DNSSEC Debugger

Domain Name:

Time: 2026-01-31 05:04:17 UTC

Analyzing DNSSEC problems for epfl.ch

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 f.root-servers.net for ./DNSKEY
	Received 1139 bytes from 192.5.5.241
	;; Response received from [192.5.5.241] 1139 octets ;; HEADER SECTION ;; id = 59348 ;; 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": 1472, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; . IN DNSKEY ;; ANSWER SECTION (4 records) . 172800 IN DNSKEY ( 256 3 8 AwEAAbNTVC2+pry4pc37pZI9Oj6b8FHxT3VGrvSPKLE1Tjyfe2kUZUtVX5xrv6AV4BVO+ygrYjGZ MNgEnbLU4zknnlnhI2e0g6iTza1aZh0dRZXGH16C1NUNq1CxBkUhIYQhQDeIOtLacx+RmFTc+hSH JJ2MJ79IS00kA7eKi6mofQ7SPJmdJVjI+JAx791y0f5QaB+iHGANU53FwiYXNUQjfAzCrtOaSevG sx8SO8BTaXLAjFq5eewOtwScVwfVDhEXlvpE6e+mIncwhNKaMRD9IPuHENqCNPI5MjxfAMVS6cEY 8eEozIkv/vHc+0Auu3n+Fcx6F2Js4KPXaHEShAXugfU= ) ; keytag 21831 . 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 20260211000000 20260121000000 20326 . EBetGA/PKYoAlq56mQMDn03GRImGJtuP7+VneaBFBz6bKPYOkJCeH+iWyvbdHc2EdpdPwod/fNV2 buvubzluWs2ORvqpr/w3awExDRBLgjuGRo8LyRlPG/utQh2tmjC5t5CzPKKtUOjKcotmlYgfV+pQ CT1zqZfavyxYJXMGILkSVcQe+3rraAvzXQoZzMfewQZOJrhyFfKtugkpOLWCuWg5/dKleyYB8G4r EWDPhywRt+GSlOgFWhNYTHhEpZsSA6vnb3FTtIgu7CqlDD1zOTrIFuiv7L8cFizHm542Bm69lbzg QGJGdgSwOGAe4Aj55UXMdRobYUdhoWOsdGOJKA== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 3 DNSKEY records for .
	`. 172800 IN DNSKEY ( 256 3 8 AwEAAbNTVC2+pry4pc37pZI9Oj6b8FHxT3VGrvSPKLE1Tjyfe2kUZUtVX5xrv6AV4BVO+ygrYjGZ MNgEnbLU4zknnlnhI2e0g6iTza1aZh0dRZXGH16C1NUNq1CxBkUhIYQhQDeIOtLacx+RmFTc+hSH JJ2MJ79IS00kA7eKi6mofQ7SPJmdJVjI+JAx791y0f5QaB+iHGANU53FwiYXNUQjfAzCrtOaSevG sx8SO8BTaXLAjFq5eewOtwScVwfVDhEXlvpE6e+mIncwhNKaMRD9IPuHENqCNPI5MjxfAMVS6cEY 8eEozIkv/vHc+0Auu3n+Fcx6F2Js4KPXaHEShAXugfU= ) ; keytag 21831`
	`. 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
	Found 1 RRSIGs over DNSKEY RRset
	`. 172800 IN RRSIG ( DNSKEY 8 0 172800 20260211000000 20260121000000 20326 . EBetGA/PKYoAlq56mQMDn03GRImGJtuP7+VneaBFBz6bKPYOkJCeH+iWyvbdHc2EdpdPwod/fNV2 buvubzluWs2ORvqpr/w3awExDRBLgjuGRo8LyRlPG/utQh2tmjC5t5CzPKKtUOjKcotmlYgfV+pQ CT1zqZfavyxYJXMGILkSVcQe+3rraAvzXQoZzMfewQZOJrhyFfKtugkpOLWCuWg5/dKleyYB8G4r EWDPhywRt+GSlOgFWhNYTHhEpZsSA6vnb3FTtIgu7CqlDD1zOTrIFuiv7L8cFizHm542Bm69lbzg QGJGdgSwOGAe4Aj55UXMdRobYUdhoWOsdGOJKA== )`
	RRSIG=20326 and DNSKEY=20326/SEP verifies the DNSKEY RRset
	DNSKEY=21831 is now in the chain-of-trust
	DNSKEY=38696/SEP is now in the chain-of-trust
	Query to h.root-servers.net for epfl.ch/A
	Received 675 bytes from 198.97.190.53
