge77/h/XDpgqn7+kicOf VGDP10kglA== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS nsa.ces.net. cuni.cz. 86400 IN NS cuce.ruk.cuni.cz. cuni.cz. 86400 IN NS david.ruk.cuni.cz. cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN RRSIG ( NS 13 2 86400 20250701124619 20250617120335 43474 cuni.cz. kGuXrri1r5IMz/HfKQfKlhRd9JdewsZpG+yAdIPrUhEDXdmhp3ZQgKHcW8RLBAphvjmDfZufYWtr PxS1qIN9EQ== ) ;; ADDITIONAL SECTION (7 records) cuce.ruk.cuni.cz. 86400 IN A 195.113.0.8 david.ruk.cuni.cz. 86400 IN A 78.128.213.242 golias.ruk.cuni.cz. 86400 IN A 195.113.0.2 cuce.ruk.cuni.cz. 86400 IN AAAA 2001:718:1e03:1::8 david.ruk.cuni.cz. 86400 IN AAAA 2001:718:1203:502::2 golias.ruk.cuni.cz. 86400 IN AAAA 2001:718:1e03:1::2 ;; { "EDNS-VERSION": 0 }
	cuni.cz A RR has value 195.113.89.35
	Found 1 RRSIGs over A RRset
	`cuni.cz. 86400 IN RRSIG ( A 13 2 86400 20250701122912 20250617115610 43474 cuni.cz. dmZp69D0uoHUU0QA2NawfFJW4rZbFj5wJU5AIX92AlinCqDsfQBPvabYge77/h/XDpgqn7+kicOf VGDP10kglA== )`
	RRSIG=43474 and DNSKEY=43474/SEP verifies the A RRset

cuni.cz

	Query to golias.ruk.cuni.cz for cuni.cz/A
	Received 353 bytes from 195.113.0.2
	;; Response received from [195.113.0.2] 353 octets ;; HEADER SECTION ;; id = 42512 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 5 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ;; {"EXTENDED-ERROR": {"ERROR": "Prohibited", "EXTRA-TEXT": "", "INFO-CODE": 18}} ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN A ;; ANSWER SECTION (2 records) cuni.cz. 86400 IN A 195.113.89.35 cuni.cz. 86400 IN RRSIG ( A 13 2 86400 20250701122912 20250617115610 43474 cuni.cz. dmZp69D0uoHUU0QA2NawfFJW4rZbFj5wJU5AIX92AlinCqDsfQBPvabYge77/h/XDpgqn7+kicOf VGDP10kglA== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS david.ruk.cuni.cz. cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN NS nsa.ces.net. cuni.cz. 86400 IN NS cuce.ruk.cuni.cz. cuni.cz. 86400 IN RRSIG ( NS 13 2 86400 20250701124619 20250617120335 43474 cuni.cz. kGuXrri1r5IMz/HfKQfKlhRd9JdewsZpG+yAdIPrUhEDXdmhp3ZQgKHcW8RLBAphvjmDfZufYWtr PxS1qIN9EQ== ) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	golias.ruk.cuni.cz is authoritative for cuni.cz
	Found RRSIG signed by cuni.cz zone
	Query to golias.ruk.cuni.cz for cuni.cz/A
	Received 353 bytes from 195.113.0.2
	;; Response received from [195.113.0.2] 353 octets ;; HEADER SECTION ;; id = 35306 ;; qr = 1 aa = 1 tc = 0 rd = 0 opcode = QUERY ;; ra = 0 z = 0 ad = 0 cd = 0 rcode = NOERROR ;; do = 1 co = 0 ;; qdcount = 1 ancount = 2 ;; nscount = 5 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ;; {"EXTENDED-ERROR": {"ERROR": "Prohibited", "EXTRA-TEXT": "", "INFO-CODE": 18}} ] ;; } ;; QUESTION SECTION (1 record) ;; cuni.cz. IN A ;; ANSWER SECTION (2 records) cuni.cz. 86400 IN A 195.113.89.35 cuni.cz. 86400 IN RRSIG ( A 13 2 86400 20250701122912 20250617115610 43474 cuni.cz. dmZp69D0uoHUU0QA2NawfFJW4rZbFj5wJU5AIX92AlinCqDsfQBPvabYge77/h/XDpgqn7+kicOf VGDP10kglA== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS david.ruk.cuni.cz. cuni.cz. 86400 IN NS nsa.ces.net. cuni.cz. 86400 IN NS cuce.ruk.cuni.cz. cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN RRSIG ( NS 13 2 86400 20250701124619 20250617120335 43474 cuni.cz. kGuXrri1r5IMz/HfKQfKlhRd9JdewsZpG+yAdIPrUhEDXdmhp3ZQgKHcW8RLBAphvjmDfZufYWtr PxS1qIN9EQ== ) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	cuni.cz A RR has value 195.113.89.35
	Found 1 RRSIGs over A RRset
	`cuni.cz. 86400 IN RRSIG ( A 13 2 86400 20250701122912 20250617115610 43474 cuni.cz. dmZp69D0uoHUU0QA2NawfFJW4rZbFj5wJU5AIX92AlinCqDsfQBPvabYge77/h/XDpgqn7+kicOf VGDP10kglA== )`
	RRSIG=43474 and DNSKEY=43474/SEP verifies the A RRset

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