DNSSEC Debugger

Domain Name:

Time: 2026-03-22 09:04:32 UTC

Analyzing DNSSEC problems for cvut.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 g.root-servers.net for ./DNSKEY
	Received 1141 bytes from 192.112.36.4
	;; Response received from [192.112.36.4] 1141 octets ;; HEADER SECTION ;; id = 26341 ;; 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) ;; . IN DNSKEY ;; ANSWER SECTION (4 records) . 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 AwEAAbNTVC2+pry4pc37pZI9Oj6b8FHxT3VGrvSPKLE1Tjyfe2kUZUtVX5xrv6AV4BVO+ygrYjGZ MNgEnbLU4zknnlnhI2e0g6iTza1aZh0dRZXGH16C1NUNq1CxBkUhIYQhQDeIOtLacx+RmFTc+hSH JJ2MJ79IS00kA7eKi6mofQ7SPJmdJVjI+JAx791y0f5QaB+iHGANU53FwiYXNUQjfAzCrtOaSevG sx8SO8BTaXLAjFq5eewOtwScVwfVDhEXlvpE6e+mIncwhNKaMRD9IPuHENqCNPI5MjxfAMVS6cEY 8eEozIkv/vHc+0Auu3n+Fcx6F2Js4KPXaHEShAXugfU= ) ; keytag 21831 . 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 20260402000000 20260312000000 20326 . hcmCK2q88XH00Hynv8IgIMVTKrwyb8Lh/uvRpqBPMALNQunyrS+VKrlKb6rBQTFnGHeVR/jj3Eay Uuxv4fy2evliMYKLrfTHtdqD3oUvJMnwmxEMmhS84Ttw+bbTcHeYxb52NFiYVHKb37Y0OWN4lr0p V+3fwFtWumb1NlWZDMNsaHFv6UIdxgUGNBVEyUaTAK6E2jseQcoqv6A0rNxCG+xtz2zSpRV2JM1g dC8zVAcc068OamqrwZlzKqsqAgXP78NOERrFkzffoRaSEmOORcAQpUdCK265DL1Y7Xeq0QaNEKd2 fXglm/IxS+4sMPT+83Q/XasxUu5C3d0qEz76fw== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 3 DNSKEY records for .
	`. 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 AwEAAbNTVC2+pry4pc37pZI9Oj6b8FHxT3VGrvSPKLE1Tjyfe2kUZUtVX5xrv6AV4BVO+ygrYjGZ MNgEnbLU4zknnlnhI2e0g6iTza1aZh0dRZXGH16C1NUNq1CxBkUhIYQhQDeIOtLacx+RmFTc+hSH JJ2MJ79IS00kA7eKi6mofQ7SPJmdJVjI+JAx791y0f5QaB+iHGANU53FwiYXNUQjfAzCrtOaSevG sx8SO8BTaXLAjFq5eewOtwScVwfVDhEXlvpE6e+mIncwhNKaMRD9IPuHENqCNPI5MjxfAMVS6cEY 8eEozIkv/vHc+0Auu3n+Fcx6F2Js4KPXaHEShAXugfU= ) ; keytag 21831`
	`. 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 20260402000000 20260312000000 20326 . hcmCK2q88XH00Hynv8IgIMVTKrwyb8Lh/uvRpqBPMALNQunyrS+VKrlKb6rBQTFnGHeVR/jj3Eay Uuxv4fy2evliMYKLrfTHtdqD3oUvJMnwmxEMmhS84Ttw+bbTcHeYxb52NFiYVHKb37Y0OWN4lr0p V+3fwFtWumb1NlWZDMNsaHFv6UIdxgUGNBVEyUaTAK6E2jseQcoqv6A0rNxCG+xtz2zSpRV2JM1g dC8zVAcc068OamqrwZlzKqsqAgXP78NOERrFkzffoRaSEmOORcAQpUdCK265DL1Y7Xeq0QaNEKd2 fXglm/IxS+4sMPT+83Q/XasxUu5C3d0qEz76fw== )`
	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 g.root-servers.net for cvut.cz/A
	Received 620 bytes from 192.112.36.4