	;; Response received from [198.97.190.53] 675 octets ;; HEADER SECTION ;; id = 30901 ;; 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 = 7 arcount = 11 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; epfl.ch. IN A ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (7 records) ch. 172800 IN NS a.nic.ch. ch. 172800 IN NS b.nic.ch. ch. 172800 IN NS d.nic.ch. ch. 172800 IN NS e.nic.ch. ch. 172800 IN NS f.nic.ch. ch. 86400 IN DS ( 58745 13 2 083ed7735a6aad21d51cb0af5c485055602b392435e92b2c13614a6bc8d46b92 ) ch. 86400 IN RRSIG ( DS 8 1 86400 20260212230000 20260130220000 21831 . OonZ0VQ+BKgjXIKzbla1zdzAmlno51aSHFKFlZw9oz+j29bctPXDZlvwBZ0UZ8xKbPWHNN003oMq zsLuEDB0qgshOeMGhsRD1hjlGrROzt52MVvzw+m6colo62GyQ6V0JiwqLi8/zO1/OdBp3OVKpmEz mqXS8NWQv22w5KQBRMOBDl953HZI+ljkHsMXwRva2lVg4zxMl0XLmwEB70fdnZSeuofA8R5N0qxf PxM4cT4AVmKDpmLJmoHiavbi2yly/GiKt3f3GRtOCbgL2jYEMo9VcnSbAhli3Aw4WInTB22XSO4I BfdS/wZfGPbmZESLePIcQks378fNRc/KD6yNWA== ) ;; ADDITIONAL SECTION (11 records) a.nic.ch. 172800 IN A 130.59.31.41 b.nic.ch. 172800 IN A 130.59.31.43 d.nic.ch. 172800 IN A 194.0.25.39 e.nic.ch. 172800 IN A 194.0.17.1 f.nic.ch. 172800 IN A 194.146.106.10 a.nic.ch. 172800 IN AAAA 2001:620:0:ff::56 b.nic.ch. 172800 IN AAAA 2001:620:0:ff::58 d.nic.ch. 172800 IN AAAA 2001:678:20::39 e.nic.ch. 172800 IN AAAA 2001:678:3::1 f.nic.ch. 172800 IN AAAA 2001:67c:1010:2::53 ;; { "EDNS-VERSION": 0 }
	Query to h.root-servers.net for ch/DNSKEY
	Received 670 bytes from 198.97.190.53
	;; Response received from [198.97.190.53] 670 octets ;; HEADER SECTION ;; id = 62323 ;; 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 = 7 arcount = 11 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; ch. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (7 records) ch. 172800 IN NS a.nic.ch. ch. 172800 IN NS b.nic.ch. ch. 172800 IN NS d.nic.ch. ch. 172800 IN NS e.nic.ch. ch. 172800 IN NS f.nic.ch. ch. 86400 IN DS ( 58745 13 2 083ed7735a6aad21d51cb0af5c485055602b392435e92b2c13614a6bc8d46b92 ) ch. 86400 IN RRSIG ( DS 8 1 86400 20260212230000 20260130220000 21831 . OonZ0VQ+BKgjXIKzbla1zdzAmlno51aSHFKFlZw9oz+j29bctPXDZlvwBZ0UZ8xKbPWHNN003oMq zsLuEDB0qgshOeMGhsRD1hjlGrROzt52MVvzw+m6colo62GyQ6V0JiwqLi8/zO1/OdBp3OVKpmEz mqXS8NWQv22w5KQBRMOBDl953HZI+ljkHsMXwRva2lVg4zxMl0XLmwEB70fdnZSeuofA8R5N0qxf PxM4cT4AVmKDpmLJmoHiavbi2yly/GiKt3f3GRtOCbgL2jYEMo9VcnSbAhli3Aw4WInTB22XSO4I BfdS/wZfGPbmZESLePIcQks378fNRc/KD6yNWA== ) ;; ADDITIONAL SECTION (11 records) a.nic.ch. 172800 IN A 130.59.31.41 b.nic.ch. 172800 IN A 130.59.31.43 d.nic.ch. 172800 IN A 194.0.25.39 e.nic.ch. 172800 IN A 194.0.17.1 f.nic.ch. 172800 IN A 194.146.106.10 a.nic.ch. 172800 IN AAAA 2001:620:0:ff::56 b.nic.ch. 172800 IN AAAA 2001:620:0:ff::58 d.nic.ch. 172800 IN AAAA 2001:678:20::39 e.nic.ch. 172800 IN AAAA 2001:678:3::1 f.nic.ch. 172800 IN AAAA 2001:67c:1010:2::53 ;; { "EDNS-VERSION": 0 }
	Found child zone ch

