DNSSEC Debugger

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Detail: more(+) / less(-)

Time: 2026-04-17 09:55:54 UTC

Analyzing DNSSEC problems for cuni.cz

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

DS=38696/SHA-256 is now in the chain-of-trust

	Checking DS between Trust Anchor and .
	`. IN DS ( 20326 8 2 e06d44b80b8f1d39a95c0b0d7c65d08458e880409bbc683457104237c7f8ec8d )`
	`. IN DS ( 38696 8 2 683d2d0acb8c9b712a1948b27f741219298d0a450d612c483af444a4c0fb2b16 )`
	Query to e.root-servers.net for ./DNSKEY
	Received 1139 bytes from 192.203.230.10
	;; Response received from [192.203.230.10] 1139 octets ;; HEADER SECTION ;; id = 36275 ;; 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 = 4 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 4096, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; . IN DNSKEY ;; ANSWER SECTION (4 records) . 172800 IN DNSKEY ( 256 3 8 AwEAAb5dDYffpgAJ8VUGLwQtWXPlQWsjIFJtCM00/XaKU+8ln+ofah3q2KxEIjvzQg+nqdxRj+8e mtPne1mtYcbFWP4Q9E+DniOJLK09R05FuzvGbrG7DDdRDUX/cedFdV7O8pFEAYpJqYNR9BCTIAV9 73DO2biauKSA31b7I2lK/woxoR1tf5cqJ4SMbJUviuHicAEoUi2ATswloZNWd5T5thmEFZnxFx7D 5UgKCY7oflS7+GU7dNJwEtmFnWYVETHN0kHXVz6aguouaAZp706YXNIoR/iTgQhmsR7XX+wL0Z8Q M2LxQIyU6vRZ06IyuJMGRMiwkSuGElbumyBt12JZbrU= ) ; keytag 54393 . 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 ( 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 20260502000000 20260411000000 20326 . ldfPZ7Q9Ca8GfxnsJcPAMMy9Dt1qfL2guvByLtN9kRcMMn8g3ukazjrv5Bj/KOLEXV++Zp8g8UpL /80NUKP4ZA1Yq3gmEE2hyEG7M964fUrTaB9w9leATi8UK176zklnB7trP81yL6TIZmaCImUMWVkU n8uGeIJUaVz2XpboM5PGo2gEQH2mVAavFammRoDbj4gnMJvXgOMIZtLIIGcOaxuY5sFQo1MDQnoQ OYMAHVqdUu4Ld+Jq29ktutAXUK6hobUBss0me2y+xlu3fmZ5JiKSJOPDiBQBqjUAhueBKEZpamt/ gr8NtHLe0QLKs2h3XhsGNHE7Ksr3WwiCCFHP0A== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 3 DNSKEY records for .