	;; Response received from [192.112.36.4] 620 octets ;; HEADER SECTION ;; id = 25887 ;; 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) ;; cvut.cz. IN A ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (6 records) cz. 172800 IN NS d.ns.nic.cz. cz. 172800 IN NS b.ns.nic.cz. cz. 172800 IN NS a.ns.nic.cz. cz. 172800 IN NS c.ns.nic.cz. cz. 86400 IN DS ( 20237 13 2 cff0f3ecdbc529c1f0031ba1840bfb835853b9209ed1e508fff48451d7b778e2 ) cz. 86400 IN RRSIG ( DS 8 1 86400 20260403170000 20260321160000 21831 . mV6iiPlq0cM12z+SU9GrZ+sdTQJdyrbR/mu6zwtGYSZQXP4pXez9Ydu9Qj/cM/NWVZCOHMHJgHxn ip8QH617rH+M6//WtHLECTZiZ9Iarc4DViINuR4MWpMdQf2w7nHApdO0UGk6eXN8S5+RqQCfcI4D qeU2zBksrWxOY0BouI9TJyethYfJC/AMaSvyepoVDoatA1jaS7/19OtWNiGLElOgd1HW3UJP8B3h 5Kv7L6o/UjQbs6CAamkS68uM2fGjI16iVbydlYv4/18rAphFdWHmPZICfnBZ5Rh3iPSCTO727Eh0 haNIfV8J+hs3za0ISWPnyVmAGH72uvnmLisLhQ== ) ;; 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 }
	Query to d.root-servers.net for cz/DNSKEY
	Received 613 bytes from 199.7.91.13
	;; Response received from [199.7.91.13] 613 octets ;; HEADER SECTION ;; id = 6123 ;; 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": 1450, ;; "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 20260403170000 20260321160000 21831 . mV6iiPlq0cM12z+SU9GrZ+sdTQJdyrbR/mu6zwtGYSZQXP4pXez9Ydu9Qj/cM/NWVZCOHMHJgHxn ip8QH617rH+M6//WtHLECTZiZ9Iarc4DViINuR4MWpMdQf2w7nHApdO0UGk6eXN8S5+RqQCfcI4D qeU2zBksrWxOY0BouI9TJyethYfJC/AMaSvyepoVDoatA1jaS7/19OtWNiGLElOgd1HW3UJP8B3h 5Kv7L6o/UjQbs6CAamkS68uM2fGjI16iVbydlYv4/18rAphFdWHmPZICfnBZ5Rh3iPSCTO727Eh0 haNIfV8J+hs3za0ISWPnyVmAGH72uvnmLisLhQ== ) ;; 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 }
	Found child zone cz

	Checking DS between . and cz
	Query to k.root-servers.net for cz/DS
	Received 366 bytes from 193.0.14.129
	;; Response received from [193.0.14.129] 366 octets ;; HEADER SECTION ;; id = 19379 ;; 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 20260403170000 20260321160000 21831 . mV6iiPlq0cM12z+SU9GrZ+sdTQJdyrbR/mu6zwtGYSZQXP4pXez9Ydu9Qj/cM/NWVZCOHMHJgHxn ip8QH617rH+M6//WtHLECTZiZ9Iarc4DViINuR4MWpMdQf2w7nHApdO0UGk6eXN8S5+RqQCfcI4D qeU2zBksrWxOY0BouI9TJyethYfJC/AMaSvyepoVDoatA1jaS7/19OtWNiGLElOgd1HW3UJP8B3h 5Kv7L6o/UjQbs6CAamkS68uM2fGjI16iVbydlYv4/18rAphFdWHmPZICfnBZ5Rh3iPSCTO727Eh0 haNIfV8J+hs3za0ISWPnyVmAGH72uvnmLisLhQ== ) ;; 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 20260403170000 20260321160000 21831 . mV6iiPlq0cM12z+SU9GrZ+sdTQJdyrbR/mu6zwtGYSZQXP4pXez9Ydu9Qj/cM/NWVZCOHMHJgHxn ip8QH617rH+M6//WtHLECTZiZ9Iarc4DViINuR4MWpMdQf2w7nHApdO0UGk6eXN8S5+RqQCfcI4D qeU2zBksrWxOY0BouI9TJyethYfJC/AMaSvyepoVDoatA1jaS7/19OtWNiGLElOgd1HW3UJP8B3h 5Kv7L6o/UjQbs6CAamkS68uM2fGjI16iVbydlYv4/18rAphFdWHmPZICfnBZ5Rh3iPSCTO727Eh0 haNIfV8J+hs3za0ISWPnyVmAGH72uvnmLisLhQ== )`