	Checking DS between . and ch
	Query to e.root-servers.net for ch/DS
	Received 366 bytes from 192.203.230.10
	;; Response received from [192.203.230.10] 366 octets ;; HEADER SECTION ;; id = 1015 ;; 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) ;; ch. IN DS ;; ANSWER SECTION (2 records) ch. 86400 IN DS ( 58745 13 2 083ed7735a6aad21d51cb0af5c485055602b392435e92b2c13614a6bc8d46b92 ) ch. 86400 IN RRSIG ( DS 8 1 86400 20260212230000 20260130220000 21831 . OonZ0VQ+BKgjXIKzbla1zdzAmlno51aSHFKFlZw9oz+j29bctPXDZlvwBZ0UZ8xKbPWHNN003oMq zsLuEDB0qgshOeMGhsRD1hjlGrROzt52MVvzw+m6colo62GyQ6V0JiwqLi8/zO1/OdBp3OVKpmEz mqXS8NWQv22w5KQBRMOBDl953HZI+ljkHsMXwRva2lVg4zxMl0XLmwEB70fdnZSeuofA8R5N0qxf PxM4cT4AVmKDpmLJmoHiavbi2yly/GiKt3f3GRtOCbgL2jYEMo9VcnSbAhli3Aw4WInTB22XSO4I BfdS/wZfGPbmZESLePIcQks378fNRc/KD6yNWA== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 1 DS records for ch in the . zone
	DS=58745/SHA-256 has algorithm ECDSAP256SHA256
	Found 1 RRSIGs over DS RRset
	`ch. 86400 IN RRSIG ( DS 8 1 86400 20260212230000 20260130220000 21831 . OonZ0VQ+BKgjXIKzbla1zdzAmlno51aSHFKFlZw9oz+j29bctPXDZlvwBZ0UZ8xKbPWHNN003oMq zsLuEDB0qgshOeMGhsRD1hjlGrROzt52MVvzw+m6colo62GyQ6V0JiwqLi8/zO1/OdBp3OVKpmEz mqXS8NWQv22w5KQBRMOBDl953HZI+ljkHsMXwRva2lVg4zxMl0XLmwEB70fdnZSeuofA8R5N0qxf PxM4cT4AVmKDpmLJmoHiavbi2yly/GiKt3f3GRtOCbgL2jYEMo9VcnSbAhli3Aw4WInTB22XSO4I BfdS/wZfGPbmZESLePIcQks378fNRc/KD6yNWA== )`
	RRSIG=21831 and DNSKEY=21831 verifies the DS RRset
	DS=58745/SHA-256 is now in the chain-of-trust
	`ch. 86400 IN DS ( 58745 13 2 083ed7735a6aad21d51cb0af5c485055602b392435e92b2c13614a6bc8d46b92 )`
	Query to b.nic.ch for ch/DNSKEY
	Received 369 bytes from 130.59.31.43
	;; Response received from [130.59.31.43] 369 octets ;; HEADER SECTION ;; id = 33056 ;; 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": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; ch. IN DNSKEY ;; ANSWER SECTION (4 records) ch. 86400 IN DNSKEY ( 256 3 13 dn+qB5+CAMs/2VXPgDacE6nNaiHkw0fIJPpaRAtl9W4NmOy2wTbzkjCiOubi3v6GFY4zDu+4fvx/ Vo5BOS6TDw== ) ; keytag 50320 ch. 86400 IN DNSKEY ( 256 3 13 o00lwU14NERFJz3HobkySSm2RCfMJ1gFxwXq1c4xAvII8KXqhjw43AGbIhU77rGGm/OINb5Nzxo8 VSLIS/ky0w== ) ; keytag 51559 ch. 86400 IN DNSKEY ( 257 3 13 af3VgrsVYa6Jm3d1lwsoCAEqQbeNpLUJ5kHjkUksCCPvubXuPEwTJGDUUbw9QRJtm6lBIAjbjtAc cGemAgcyZQ== ) ; keytag 58745 ch. 86400 IN RRSIG ( DNSKEY 13 1 86400 20260228100909 20260113090909 58745 ch. 8NDMu30D8ob3X/2vl0p4uHF/q+YaO3tjZGiZ7HSgvyZnYJPpsF855xWoVhjSnBh/+spqpy8SV45Y 95QEOKYOlA== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 3 DNSKEY records for ch
	`ch. 86400 IN DNSKEY ( 256 3 13 dn+qB5+CAMs/2VXPgDacE6nNaiHkw0fIJPpaRAtl9W4NmOy2wTbzkjCiOubi3v6GFY4zDu+4fvx/ Vo5BOS6TDw== ) ; keytag 50320`
	`ch. 86400 IN DNSKEY ( 256 3 13 o00lwU14NERFJz3HobkySSm2RCfMJ1gFxwXq1c4xAvII8KXqhjw43AGbIhU77rGGm/OINb5Nzxo8 VSLIS/ky0w== ) ; keytag 51559`