	`. 172800 IN DNSKEY ( 256 3 8 AwEAAb5dDYffpgAJ8VUGLwQtWXPlQWsjIFJtCM00/XaKU+8ln+ofah3q2KxEIjvzQg+nqdxRj+8e mtPne1mtYcbFWP4Q9E+DniOJLK09R05FuzvGbrG7DDdRDUX/cedFdV7O8pFEAYpJqYNR9BCTIAV9 73DO2biauKSA31b7I2lK/woxoR1tf5cqJ4SMbJUviuHicAEoUi2ATswloZNWd5T5thmEFZnxFx7D 5UgKCY7oflS7+GU7dNJwEtmFnWYVETHN0kHXVz6aguouaAZp706YXNIoR/iTgQhmsR7XX+wL0Z8Q M2LxQIyU6vRZ06IyuJMGRMiwkSuGElbumyBt12JZbrU= ) ; keytag 54393`
	`. 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 ( 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
	DNSKEY=38696/SEP is now in the chain-of-trust
	DS=38696/SHA-256 verifies DNSKEY=38696/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`. 172800 IN RRSIG ( DNSKEY 8 0 172800 20260502000000 20260411000000 20326 . ldfPZ7Q9Ca8GfxnsJcPAMMy9Dt1qfL2guvByLtN9kRcMMn8g3ukazjrv5Bj/KOLEXV++Zp8g8UpL /80NUKP4ZA1Yq3gmEE2hyEG7M964fUrTaB9w9leATi8UK176zklnB7trP81yL6TIZmaCImUMWVkU n8uGeIJUaVz2XpboM5PGo2gEQH2mVAavFammRoDbj4gnMJvXgOMIZtLIIGcOaxuY5sFQo1MDQnoQ OYMAHVqdUu4Ld+Jq29ktutAXUK6hobUBss0me2y+xlu3fmZ5JiKSJOPDiBQBqjUAhueBKEZpamt/ gr8NtHLe0QLKs2h3XhsGNHE7Ksr3WwiCCFHP0A== )`
	RRSIG=20326 and DNSKEY=20326/SEP verifies the DNSKEY RRset
	DNSKEY=54393 is now in the chain-of-trust
	Query to e.root-servers.net for cuni.cz/A
	Received 618 bytes from 192.203.230.10
	;; Response received from [192.203.230.10] 618 octets ;; HEADER SECTION ;; id = 30875 ;; 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": 4096, ;; "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 20260430050000 20260417040000 54393 . bBRNGdHTPx9ppv484iT3h6FslthMxKrrPjzNuLSqw06iVz2KdfW3H7BbX7lOCjr+081qhfjUpf2p YUJDiRyawjQ06ggBWuugeZkyYQG/+4ZxKf2CAjhmK5nzcG8bCP+LQHCMFRzWFAcBZvWw5I7mv0wX mNZjjX5c7Y34sl/+4AAfphbuxWCGKHT4t3lQAni0FJk23pRkKPqKDCfL0Ah4sV0bu+Cfwoe84SL/ yi5wf58161oZ70cNaWAAKQ8yTP8ux7jOAxnWRLjp2H5m69YdlPRWPCftwMe72QIfzhwe5vlKZE90 T1d4bj/C+Gcnssa+2aXTc/PXi+UrKAMFd9OFIw== ) ;; 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 m.root-servers.net for cz/DNSKEY
	Received 615 bytes from 202.12.27.33
	;; Response received from [202.12.27.33] 615 octets ;; HEADER SECTION ;; id = 56054 ;; 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 20260430050000 20260417040000 54393 . bBRNGdHTPx9ppv484iT3h6FslthMxKrrPjzNuLSqw06iVz2KdfW3H7BbX7lOCjr+081qhfjUpf2p YUJDiRyawjQ06ggBWuugeZkyYQG/+4ZxKf2CAjhmK5nzcG8bCP+LQHCMFRzWFAcBZvWw5I7mv0wX mNZjjX5c7Y34sl/+4AAfphbuxWCGKHT4t3lQAni0FJk23pRkKPqKDCfL0Ah4sV0bu+Cfwoe84SL/ yi5wf58161oZ70cNaWAAKQ8yTP8ux7jOAxnWRLjp2H5m69YdlPRWPCftwMe72QIfzhwe5vlKZE90 T1d4bj/C+Gcnssa+2aXTc/PXi+UrKAMFd9OFIw== ) ;; ADDITIONAL SECTION (9 records) d.ns.nic.cz. 172800 IN A 193.29.206.1 c.ns.nic.cz. 172800 IN A 194.0.14.1 b.ns.nic.cz. 172800 IN A 194.0.13.1 a.ns.nic.cz. 172800 IN A 194.0.12.1 d.ns.nic.cz. 172800 IN AAAA 2001:678:1::1 c.ns.nic.cz. 172800 IN AAAA 2001:678:11::1 b.ns.nic.cz. 172800 IN AAAA 2001:678:10::1 a.ns.nic.cz. 172800 IN AAAA 2001:678:f::1 ;; { "EDNS-VERSION": 0 }