	RRSIG=21831 and DNSKEY=21831 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 a.ns.nic.cz for cz/DNSKEY
	Received 289 bytes from 194.0.12.1
	;; Response received from [194.0.12.1] 289 octets ;; HEADER SECTION ;; id = 64962 ;; 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 /QZiUtsFBvYTYpm5h79iYeRGrGkKn5aUijLbACd0gyZFnGOyU4pJKimxchG+a3yBCkwa5+7rHwSG /KoeXPOMSQ== ) ; keytag 34943 cz. 3600 IN DNSKEY ( 257 3 13 nqzH7xP1QU5UOVy/VvxFSlrB/XgX9JDJzj51PzIj35TXjZTyalTlAT/f7PAfaSD5mEG1N8Vk9NmI 2nxgQqhzDQ== ) ; keytag 20237 cz. 3600 IN RRSIG ( DNSKEY 13 1 3600 20260402002134 20260318225134 20237 cz. GmtmBVnpEoLKfm2533ESjx4itMPoPpyZd8APNFR8xNGIGeD68BsUuy5m3qg9PV0f88oQQh4HAcJC s2MnORit7w== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 2 DNSKEY records for cz
	`cz. 3600 IN DNSKEY ( 256 3 13 /QZiUtsFBvYTYpm5h79iYeRGrGkKn5aUijLbACd0gyZFnGOyU4pJKimxchG+a3yBCkwa5+7rHwSG /KoeXPOMSQ== ) ; keytag 34943`
	`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 20260402002134 20260318225134 20237 cz. GmtmBVnpEoLKfm2533ESjx4itMPoPpyZd8APNFR8xNGIGeD68BsUuy5m3qg9PV0f88oQQh4HAcJC s2MnORit7w== )`
	RRSIG=20237 and DNSKEY=20237/SEP verifies the DNSKEY RRset
	DNSKEY=34943 is now in the chain-of-trust
	Query to b.ns.nic.cz for cvut.cz/A
	Received 305 bytes from 194.0.13.1
	;; Response received from [194.0.13.1] 305 octets ;; HEADER SECTION ;; id = 15606 ;; 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 = 4 arcount = 5 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN A ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (4 records) cvut.cz. 3600 IN NS ns.cvut.cz. cvut.cz. 3600 IN NS nss.cvut.cz. cvut.cz. 3600 IN DS ( 41860 13 2 2311d5df154638befa68b593c52e6b6c72060e33ff020392fa527b1f4c3bf3b3 ) cvut.cz. 3600 IN RRSIG ( DS 13 2 3600 20260325194720 20260311181720 34943 cz. V26/e5m3iZk3LvK8EzZBt8/hqyZKZ/tQ1Uigoc16/jInH4yZQHIKaTgzZ0ZSCGNj9XqqFZsA3WGe ff1CGdzV7w== ) ;; ADDITIONAL SECTION (5 records) ns.cvut.cz. 3600 IN A 147.32.1.20 ns.cvut.cz. 3600 IN AAAA 2001:718:2:2200::100 nss.cvut.cz. 3600 IN A 147.32.1.9 nss.cvut.cz. 3600 IN AAAA 2001:718:2:2200::101 ;; { "EDNS-VERSION": 0 }
	Query to c.ns.nic.cz for cvut.cz/DNSKEY
	Received 305 bytes from 194.0.14.1