	`ch. 86400 IN DNSKEY ( 257 3 13 af3VgrsVYa6Jm3d1lwsoCAEqQbeNpLUJ5kHjkUksCCPvubXuPEwTJGDUUbw9QRJtm6lBIAjbjtAc cGemAgcyZQ== ) ; keytag 58745`
	DNSKEY=58745/SEP is now in the chain-of-trust
	DS=58745/SHA-256 verifies DNSKEY=58745/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`ch. 86400 IN RRSIG ( DNSKEY 13 1 86400 20260228100909 20260113090909 58745 ch. 8NDMu30D8ob3X/2vl0p4uHF/q+YaO3tjZGiZ7HSgvyZnYJPpsF855xWoVhjSnBh/+spqpy8SV45Y 95QEOKYOlA== )`
	RRSIG=58745 and DNSKEY=58745/SEP verifies the DNSKEY RRset
	DNSKEY=50320 is now in the chain-of-trust
	DNSKEY=51559 is now in the chain-of-trust
	Query to a.nic.ch for epfl.ch/A
	Received 374 bytes from 130.59.31.41
	;; Response received from [130.59.31.41] 374 octets ;; HEADER SECTION ;; id = 63569 ;; 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 = 5 arcount = 7 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; epfl.ch. IN A ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (5 records) epfl.ch. 3600 IN NS stisun1.epfl.ch. epfl.ch. 3600 IN NS stisun2.epfl.ch. epfl.ch. 3600 IN NS scsnms.switch.ch. epfl.ch. 900 IN NSEC epfl-africa.ch. NS RRSIG NSEC epfl.ch. 900 IN RRSIG ( NSEC 13 2 900 20260217032825 20260118030218 50320 ch. 7B+x5VO6dImMYgZLZ8bSi557x/uZGlZ9FF49+cT1uHwjqyM5O/qRdHUHiP7ZeHkHsxTqVPe+hoHw N3NrYiRzeA== ) ;; ADDITIONAL SECTION (7 records) stisun1.epfl.ch. 3600 IN A 128.178.15.8 stisun2.epfl.ch. 3600 IN A 128.178.15.7 scsnms.switch.ch. 3600 IN A 130.59.31.26 stisun1.epfl.ch. 3600 IN AAAA 2001:620:618:10f:1:80b2:f08:1 stisun2.epfl.ch. 3600 IN AAAA 2001:620:618:10f:1:80b2:f07:1 scsnms.switch.ch. 3600 IN AAAA 2001:620:0:ff::a7 ;; { "EDNS-VERSION": 0 }
	Query to d.nic.ch for epfl.ch/DNSKEY
	Received 374 bytes from 194.0.25.39
	;; Response received from [194.0.25.39] 374 octets ;; HEADER SECTION ;; id = 31245 ;; 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 = 5 arcount = 7 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1400, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; epfl.ch. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (5 records) epfl.ch. 3600 IN NS scsnms.switch.ch. epfl.ch. 3600 IN NS stisun1.epfl.ch. epfl.ch. 3600 IN NS stisun2.epfl.ch. epfl.ch. 900 IN NSEC epfl-africa.ch. NS RRSIG NSEC epfl.ch. 900 IN RRSIG ( NSEC 13 2 900 20260217032825 20260118030218 50320 ch. 7B+x5VO6dImMYgZLZ8bSi557x/uZGlZ9FF49+cT1uHwjqyM5O/qRdHUHiP7ZeHkHsxTqVPe+hoHw N3NrYiRzeA== ) ;; ADDITIONAL SECTION (7 records) scsnms.switch.ch. 3600 IN A 130.59.31.26 stisun1.epfl.ch. 3600 IN A 128.178.15.8 stisun2.epfl.ch. 3600 IN A 128.178.15.7 scsnms.switch.ch. 3600 IN AAAA 2001:620:0:ff::a7 stisun1.epfl.ch. 3600 IN AAAA 2001:620:618:10f:1:80b2:f08:1 stisun2.epfl.ch. 3600 IN AAAA 2001:620:618:10f:1:80b2:f07:1 ;; { "EDNS-VERSION": 0 }
	Found child zone epfl.ch