	Found child zone cz

	Checking DS between . and cz
	Query to h.root-servers.net for cz/DS
	Received 366 bytes from 198.97.190.53
	;; Response received from [198.97.190.53] 366 octets ;; HEADER SECTION ;; id = 14798 ;; 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) ;; cz. IN DS ;; ANSWER SECTION (2 records) cz. 86400 IN DS ( 20237 13 2 cff0f3ecdbc529c1f0031ba1840bfb835853b9209ed1e508fff48451d7b778e2 ) cz. 86400 IN RRSIG ( DS 8 1 86400 20260430050000 20260417040000 54393 . bBRNGdHTPx9ppv484iT3h6FslthMxKrrPjzNuLSqw06iVz2KdfW3H7BbX7lOCjr+081qhfjUpf2p YUJDiRyawjQ06ggBWuugeZkyYQG/+4ZxKf2CAjhmK5nzcG8bCP+LQHCMFRzWFAcBZvWw5I7mv0wX mNZjjX5c7Y34sl/+4AAfphbuxWCGKHT4t3lQAni0FJk23pRkKPqKDCfL0Ah4sV0bu+Cfwoe84SL/ yi5wf58161oZ70cNaWAAKQ8yTP8ux7jOAxnWRLjp2H5m69YdlPRWPCftwMe72QIfzhwe5vlKZE90 T1d4bj/C+Gcnssa+2aXTc/PXi+UrKAMFd9OFIw== ) ;; 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 20260430050000 20260417040000 54393 . bBRNGdHTPx9ppv484iT3h6FslthMxKrrPjzNuLSqw06iVz2KdfW3H7BbX7lOCjr+081qhfjUpf2p YUJDiRyawjQ06ggBWuugeZkyYQG/+4ZxKf2CAjhmK5nzcG8bCP+LQHCMFRzWFAcBZvWw5I7mv0wX mNZjjX5c7Y34sl/+4AAfphbuxWCGKHT4t3lQAni0FJk23pRkKPqKDCfL0Ah4sV0bu+Cfwoe84SL/ yi5wf58161oZ70cNaWAAKQ8yTP8ux7jOAxnWRLjp2H5m69YdlPRWPCftwMe72QIfzhwe5vlKZE90 T1d4bj/C+Gcnssa+2aXTc/PXi+UrKAMFd9OFIw== )`
	RRSIG=54393 and DNSKEY=54393 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 d.ns.nic.cz for cz/DNSKEY
	Received 289 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 289 octets ;; HEADER SECTION ;; id = 22505 ;; 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 ( 257 3 13 nqzH7xP1QU5UOVy/VvxFSlrB/XgX9JDJzj51PzIj35TXjZTyalTlAT/f7PAfaSD5mEG1N8Vk9NmI 2nxgQqhzDQ== ) ; keytag 20237 cz. 3600 IN DNSKEY ( 256 3 13 8gZxcyPWWLwX9/ejpFTBzls/8mO07gMRSTfb7YOE8zj9svJEadG62nGBL9PKsPxNG4ABh6dMbaqF +/sDmU7p8Q== ) ; keytag 44691 cz. 3600 IN RRSIG ( DNSKEY 13 1 3600 20260425022134 20260411005134 20237 cz. fsQnWBuFng7KFpYrbKHjGnsJ0CNhXW4c04f6bISeq+5+sLD5nUO3sFy/VW3twLUcXAUKnR/i3aej hEOv8QgACw== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 2 DNSKEY records for cz
	`cz. 3600 IN DNSKEY ( 257 3 13 nqzH7xP1QU5UOVy/VvxFSlrB/XgX9JDJzj51PzIj35TXjZTyalTlAT/f7PAfaSD5mEG1N8Vk9NmI 2nxgQqhzDQ== ) ; keytag 20237`
	`cz. 3600 IN DNSKEY ( 256 3 13 8gZxcyPWWLwX9/ejpFTBzls/8mO07gMRSTfb7YOE8zj9svJEadG62nGBL9PKsPxNG4ABh6dMbaqF +/sDmU7p8Q== ) ; keytag 44691`
	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 20260425022134 20260411005134 20237 cz. fsQnWBuFng7KFpYrbKHjGnsJ0CNhXW4c04f6bISeq+5+sLD5nUO3sFy/VW3twLUcXAUKnR/i3aej hEOv8QgACw== )`