	;; Response received from [194.0.14.1] 305 octets ;; HEADER SECTION ;; id = 20955 ;; 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 = 4 arcount = 5 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (4 records) cvut.cz. 3600 IN NS ns.cvut.cz. cvut.cz. 3600 IN NS nss.cvut.cz. cvut.cz. 3600 IN DS ( 41860 13 2 2311d5df154638befa68b593c52e6b6c72060e33ff020392fa527b1f4c3bf3b3 ) cvut.cz. 3600 IN RRSIG ( DS 13 2 3600 20260325194720 20260311181720 34943 cz. V26/e5m3iZk3LvK8EzZBt8/hqyZKZ/tQ1Uigoc16/jInH4yZQHIKaTgzZ0ZSCGNj9XqqFZsA3WGe ff1CGdzV7w== ) ;; ADDITIONAL SECTION (5 records) ns.cvut.cz. 3600 IN A 147.32.1.20 nss.cvut.cz. 3600 IN A 147.32.1.9 ns.cvut.cz. 3600 IN AAAA 2001:718:2:2200::100 nss.cvut.cz. 3600 IN AAAA 2001:718:2:2200::101 ;; { "EDNS-VERSION": 0 }
	Found child zone cvut.cz

cvut.cz

	Checking DS between cz and cvut.cz
	Query to a.ns.nic.cz for cvut.cz/DS
	Received 182 bytes from 194.0.12.1
	;; Response received from [194.0.12.1] 182 octets ;; HEADER SECTION ;; id = 36734 ;; 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) ;; cvut.cz. IN DS ;; ANSWER SECTION (2 records) cvut.cz. 3600 IN DS ( 41860 13 2 2311d5df154638befa68b593c52e6b6c72060e33ff020392fa527b1f4c3bf3b3 ) cvut.cz. 3600 IN RRSIG ( DS 13 2 3600 20260325194720 20260311181720 34943 cz. V26/e5m3iZk3LvK8EzZBt8/hqyZKZ/tQ1Uigoc16/jInH4yZQHIKaTgzZ0ZSCGNj9XqqFZsA3WGe ff1CGdzV7w== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 1 DS records for cvut.cz in the cz zone
	DS=41860/SHA-256 has algorithm ECDSAP256SHA256
	Found 1 RRSIGs over DS RRset
	`cvut.cz. 3600 IN RRSIG ( DS 13 2 3600 20260325194720 20260311181720 34943 cz. V26/e5m3iZk3LvK8EzZBt8/hqyZKZ/tQ1Uigoc16/jInH4yZQHIKaTgzZ0ZSCGNj9XqqFZsA3WGe ff1CGdzV7w== )`
	RRSIG=34943 and DNSKEY=34943 verifies the DS RRset
	DS=41860/SHA-256 is now in the chain-of-trust
	`cvut.cz. 3600 IN DS ( 41860 13 2 2311d5df154638befa68b593c52e6b6c72060e33ff020392fa527b1f4c3bf3b3 )`
	Query to nss.cvut.cz for cvut.cz/DNSKEY
	Received 219 bytes from 147.32.1.9
	;; Response received from [147.32.1.9] 219 octets ;; HEADER SECTION ;; id = 9376 ;; 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) ;; cvut.cz. IN DNSKEY ;; ANSWER SECTION (2 records) cvut.cz. 6400 IN DNSKEY ( 257 3 13 +XkJfh9Fh5wGJVpntLyKQRXkrRQhP+kL3lnJ1SQfG3XTjW9WBBknfO37yynPQtat8S+kIuOJZaSg kLmMfS8drQ== ) ; keytag 41860 cvut.cz. 6400 IN RRSIG ( DNSKEY 13 2 6400 20260416102939 20260317094008 41860 cvut.cz. ZiGOOuV7bcbgsYxW229WOo8vmQJ7L1/bhaD9EKR6gX+qUYB699UdNpZYzv0DegRy/cqBn8CDBzl4 0c0L7t7h3A== ) ;; AUTHORITY SECTION (0 records) ;; ADDITIONAL SECTION (1 record) ;; { "EDNS-VERSION": 0 }