epfl.ch

	Checking DS between ch and epfl.ch
	Query to d.nic.ch for epfl.ch/DS
	Received 331 bytes from 194.0.25.39
	;; Response received from [194.0.25.39] 331 octets ;; HEADER SECTION ;; id = 21220 ;; 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 = 0 ;; nscount = 4 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1400, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; epfl.ch. IN DS ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (4 records) ch. 900 IN SOA ( a.nic.ch. dns-operation.switch.ch. 2026013105 ;serial 900 ;refresh 600 ;retry 1209600 ;expire 900 ;minimum ) ch. 900 IN RRSIG ( SOA 13 1 900 20260302032411 20260131030219 50320 ch. V7zHmgepw/fOrU3Lpwk3BmvkJqA8+sCGhkMZdE7NF6ZOnmTX4uZCQJFHwwfHgp9IaPKD1/CcMN6k 47E3/YOQpw== ) epfl.ch. 900 IN NSEC epfl-africa.ch. NS RRSIG NSEC epfl.ch. 900 IN RRSIG ( NSEC 13 2 900 20260217032825 20260118030218 50320 ch. 7B+x5VO6dImMYgZLZ8bSi557x/uZGlZ9FF49+cT1uHwjqyM5O/qRdHUHiP7ZeHkHsxTqVPe+hoHw N3NrYiRzeA== ) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	No DS records found for epfl.ch in the ch zone
	Query to scsnms.switch.ch for epfl.ch/DNSKEY
	Received 90 bytes from 130.59.31.26
	;; Response received from [130.59.31.26] 90 octets ;; HEADER SECTION ;; id = 57663 ;; 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 = 0 ;; nscount = 1 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; epfl.ch. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (1 record) epfl.ch. 3600 IN SOA ( stisun1.epfl.ch. dnsmaster.epfl.ch. 79748435 ;serial 1200 ;refresh 450 ;retry 3600000 ;expire 3600 ;minimum ) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	No DNSKEY records found
	Query to scsnms.switch.ch for epfl.ch/A
	Received 52 bytes from 130.59.31.26
	;; Response received from [130.59.31.26] 52 octets ;; HEADER SECTION ;; id = 45720 ;; 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 = 1 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; epfl.ch. IN A ;; ANSWER SECTION (1 record) epfl.ch. 86400 IN A 128.178.211.3 ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	scsnms.switch.ch is authoritative for epfl.ch
	Query to stisun1.epfl.ch for epfl.ch/SOA
	Received 244 bytes from 128.178.15.8