	RRSIG=20237 and DNSKEY=20237/SEP verifies the DNSKEY RRset
	DNSKEY=44691 is now in the chain-of-trust
	Query to d.ns.nic.cz for cuni.cz/A
	Received 403 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 403 octets ;; HEADER SECTION ;; id = 15969 ;; 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 cuce.ruk.cuni.cz. cuni.cz. 3600 IN NS nsa.ces.net. cuni.cz. 3600 IN NS golias.ruk.cuni.cz. 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 20260424214717 20260410201717 44691 cz. SR5o1md4+w6CUDx+xouUaumd5vZKI4xQfLtEcbOET8AdnCtxIssjbkgOcI59nmmJnjGaJ9CGepPE XvUUyZLXHQ== ) ;; ADDITIONAL SECTION (7 records) cuce.ruk.cuni.cz. 3600 IN A 195.113.0.8 david.ruk.cuni.cz. 3600 IN A 78.128.213.242 golias.ruk.cuni.cz. 3600 IN A 195.113.0.2 cuce.ruk.cuni.cz. 3600 IN AAAA 2001:718:1e03:1::8 david.ruk.cuni.cz. 3600 IN AAAA 2001:718:1203:502::2 golias.ruk.cuni.cz. 3600 IN AAAA 2001:718:1e03:1::2 ;; { "EDNS-VERSION": 0 }
	Query to d.ns.nic.cz for cuni.cz/DNSKEY
	Received 403 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 403 octets ;; HEADER SECTION ;; id = 55990 ;; 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 cuce.ruk.cuni.cz. cuni.cz. 3600 IN NS nsa.ces.net. cuni.cz. 3600 IN NS golias.ruk.cuni.cz. 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 20260424214717 20260410201717 44691 cz. SR5o1md4+w6CUDx+xouUaumd5vZKI4xQfLtEcbOET8AdnCtxIssjbkgOcI59nmmJnjGaJ9CGepPE XvUUyZLXHQ== ) ;; ADDITIONAL SECTION (7 records) cuce.ruk.cuni.cz. 3600 IN A 195.113.0.8 david.ruk.cuni.cz. 3600 IN A 78.128.213.242 golias.ruk.cuni.cz. 3600 IN A 195.113.0.2 cuce.ruk.cuni.cz. 3600 IN AAAA 2001:718:1e03:1::8 david.ruk.cuni.cz. 3600 IN AAAA 2001:718:1203:502::2 golias.ruk.cuni.cz. 3600 IN AAAA 2001:718:1e03:1::2 ;; { "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 = 39164 ;; 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 20260424214717 20260410201717 44691 cz. SR5o1md4+w6CUDx+xouUaumd5vZKI4xQfLtEcbOET8AdnCtxIssjbkgOcI59nmmJnjGaJ9CGepPE XvUUyZLXHQ== ) ;; 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 20260424214717 20260410201717 44691 cz. SR5o1md4+w6CUDx+xouUaumd5vZKI4xQfLtEcbOET8AdnCtxIssjbkgOcI59nmmJnjGaJ9CGepPE XvUUyZLXHQ== )`
	RRSIG=44691 and DNSKEY=44691 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 = 53685 ;; 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 20260424100135 20260410094759 43474 cuni.cz. udUq6M/rAgqg4sPEFy0s+zFcUGZtOX9zDDXrxhsjMjvf4nb6DuPS9nZzTpOwhKDf15PMBytTCwnN UPppR7Xh7g== ) ;; 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 20260424100135 20260410094759 43474 cuni.cz. udUq6M/rAgqg4sPEFy0s+zFcUGZtOX9zDDXrxhsjMjvf4nb6DuPS9nZzTpOwhKDf15PMBytTCwnN UPppR7Xh7g== )`
	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 = 44052 ;; 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. 3600 IN A 195.113.89.54 cuni.cz. 3600 IN RRSIG ( A 13 2 3600 20260424003215 20260409235241 43474 cuni.cz. m4Mez0B9OsbxPCnhzD++UQnix8YH8p4d2wggsVfmgyUG1o5I7uhg9JbVfMp7TpEfqeIN/62ne1RZ Bw/T+kSymQ== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS nsa.ces.net. cuni.cz. 86400 IN NS david.ruk.cuni.cz. 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 20260423163216 20260409160617 43474 cuni.cz. bFg8Hf//6jv0tkUlIQh1MJZdojB0ULc3gSUvRbgLDajcjgWnaHO6usVLsScsr1hu4SHmjGFY9AsH NiFxuDAOsw== ) ;; 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 = 32409 ;; 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. 2026041607 ;serial 28800 ;refresh 7200 ;retry 1209600 ;expire 600 ;minimum ) cuni.cz. 86400 IN RRSIG ( SOA 13 2 86400 20260501060050 20260417050050 43474 cuni.cz. ORIOSJX+f7+YfQSKUVDIW0z8aYj87wFP5Qqrz/xLCx2bsi/FmYlABjzPMTv0WxDotTrqGT7641Eq K/cK5vjXJA== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS nsa.ces.net. cuni.cz. 86400 IN NS david.ruk.cuni.cz. 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 20260423163216 20260409160617 43474 cuni.cz. bFg8Hf//6jv0tkUlIQh1MJZdojB0ULc3gSUvRbgLDajcjgWnaHO6usVLsScsr1hu4SHmjGFY9AsH NiFxuDAOsw== ) ;; 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 = 8169 ;; 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. 2026041607 ;serial 28800 ;refresh 7200 ;retry 1209600 ;expire 600 ;minimum ) cuni.cz. 86400 IN RRSIG ( SOA 13 2 86400 20260501060050 20260417050050 43474 cuni.cz. ORIOSJX+f7+YfQSKUVDIW0z8aYj87wFP5Qqrz/xLCx2bsi/FmYlABjzPMTv0WxDotTrqGT7641Eq K/cK5vjXJA== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN NS cuce.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 20260423163216 20260409160617 43474 cuni.cz. bFg8Hf//6jv0tkUlIQh1MJZdojB0ULc3gSUvRbgLDajcjgWnaHO6usVLsScsr1hu4SHmjGFY9AsH NiFxuDAOsw== ) ;; 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 = 16228 ;; 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. 2026041607 ;serial 28800 ;refresh 7200 ;retry 1209600 ;expire 600 ;minimum ) cuni.cz. 86400 IN RRSIG ( SOA 13 2 86400 20260501060050 20260417050050 43474 cuni.cz. ORIOSJX+f7+YfQSKUVDIW0z8aYj87wFP5Qqrz/xLCx2bsi/FmYlABjzPMTv0WxDotTrqGT7641Eq K/cK5vjXJA== ) ;; 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 20260423163216 20260409160617 43474 cuni.cz. bFg8Hf//6jv0tkUlIQh1MJZdojB0ULc3gSUvRbgLDajcjgWnaHO6usVLsScsr1hu4SHmjGFY9AsH NiFxuDAOsw== ) ;; 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
	cuni.cz A RR has value 195.113.89.54
	Found 1 RRSIGs over A RRset
	`cuni.cz. 3600 IN RRSIG ( A 13 2 3600 20260424003215 20260409235241 43474 cuni.cz. m4Mez0B9OsbxPCnhzD++UQnix8YH8p4d2wggsVfmgyUG1o5I7uhg9JbVfMp7TpEfqeIN/62ne1RZ Bw/T+kSymQ== )`
	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 = 7347 ;; 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. 3600 IN A 195.113.89.54 cuni.cz. 3600 IN RRSIG ( A 13 2 3600 20260424003215 20260409235241 43474 cuni.cz. m4Mez0B9OsbxPCnhzD++UQnix8YH8p4d2wggsVfmgyUG1o5I7uhg9JbVfMp7TpEfqeIN/62ne1RZ Bw/T+kSymQ== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN NS cuce.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 20260423163216 20260409160617 43474 cuni.cz. bFg8Hf//6jv0tkUlIQh1MJZdojB0ULc3gSUvRbgLDajcjgWnaHO6usVLsScsr1hu4SHmjGFY9AsH NiFxuDAOsw== ) ;; 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
	cuni.cz A RR has value 195.113.89.54
	Found 1 RRSIGs over A RRset
	`cuni.cz. 3600 IN RRSIG ( A 13 2 3600 20260424003215 20260409235241 43474 cuni.cz. m4Mez0B9OsbxPCnhzD++UQnix8YH8p4d2wggsVfmgyUG1o5I7uhg9JbVfMp7TpEfqeIN/62ne1RZ Bw/T+kSymQ== )`
	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 = 42940 ;; 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. 3600 IN A 195.113.89.54 cuni.cz. 3600 IN RRSIG ( A 13 2 3600 20260424003215 20260409235241 43474 cuni.cz. m4Mez0B9OsbxPCnhzD++UQnix8YH8p4d2wggsVfmgyUG1o5I7uhg9JbVfMp7TpEfqeIN/62ne1RZ Bw/T+kSymQ== ) ;; 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 20260423163216 20260409160617 43474 cuni.cz. bFg8Hf//6jv0tkUlIQh1MJZdojB0ULc3gSUvRbgLDajcjgWnaHO6usVLsScsr1hu4SHmjGFY9AsH NiFxuDAOsw== ) ;; 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
	cuni.cz A RR has value 195.113.89.54
	Found 1 RRSIGs over A RRset
	`cuni.cz. 3600 IN RRSIG ( A 13 2 3600 20260424003215 20260409235241 43474 cuni.cz. m4Mez0B9OsbxPCnhzD++UQnix8YH8p4d2wggsVfmgyUG1o5I7uhg9JbVfMp7TpEfqeIN/62ne1RZ Bw/T+kSymQ== )`
	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 = 54074 ;; 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. 3600 IN A 195.113.89.54 cuni.cz. 3600 IN RRSIG ( A 13 2 3600 20260424003215 20260409235241 43474 cuni.cz. m4Mez0B9OsbxPCnhzD++UQnix8YH8p4d2wggsVfmgyUG1o5I7uhg9JbVfMp7TpEfqeIN/62ne1RZ Bw/T+kSymQ== ) ;; AUTHORITY SECTION (5 records) cuni.cz. 86400 IN NS golias.ruk.cuni.cz. cuni.cz. 86400 IN NS cuce.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 20260423163216 20260409160617 43474 cuni.cz. bFg8Hf//6jv0tkUlIQh1MJZdojB0ULc3gSUvRbgLDajcjgWnaHO6usVLsScsr1hu4SHmjGFY9AsH NiFxuDAOsw== ) ;; 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
	cuni.cz A RR has value 195.113.89.54
	Found 1 RRSIGs over A RRset
	`cuni.cz. 3600 IN RRSIG ( A 13 2 3600 20260424003215 20260409235241 43474 cuni.cz. m4Mez0B9OsbxPCnhzD++UQnix8YH8p4d2wggsVfmgyUG1o5I7uhg9JbVfMp7TpEfqeIN/62ne1RZ Bw/T+kSymQ== )`
	RRSIG=43474 and DNSKEY=43474/SEP verifies the A RRset

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