	Found 1 DNSKEY records for cvut.cz
	`cvut.cz. 6400 IN DNSKEY ( 257 3 13 +XkJfh9Fh5wGJVpntLyKQRXkrRQhP+kL3lnJ1SQfG3XTjW9WBBknfO37yynPQtat8S+kIuOJZaSg kLmMfS8drQ== ) ; keytag 41860`
	DNSKEY=41860/SEP is now in the chain-of-trust
	DS=41860/SHA-256 verifies DNSKEY=41860/SEP
	Found 1 RRSIGs over DNSKEY RRset
	`cvut.cz. 6400 IN RRSIG ( DNSKEY 13 2 6400 20260416102939 20260317094008 41860 cvut.cz. ZiGOOuV7bcbgsYxW229WOo8vmQJ7L1/bhaD9EKR6gX+qUYB699UdNpZYzv0DegRy/cqBn8CDBzl4 0c0L7t7h3A== )`
	RRSIG=41860 and DNSKEY=41860/SEP verifies the DNSKEY RRset
	Query to ns.cvut.cz for cvut.cz/A
	Received 793 bytes from 147.32.1.20
	;; Response received from [147.32.1.20] 793 octets ;; HEADER SECTION ;; id = 24835 ;; 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 = 3 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN A ;; ANSWER SECTION (2 records) cvut.cz. 6400 IN A 147.32.3.202 cvut.cz. 6400 IN RRSIG ( A 13 2 6400 20260330023938 20260304203425 41860 cvut.cz. EXhZUySdu9QoXeDgZz09UR0eDJIiDoU5QVhYs3AY9L6EbzuUMa4R0iCYHo+sEgdgmm3f06j8L0Xw FfUIOU1PcQ== ) ;; AUTHORITY SECTION (3 records) cvut.cz. 6400 IN NS nss.cvut.cz. cvut.cz. 6400 IN NS ns.cvut.cz. cvut.cz. 6400 IN RRSIG ( NS 13 2 6400 20260330023938 20260304203425 41860 cvut.cz. wengawgWBkc3D+gqHxIWxdWKYwx4eT27MBL3L58Sum/4Wq2/6eq8kOn2DqX/Y6vw/IwyIC0cSwB0 4pVNyl5P4A== ) ;; ADDITIONAL SECTION (9 records) ns.cvut.cz. 6400 IN A 147.32.1.20 nss.cvut.cz. 6400 IN A 147.32.1.9 ns.cvut.cz. 6400 IN AAAA 2001:718:2:2200::100 nss.cvut.cz. 6400 IN AAAA 2001:718:2:2200::101 ns.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. tZ5mXyIRDBBLWxQF4TcX6gC5148pL7sDYNIpkPOtIk/J+1hi+TH379sEa95zsZHp9VWK6SfhwJ5F asOWxX5mrg== ) ns.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. l4sDeCct5VzaScNcxszPgSO5ECsUW6Hipi22MEWoDvrre6pe6I8F/+x2BxuCah3Y97/8B3qlDlcE CARaG9IyDQ== ) nss.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. AYifjvMhdJi1sKcUTKXJLt8i0zEBtBGVTQBk3aHXZ8HhCi6GPcOa9afxnH+hnmsDGGAqQ1sfyPep xR1buFKiYg== ) nss.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. DxWOVy+9aZeE2LVZv13Y9I4XCgJYZms5atmljQkLobsmwWZXiPbZC7R08dts1G58oysgoV3xAqr3 lwegg3NRfQ== ) ;; { "EDNS-VERSION": 0 }
	ns.cvut.cz is authoritative for cvut.cz
	Found RRSIG signed by cvut.cz zone
	Query to nss.cvut.cz for cvut.cz/SOA
	Received 824 bytes from 147.32.1.9