	;; Response received from [128.178.15.8] 244 octets ;; HEADER SECTION ;; id = 43651 ;; 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 = 1 ;; nscount = 3 arcount = 5 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; epfl.ch. IN SOA ;; ANSWER SECTION (1 record) epfl.ch. 86400 IN SOA ( stisun1.epfl.ch. dnsmaster.epfl.ch. 79748435 ;serial 1200 ;refresh 450 ;retry 3600000 ;expire 3600 ;minimum ) ;; AUTHORITY SECTION (3 records) epfl.ch. 86400 IN NS stisun2.epfl.ch. epfl.ch. 86400 IN NS scsnms.switch.ch. epfl.ch. 86400 IN NS stisun1.epfl.ch. ;; ADDITIONAL SECTION (5 records) stisun1.epfl.ch. 86400 IN A 128.178.15.8 stisun2.epfl.ch. 86400 IN A 128.178.15.7 stisun1.epfl.ch. 86400 IN AAAA 2001:620:618:10f:1:80b2:f08:1 stisun2.epfl.ch. 86400 IN AAAA 2001:620:618:10f:1:80b2:f07:1 ;; { "EDNS-VERSION": 0 }
	Query to stisun2.epfl.ch for epfl.ch/SOA
	Received 244 bytes from 128.178.15.7
	;; Response received from [128.178.15.7] 244 octets ;; HEADER SECTION ;; id = 34647 ;; 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 = 1 ;; nscount = 3 arcount = 5 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; epfl.ch. IN SOA ;; ANSWER SECTION (1 record) epfl.ch. 86400 IN SOA ( stisun1.epfl.ch. dnsmaster.epfl.ch. 79748435 ;serial 1200 ;refresh 450 ;retry 3600000 ;expire 3600 ;minimum ) ;; AUTHORITY SECTION (3 records) epfl.ch. 86400 IN NS stisun1.epfl.ch. epfl.ch. 86400 IN NS stisun2.epfl.ch. epfl.ch. 86400 IN NS scsnms.switch.ch. ;; ADDITIONAL SECTION (5 records) stisun1.epfl.ch. 86400 IN A 128.178.15.8 stisun2.epfl.ch. 86400 IN A 128.178.15.7 stisun1.epfl.ch. 86400 IN AAAA 2001:620:618:10f:1:80b2:f08:1 stisun2.epfl.ch. 86400 IN AAAA 2001:620:618:10f:1:80b2:f07:1 ;; { "EDNS-VERSION": 0 }
	Query to scsnms.switch.ch for epfl.ch/A
	Received 52 bytes from 130.59.31.26
	;; Response received from [130.59.31.26] 52 octets ;; HEADER SECTION ;; id = 58964 ;; 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 = 1 ;; nscount = 0 arcount = 1 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; epfl.ch. IN A ;; ANSWER SECTION (1 record) epfl.ch. 86400 IN A 128.178.211.3 ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	epfl.ch A RR has value 128.178.211.3
	No RRSIGs found