	;; Response received from [147.32.1.9] 824 octets ;; HEADER SECTION ;; id = 24807 ;; 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 = 3 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN SOA ;; ANSWER SECTION (2 records) cvut.cz. 6400 IN SOA ( ns.cvut.cz. hostmaster.cvut.cz. 12346 ;serial 14401 ;refresh 3600 ;retry 1209600 ;expire 86400 ;minimum ) cvut.cz. 6400 IN RRSIG ( SOA 13 2 6400 20260416104008 20260317094008 41860 cvut.cz. nVPUbVyCTY9rjsWQoiGh1pSyZWAE7BzJ2vQ/k2c2zmLpXl4DGKvsGoB2HisUaubOnOvXgNp5ZZph cdZCwx7EHw== ) ;; AUTHORITY SECTION (3 records) cvut.cz. 6400 IN NS nss.cvut.cz. cvut.cz. 6400 IN NS ns.cvut.cz. cvut.cz. 6400 IN RRSIG ( NS 13 2 6400 20260330023938 20260304203425 41860 cvut.cz. wengawgWBkc3D+gqHxIWxdWKYwx4eT27MBL3L58Sum/4Wq2/6eq8kOn2DqX/Y6vw/IwyIC0cSwB0 4pVNyl5P4A== ) ;; ADDITIONAL SECTION (9 records) ns.cvut.cz. 6400 IN A 147.32.1.20 nss.cvut.cz. 6400 IN A 147.32.1.9 ns.cvut.cz. 6400 IN AAAA 2001:718:2:2200::100 nss.cvut.cz. 6400 IN AAAA 2001:718:2:2200::101 ns.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. tZ5mXyIRDBBLWxQF4TcX6gC5148pL7sDYNIpkPOtIk/J+1hi+TH379sEa95zsZHp9VWK6SfhwJ5F asOWxX5mrg== ) ns.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. l4sDeCct5VzaScNcxszPgSO5ECsUW6Hipi22MEWoDvrre6pe6I8F/+x2BxuCah3Y97/8B3qlDlcE CARaG9IyDQ== ) nss.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. AYifjvMhdJi1sKcUTKXJLt8i0zEBtBGVTQBk3aHXZ8HhCi6GPcOa9afxnH+hnmsDGGAqQ1sfyPep xR1buFKiYg== ) nss.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. DxWOVy+9aZeE2LVZv13Y9I4XCgJYZms5atmljQkLobsmwWZXiPbZC7R08dts1G58oysgoV3xAqr3 lwegg3NRfQ== ) ;; { "EDNS-VERSION": 0 }
	Query to ns.cvut.cz for cvut.cz/A
	Received 793 bytes from 147.32.1.20
	;; Response received from [147.32.1.20] 793 octets ;; HEADER SECTION ;; id = 44706 ;; 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 = 3 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN A ;; ANSWER SECTION (2 records) cvut.cz. 6400 IN A 147.32.3.202 cvut.cz. 6400 IN RRSIG ( A 13 2 6400 20260330023938 20260304203425 41860 cvut.cz. EXhZUySdu9QoXeDgZz09UR0eDJIiDoU5QVhYs3AY9L6EbzuUMa4R0iCYHo+sEgdgmm3f06j8L0Xw FfUIOU1PcQ== ) ;; AUTHORITY SECTION (3 records) cvut.cz. 6400 IN NS nss.cvut.cz. cvut.cz. 6400 IN NS ns.cvut.cz. cvut.cz. 6400 IN RRSIG ( NS 13 2 6400 20260330023938 20260304203425 41860 cvut.cz. wengawgWBkc3D+gqHxIWxdWKYwx4eT27MBL3L58Sum/4Wq2/6eq8kOn2DqX/Y6vw/IwyIC0cSwB0 4pVNyl5P4A== ) ;; ADDITIONAL SECTION (9 records) ns.cvut.cz. 6400 IN A 147.32.1.20 nss.cvut.cz. 6400 IN A 147.32.1.9 ns.cvut.cz. 6400 IN AAAA 2001:718:2:2200::100 nss.cvut.cz. 6400 IN AAAA 2001:718:2:2200::101 ns.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. tZ5mXyIRDBBLWxQF4TcX6gC5148pL7sDYNIpkPOtIk/J+1hi+TH379sEa95zsZHp9VWK6SfhwJ5F asOWxX5mrg== ) ns.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. l4sDeCct5VzaScNcxszPgSO5ECsUW6Hipi22MEWoDvrre6pe6I8F/+x2BxuCah3Y97/8B3qlDlcE CARaG9IyDQ== ) nss.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. AYifjvMhdJi1sKcUTKXJLt8i0zEBtBGVTQBk3aHXZ8HhCi6GPcOa9afxnH+hnmsDGGAqQ1sfyPep xR1buFKiYg== ) nss.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. DxWOVy+9aZeE2LVZv13Y9I4XCgJYZms5atmljQkLobsmwWZXiPbZC7R08dts1G58oysgoV3xAqr3 lwegg3NRfQ== ) ;; { "EDNS-VERSION": 0 }
	cvut.cz A RR has value 147.32.3.202
	Found 1 RRSIGs over A RRset
	`cvut.cz. 6400 IN RRSIG ( A 13 2 6400 20260330023938 20260304203425 41860 cvut.cz. EXhZUySdu9QoXeDgZz09UR0eDJIiDoU5QVhYs3AY9L6EbzuUMa4R0iCYHo+sEgdgmm3f06j8L0Xw FfUIOU1PcQ== )`
	RRSIG=41860 and DNSKEY=41860/SEP verifies the A RRset

cvut.cz

	Query to nss.cvut.cz for cvut.cz/A
	Received 793 bytes from 147.32.1.9
	;; Response received from [147.32.1.9] 793 octets ;; HEADER SECTION ;; id = 40112 ;; 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 = 3 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN A ;; ANSWER SECTION (2 records) cvut.cz. 6400 IN A 147.32.3.202 cvut.cz. 6400 IN RRSIG ( A 13 2 6400 20260330023938 20260304203425 41860 cvut.cz. EXhZUySdu9QoXeDgZz09UR0eDJIiDoU5QVhYs3AY9L6EbzuUMa4R0iCYHo+sEgdgmm3f06j8L0Xw FfUIOU1PcQ== ) ;; AUTHORITY SECTION (3 records) cvut.cz. 6400 IN NS nss.cvut.cz. cvut.cz. 6400 IN NS ns.cvut.cz. cvut.cz. 6400 IN RRSIG ( NS 13 2 6400 20260330023938 20260304203425 41860 cvut.cz. wengawgWBkc3D+gqHxIWxdWKYwx4eT27MBL3L58Sum/4Wq2/6eq8kOn2DqX/Y6vw/IwyIC0cSwB0 4pVNyl5P4A== ) ;; ADDITIONAL SECTION (9 records) ns.cvut.cz. 6400 IN A 147.32.1.20 nss.cvut.cz. 6400 IN A 147.32.1.9 ns.cvut.cz. 6400 IN AAAA 2001:718:2:2200::100 nss.cvut.cz. 6400 IN AAAA 2001:718:2:2200::101 ns.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. tZ5mXyIRDBBLWxQF4TcX6gC5148pL7sDYNIpkPOtIk/J+1hi+TH379sEa95zsZHp9VWK6SfhwJ5F asOWxX5mrg== ) ns.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. l4sDeCct5VzaScNcxszPgSO5ECsUW6Hipi22MEWoDvrre6pe6I8F/+x2BxuCah3Y97/8B3qlDlcE CARaG9IyDQ== ) nss.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. AYifjvMhdJi1sKcUTKXJLt8i0zEBtBGVTQBk3aHXZ8HhCi6GPcOa9afxnH+hnmsDGGAqQ1sfyPep xR1buFKiYg== ) nss.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. DxWOVy+9aZeE2LVZv13Y9I4XCgJYZms5atmljQkLobsmwWZXiPbZC7R08dts1G58oysgoV3xAqr3 lwegg3NRfQ== ) ;; { "EDNS-VERSION": 0 }
	nss.cvut.cz is authoritative for cvut.cz
	Found RRSIG signed by cvut.cz zone
	Query to nss.cvut.cz for cvut.cz/A
	Received 793 bytes from 147.32.1.9
	;; Response received from [147.32.1.9] 793 octets ;; HEADER SECTION ;; id = 29161 ;; 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 = 3 arcount = 9 ;; { "EDNS-VERSION": 0, ;; "FLAGS": "8000", ;; "RCODE": 0, ;; "UDPSIZE": 1232, ;; "OPTIONS": [ ] ;; } ;; QUESTION SECTION (1 record) ;; cvut.cz. IN A ;; ANSWER SECTION (2 records) cvut.cz. 6400 IN A 147.32.3.202 cvut.cz. 6400 IN RRSIG ( A 13 2 6400 20260330023938 20260304203425 41860 cvut.cz. EXhZUySdu9QoXeDgZz09UR0eDJIiDoU5QVhYs3AY9L6EbzuUMa4R0iCYHo+sEgdgmm3f06j8L0Xw FfUIOU1PcQ== ) ;; AUTHORITY SECTION (3 records) cvut.cz. 6400 IN NS nss.cvut.cz. cvut.cz. 6400 IN NS ns.cvut.cz. cvut.cz. 6400 IN RRSIG ( NS 13 2 6400 20260330023938 20260304203425 41860 cvut.cz. wengawgWBkc3D+gqHxIWxdWKYwx4eT27MBL3L58Sum/4Wq2/6eq8kOn2DqX/Y6vw/IwyIC0cSwB0 4pVNyl5P4A== ) ;; ADDITIONAL SECTION (9 records) ns.cvut.cz. 6400 IN A 147.32.1.20 nss.cvut.cz. 6400 IN A 147.32.1.9 ns.cvut.cz. 6400 IN AAAA 2001:718:2:2200::100 nss.cvut.cz. 6400 IN AAAA 2001:718:2:2200::101 ns.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. tZ5mXyIRDBBLWxQF4TcX6gC5148pL7sDYNIpkPOtIk/J+1hi+TH379sEa95zsZHp9VWK6SfhwJ5F asOWxX5mrg== ) ns.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. l4sDeCct5VzaScNcxszPgSO5ECsUW6Hipi22MEWoDvrre6pe6I8F/+x2BxuCah3Y97/8B3qlDlcE CARaG9IyDQ== ) nss.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. AYifjvMhdJi1sKcUTKXJLt8i0zEBtBGVTQBk3aHXZ8HhCi6GPcOa9afxnH+hnmsDGGAqQ1sfyPep xR1buFKiYg== ) nss.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260330023938 20260304203425 41860 cvut.cz. DxWOVy+9aZeE2LVZv13Y9I4XCgJYZms5atmljQkLobsmwWZXiPbZC7R08dts1G58oysgoV3xAqr3 lwegg3NRfQ== ) ;; { "EDNS-VERSION": 0 }
	cvut.cz A RR has value 147.32.3.202
	Found 1 RRSIGs over A RRset
	`cvut.cz. 6400 IN RRSIG ( A 13 2 6400 20260330023938 20260304203425 41860 cvut.cz. EXhZUySdu9QoXeDgZz09UR0eDJIiDoU5QVhYs3AY9L6EbzuUMa4R0iCYHo+sEgdgmm3f06j8L0Xw FfUIOU1PcQ== )`
	RRSIG=41860 and DNSKEY=41860/SEP verifies the A RRset

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