epfl.ch

	Query to stisun1.epfl.ch for epfl.ch/A
	Received 214 bytes from 128.178.15.8
	;; Response received from [128.178.15.8] 214 octets ;; HEADER SECTION ;; id = 51317 ;; 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 = 1 ;; nscount = 3 arcount = 5 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; epfl.ch. IN A ;; ANSWER SECTION (1 record) epfl.ch. 86400 IN A 128.178.211.3 ;; AUTHORITY SECTION (3 records) epfl.ch. 86400 IN NS stisun1.epfl.ch. epfl.ch. 86400 IN NS stisun2.epfl.ch. epfl.ch. 86400 IN NS scsnms.switch.ch. ;; ADDITIONAL SECTION (5 records) stisun1.epfl.ch. 86400 IN A 128.178.15.8 stisun2.epfl.ch. 86400 IN A 128.178.15.7 stisun1.epfl.ch. 86400 IN AAAA 2001:620:618:10f:1:80b2:f08:1 stisun2.epfl.ch. 86400 IN AAAA 2001:620:618:10f:1:80b2:f07:1 ;; { "EDNS-VERSION": 0 }
	stisun1.epfl.ch is authoritative for epfl.ch
	Query to stisun1.epfl.ch for epfl.ch/A
	Received 214 bytes from 128.178.15.8
	;; Response received from [128.178.15.8] 214 octets ;; HEADER SECTION ;; id = 13231 ;; 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 = 1 ;; nscount = 3 arcount = 5 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; epfl.ch. IN A ;; ANSWER SECTION (1 record) epfl.ch. 86400 IN A 128.178.211.3 ;; AUTHORITY SECTION (3 records) epfl.ch. 86400 IN NS stisun2.epfl.ch. epfl.ch. 86400 IN NS scsnms.switch.ch. epfl.ch. 86400 IN NS stisun1.epfl.ch. ;; ADDITIONAL SECTION (5 records) stisun1.epfl.ch. 86400 IN A 128.178.15.8 stisun2.epfl.ch. 86400 IN A 128.178.15.7 stisun1.epfl.ch. 86400 IN AAAA 2001:620:618:10f:1:80b2:f08:1 stisun2.epfl.ch. 86400 IN AAAA 2001:620:618:10f:1:80b2:f07:1 ;; { "EDNS-VERSION": 0 }
	epfl.ch A RR has value 128.178.211.3
	No RRSIGs found

epfl.ch

	Query to stisun2.epfl.ch for epfl.ch/A
	Received 214 bytes from 128.178.15.7
	;; Response received from [128.178.15.7] 214 octets ;; HEADER SECTION ;; id = 26658 ;; 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 = 1 ;; nscount = 3 arcount = 5 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; epfl.ch. IN A ;; ANSWER SECTION (1 record) epfl.ch. 86400 IN A 128.178.211.3 ;; AUTHORITY SECTION (3 records) epfl.ch. 86400 IN NS stisun1.epfl.ch. epfl.ch. 86400 IN NS stisun2.epfl.ch. epfl.ch. 86400 IN NS scsnms.switch.ch. ;; ADDITIONAL SECTION (5 records) stisun1.epfl.ch. 86400 IN A 128.178.15.8 stisun2.epfl.ch. 86400 IN A 128.178.15.7 stisun1.epfl.ch. 86400 IN AAAA 2001:620:618:10f:1:80b2:f08:1 stisun2.epfl.ch. 86400 IN AAAA 2001:620:618:10f:1:80b2:f07:1 ;; { "EDNS-VERSION": 0 }
	stisun2.epfl.ch is authoritative for epfl.ch
	Query to stisun2.epfl.ch for epfl.ch/A
	Received 214 bytes from 128.178.15.7
	;; Response received from [128.178.15.7] 214 octets ;; HEADER SECTION ;; id = 19485 ;; 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 = 1 ;; nscount = 3 arcount = 5 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; epfl.ch. IN A ;; ANSWER SECTION (1 record) epfl.ch. 86400 IN A 128.178.211.3 ;; AUTHORITY SECTION (3 records) epfl.ch. 86400 IN NS stisun1.epfl.ch. epfl.ch. 86400 IN NS scsnms.switch.ch. epfl.ch. 86400 IN NS stisun2.epfl.ch. ;; ADDITIONAL SECTION (5 records) stisun1.epfl.ch. 86400 IN A 128.178.15.8 stisun2.epfl.ch. 86400 IN A 128.178.15.7 stisun1.epfl.ch. 86400 IN AAAA 2001:620:618:10f:1:80b2:f08:1 stisun2.epfl.ch. 86400 IN AAAA 2001:620:618:10f:1:80b2:f07:1 ;; { "EDNS-VERSION": 0 }
	epfl.ch A RR has value 128.178.211.3
	No RRSIGs found

Move your mouse over any or symbols for remediation hints.

Want a second opinion? Test epfl.ch at dnsviz.net.

DNSSEC Debugger

↓ Advanced options ↑ Advanced options

Trust Anchor:
Name Servers: