DNSSEC Debugger

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Time: 2026-06-18 11:18:48 UTC

Analyzing DNSSEC problems for cvut.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 m.root-servers.net for ./DNSKEY
	Received 1141 bytes from 202.12.27.33
	;; Response received from [202.12.27.33] 1141 octets ;; HEADER SECTION ;; id = 40776 ;; 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 ( 257 3 8 AwEAAa96jeuknZlaeSrvyAJj6ZHv28hhOKkx3rLGXVaC6rXTsDc449/cidltpkyGwCJNnOAlFNKF 2jBosZBU5eeHspaQWOmOElZsjICMQMC3aeHbGiShvZsx4wMYSjH8e7Vrhbu6irwCzVBApESjbUdp WWmEnhathWu1jo+siFUiRAAxm9qyJNg/wOZqqzL/dL/q8PkcRU5oUKEpUge71M3ej2/7CPqpdVwu MoTvoB+ZOT4YeGyxMvHmbrxlFzGOHOijtzN+u1TQNatX2XBuzZNQ1K+s2CXkPIZo7s6JgZyvaBev YtxPvYLw4z9mR7K2vaF18UYH9Z9GNUUeayffKC73PYc= ) ; keytag 38696 . 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 RRSIG ( DNSKEY 8 0 172800 20260701000000 20260610000000 20326 . j4xwc5ju8Rar7jcd8yX1jGrb5c85D/uGNLvUpiKCzuSVqv0zhUS56KtqD0JmBo1rC+aWxywONWS6 o76i4p5TOOWFWdrops0E/Vw3OFQW+jLxsscc+Y9WUbK1PxTB3UPdWfiHw3azpvgsaaUdXAWeev5t MWZXcj4NM7NoCZJk9ig5onr298AVFZoFNZP6edyzWhyhkMX0DOxBH1M8+c8te2dFpck09pK2GEvA P5Cf1zlsGmZOiZRxB2mDLOXnCbqwJnHQSyhpW9QZkJGJbogrNPwMWdV+X3xcQ5n+dL9aRLtAkKeS p8FDo1ZeGo9xAbha9AjeCyPF3VkSRQEw9owjJg== ) ;; 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 ( 257 3 8 AwEAAa96jeuknZlaeSrvyAJj6ZHv28hhOKkx3rLGXVaC6rXTsDc449/cidltpkyGwCJNnOAlFNKF 2jBosZBU5eeHspaQWOmOElZsjICMQMC3aeHbGiShvZsx4wMYSjH8e7Vrhbu6irwCzVBApESjbUdp WWmEnhathWu1jo+siFUiRAAxm9qyJNg/wOZqqzL/dL/q8PkcRU5oUKEpUge71M3ej2/7CPqpdVwu MoTvoB+ZOT4YeGyxMvHmbrxlFzGOHOijtzN+u1TQNatX2XBuzZNQ1K+s2CXkPIZo7s6JgZyvaBev YtxPvYLw4z9mR7K2vaF18UYH9Z9GNUUeayffKC73PYc= ) ; keytag 38696`
	`. 172800 IN DNSKEY ( 256 3 8 AwEAAb5dDYffpgAJ8VUGLwQtWXPlQWsjIFJtCM00/XaKU+8ln+ofah3q2KxEIjvzQg+nqdxRj+8e mtPne1mtYcbFWP4Q9E+DniOJLK09R05FuzvGbrG7DDdRDUX/cedFdV7O8pFEAYpJqYNR9BCTIAV9 73DO2biauKSA31b7I2lK/woxoR1tf5cqJ4SMbJUviuHicAEoUi2ATswloZNWd5T5thmEFZnxFx7D 5UgKCY7oflS7+GU7dNJwEtmFnWYVETHN0kHXVz6aguouaAZp706YXNIoR/iTgQhmsR7XX+wL0Z8Q M2LxQIyU6vRZ06IyuJMGRMiwkSuGElbumyBt12JZbrU= ) ; keytag 54393`
	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 20260701000000 20260610000000 20326 . j4xwc5ju8Rar7jcd8yX1jGrb5c85D/uGNLvUpiKCzuSVqv0zhUS56KtqD0JmBo1rC+aWxywONWS6 o76i4p5TOOWFWdrops0E/Vw3OFQW+jLxsscc+Y9WUbK1PxTB3UPdWfiHw3azpvgsaaUdXAWeev5t MWZXcj4NM7NoCZJk9ig5onr298AVFZoFNZP6edyzWhyhkMX0DOxBH1M8+c8te2dFpck09pK2GEvA P5Cf1zlsGmZOiZRxB2mDLOXnCbqwJnHQSyhpW9QZkJGJbogrNPwMWdV+X3xcQ5n+dL9aRLtAkKeS p8FDo1ZeGo9xAbha9AjeCyPF3VkSRQEw9owjJg== )`
	RRSIG=20326 and DNSKEY=20326/SEP verifies the DNSKEY RRset
	DNSKEY=54393 is now in the chain-of-trust
	Query to m.root-servers.net for cvut.cz/A
	Received 620 bytes from 202.12.27.33
	;; Response received from [202.12.27.33] 620 octets ;; HEADER SECTION ;; id = 64329 ;; 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 b.ns.nic.cz. cz. 172800 IN NS d.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 20260701050000 20260618040000 54393 . Fby/HLJ88LM0Qch+WH0KZG7iUiy6rZdY1BsfWUHhSwldY+UM8nalzxrbg0jB6BxFHS3CWsNyBqbf WQ1v6sS7U2hvdDrQCwKGdplivCx/kI7XRP1tW/LYmt6PUwu3eWsKyfL9jfeD9ZRoas1nafuGKU4/ UJiqHmhxwM+MtOXb5qhyfCb/Vr1gY3x0YJEKalH1U9yO68H1jmWAw0265rxpuUwzwTbg4PhrrZj1 4Lwr4+UfVL7OsnihDsNsRfvXc0rt87UDXPVM+G6PSFM/9cH8hyIst+UtHAAnz1jYTU96uyHsV8qe 9arMbFAJcMgi+pzguh0u6p7oFNqpPH6a+oVfpg== ) ;; 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 a.root-servers.net for cz/DNSKEY
	Received 613 bytes from 198.41.0.4
	;; Response received from [198.41.0.4] 613 octets ;; HEADER SECTION ;; id = 22241 ;; 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) ;; cz. IN DNSKEY ;; ANSWER SECTION (0 records) ;; AUTHORITY SECTION (6 records) cz. 172800 IN NS a.ns.nic.cz. cz. 172800 IN NS c.ns.nic.cz. cz. 172800 IN NS b.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 20260701050000 20260618040000 54393 . Fby/HLJ88LM0Qch+WH0KZG7iUiy6rZdY1BsfWUHhSwldY+UM8nalzxrbg0jB6BxFHS3CWsNyBqbf WQ1v6sS7U2hvdDrQCwKGdplivCx/kI7XRP1tW/LYmt6PUwu3eWsKyfL9jfeD9ZRoas1nafuGKU4/ UJiqHmhxwM+MtOXb5qhyfCb/Vr1gY3x0YJEKalH1U9yO68H1jmWAw0265rxpuUwzwTbg4PhrrZj1 4Lwr4+UfVL7OsnihDsNsRfvXc0rt87UDXPVM+G6PSFM/9cH8hyIst+UtHAAnz1jYTU96uyHsV8qe 9arMbFAJcMgi+pzguh0u6p7oFNqpPH6a+oVfpg== ) ;; 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 c.ns.nic.cz. 172800 IN A 194.0.14.1 c.ns.nic.cz. 172800 IN AAAA 2001:678:11::1 b.ns.nic.cz. 172800 IN A 194.0.13.1 b.ns.nic.cz. 172800 IN AAAA 2001:678:10::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 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 = 24499 ;; 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 20260701050000 20260618040000 54393 . Fby/HLJ88LM0Qch+WH0KZG7iUiy6rZdY1BsfWUHhSwldY+UM8nalzxrbg0jB6BxFHS3CWsNyBqbf WQ1v6sS7U2hvdDrQCwKGdplivCx/kI7XRP1tW/LYmt6PUwu3eWsKyfL9jfeD9ZRoas1nafuGKU4/ UJiqHmhxwM+MtOXb5qhyfCb/Vr1gY3x0YJEKalH1U9yO68H1jmWAw0265rxpuUwzwTbg4PhrrZj1 4Lwr4+UfVL7OsnihDsNsRfvXc0rt87UDXPVM+G6PSFM/9cH8hyIst+UtHAAnz1jYTU96uyHsV8qe 9arMbFAJcMgi+pzguh0u6p7oFNqpPH6a+oVfpg== ) ;; 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 20260701050000 20260618040000 54393 . Fby/HLJ88LM0Qch+WH0KZG7iUiy6rZdY1BsfWUHhSwldY+UM8nalzxrbg0jB6BxFHS3CWsNyBqbf WQ1v6sS7U2hvdDrQCwKGdplivCx/kI7XRP1tW/LYmt6PUwu3eWsKyfL9jfeD9ZRoas1nafuGKU4/ UJiqHmhxwM+MtOXb5qhyfCb/Vr1gY3x0YJEKalH1U9yO68H1jmWAw0265rxpuUwzwTbg4PhrrZj1 4Lwr4+UfVL7OsnihDsNsRfvXc0rt87UDXPVM+G6PSFM/9cH8hyIst+UtHAAnz1jYTU96uyHsV8qe 9arMbFAJcMgi+pzguh0u6p7oFNqpPH6a+oVfpg== )`
	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 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 = 58344 ;; 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 mZ13bAat7SBOCgMpNSzUcFs6nV2rB0+FRMhVBEiO+56DuVvF3cP0T60mhXWvyem0s4YuFZNLuX7n 1r9oUKKK7Q== ) ; keytag 25527 cz. 3600 IN RRSIG ( DNSKEY 13 1 3600 20260701062134 20260617045134 20237 cz. 6TTofcEndYc7WF3+LqV99B77EdcPVcZ9MEcv8MUaSIqUCaBkyWltD03A+ksd3F+mqgtTgV6o3IiR dF5QjrgqjA== ) ;; 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 mZ13bAat7SBOCgMpNSzUcFs6nV2rB0+FRMhVBEiO+56DuVvF3cP0T60mhXWvyem0s4YuFZNLuX7n 1r9oUKKK7Q== ) ; keytag 25527`
	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 20260701062134 20260617045134 20237 cz. 6TTofcEndYc7WF3+LqV99B77EdcPVcZ9MEcv8MUaSIqUCaBkyWltD03A+ksd3F+mqgtTgV6o3IiR dF5QjrgqjA== )`
	RRSIG=20237 and DNSKEY=20237/SEP verifies the DNSKEY RRset
	DNSKEY=25527 is now in the chain-of-trust
	Query to c.ns.nic.cz for cvut.cz/A
	Received 305 bytes from 194.0.14.1
	;; Response received from [194.0.14.1] 305 octets ;; HEADER SECTION ;; id = 36528 ;; 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 nss.cvut.cz. cvut.cz. 3600 IN NS ns.cvut.cz. cvut.cz. 3600 IN DS ( 41860 13 2 2311d5df154638befa68b593c52e6b6c72060e33ff020392fa527b1f4c3bf3b3 ) cvut.cz. 3600 IN RRSIG ( DS 13 2 3600 20260624014718 20260610001718 25527 cz. w3iV9qCFamXgZ1R9PDtTNSY5d7aBCfmwpNXdiVpdduR52AHxbtwk7hU5G1dX86LjvUPr74HA6KfP c/z9ZouGmA== ) ;; 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 }
	Query to a.ns.nic.cz for cvut.cz/DNSKEY
	Received 305 bytes from 194.0.12.1
	;; Response received from [194.0.12.1] 305 octets ;; HEADER SECTION ;; id = 57796 ;; 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 20260624014718 20260610001718 25527 cz. w3iV9qCFamXgZ1R9PDtTNSY5d7aBCfmwpNXdiVpdduR52AHxbtwk7hU5G1dX86LjvUPr74HA6KfP c/z9ZouGmA== ) ;; 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 }
	Found child zone cvut.cz

cvut.cz

	Checking DS between cz and cvut.cz
	Query to d.ns.nic.cz for cvut.cz/DS
	Received 182 bytes from 193.29.206.1
	;; Response received from [193.29.206.1] 182 octets ;; HEADER SECTION ;; id = 36027 ;; 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 20260624014718 20260610001718 25527 cz. w3iV9qCFamXgZ1R9PDtTNSY5d7aBCfmwpNXdiVpdduR52AHxbtwk7hU5G1dX86LjvUPr74HA6KfP c/z9ZouGmA== ) ;; 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 20260624014718 20260610001718 25527 cz. w3iV9qCFamXgZ1R9PDtTNSY5d7aBCfmwpNXdiVpdduR52AHxbtwk7hU5G1dX86LjvUPr74HA6KfP c/z9ZouGmA== )`
	RRSIG=25527 and DNSKEY=25527 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 ns.cvut.cz for cvut.cz/DNSKEY
	Received 219 bytes from 147.32.1.20
	;; Response received from [147.32.1.20] 219 octets ;; HEADER SECTION ;; id = 27921 ;; 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 20260715080317 20260615073755 41860 cvut.cz. /8gGCJBDyzUvM6GHVaAMAbyfxdTYLxkZJAOp3gVahju4BMgwzNnKSTxVz7x/a3lsR+SNS5FgoOzL yIZlS9Mwbg== ) ;; 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 20260715080317 20260615073755 41860 cvut.cz. /8gGCJBDyzUvM6GHVaAMAbyfxdTYLxkZJAOp3gVahju4BMgwzNnKSTxVz7x/a3lsR+SNS5FgoOzL yIZlS9Mwbg== )`
	RRSIG=41860 and DNSKEY=41860/SEP verifies the DNSKEY RRset
	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 = 23451 ;; 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 20260628002829 20260529000430 41860 cvut.cz. iaKnQRVLhYA9CDm3EAVFr+AlKANWbVQGhAtsAakgOtOwZDfdhPH8ozAOVaGayBABFB5HWhhf4413 Bwebl3OYMw== ) ;; 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 20260628011936 20260529003002 41860 cvut.cz. CAz+Onr13IVLcVvMjxRMko9EiFkT1uIWSmSQztACuC0in92rM++8T+TD5q5RP4MUxbYSlbSGEHdd lPujxrMOkQ== ) ;; 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 20260628002829 20260529000430 41860 cvut.cz. tdzzquzhKikXaTiW7qq7+RdAwbLFDv0rDiELrshmAFTvlEeH1WnQ7TkWH1fsnopbPiHYjzOKAgZG wNHIAhiM+A== ) ns.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260628010141 20260529003328 41860 cvut.cz. Bn5rPmiPnv7HbpwwnsWKqz5T8mMbDqzZ5Ck+I2hnOPJf7o2YTldJd45Oq72x8uoVKFHwQ2Ser5Sw f7J7cRW7+w== ) nss.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20260628000151 20260528235736 41860 cvut.cz. +1r+bjaXvZB1ZUXTpIB+3SyIxqVXctVwydMLHV7mbB3fXdF8G5nUqwz7UDE1LzxQ1Cio9Li8GLvO 3d7i9R9QIQ== ) nss.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260628013731 20260529005555 41860 cvut.cz. ZsKz0gx1YFyt0YYc5VHNfjHBxCrFPEN8ZMuzBytID1d3Yc/Cm0XNrHQ1Eof6pvLLSxmsXsC/Jds1 WFr0A7TdYw== ) ;; { "EDNS-VERSION": 0 }
	nss.cvut.cz is authoritative for cvut.cz
	Found RRSIG signed by cvut.cz zone
	Query to ns.cvut.cz for cvut.cz/SOA
	Received 824 bytes from 147.32.1.20
	;; Response received from [147.32.1.20] 824 octets ;; HEADER SECTION ;; id = 23932 ;; 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. 12817 ;serial 14401 ;refresh 3600 ;retry 1209600 ;expire 86400 ;minimum ) cvut.cz. 6400 IN RRSIG ( SOA 13 2 6400 20260716132850 20260616122850 41860 cvut.cz. zNoxxiJhBYfh62WFdpU5SByUbAbRhw9mf6GEhbnKv36PExQM6Il+BgPW1SCcj787Ip7hgpILsUdt ZSdfzUmTYw== ) ;; AUTHORITY SECTION (3 records) cvut.cz. 6400 IN NS ns.cvut.cz. cvut.cz. 6400 IN NS nss.cvut.cz. cvut.cz. 6400 IN RRSIG ( NS 13 2 6400 20260628011936 20260529003002 41860 cvut.cz. CAz+Onr13IVLcVvMjxRMko9EiFkT1uIWSmSQztACuC0in92rM++8T+TD5q5RP4MUxbYSlbSGEHdd lPujxrMOkQ== ) ;; 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 20260628002829 20260529000430 41860 cvut.cz. tdzzquzhKikXaTiW7qq7+RdAwbLFDv0rDiELrshmAFTvlEeH1WnQ7TkWH1fsnopbPiHYjzOKAgZG wNHIAhiM+A== ) ns.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260628010141 20260529003328 41860 cvut.cz. Bn5rPmiPnv7HbpwwnsWKqz5T8mMbDqzZ5Ck+I2hnOPJf7o2YTldJd45Oq72x8uoVKFHwQ2Ser5Sw f7J7cRW7+w== ) nss.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20260628000151 20260528235736 41860 cvut.cz. +1r+bjaXvZB1ZUXTpIB+3SyIxqVXctVwydMLHV7mbB3fXdF8G5nUqwz7UDE1LzxQ1Cio9Li8GLvO 3d7i9R9QIQ== ) nss.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260628013731 20260529005555 41860 cvut.cz. ZsKz0gx1YFyt0YYc5VHNfjHBxCrFPEN8ZMuzBytID1d3Yc/Cm0XNrHQ1Eof6pvLLSxmsXsC/Jds1 WFr0A7TdYw== ) ;; { "EDNS-VERSION": 0 }
	Query to nss.cvut.cz for cvut.cz/A
	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 20260628002829 20260529000430 41860 cvut.cz. iaKnQRVLhYA9CDm3EAVFr+AlKANWbVQGhAtsAakgOtOwZDfdhPH8ozAOVaGayBABFB5HWhhf4413 Bwebl3OYMw== )`
	RRSIG=41860 and DNSKEY=41860/SEP verifies the A RRset

cvut.cz

	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 = 62702 ;; 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 20260628002829 20260529000430 41860 cvut.cz. iaKnQRVLhYA9CDm3EAVFr+AlKANWbVQGhAtsAakgOtOwZDfdhPH8ozAOVaGayBABFB5HWhhf4413 Bwebl3OYMw== ) ;; 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 20260628011936 20260529003002 41860 cvut.cz. CAz+Onr13IVLcVvMjxRMko9EiFkT1uIWSmSQztACuC0in92rM++8T+TD5q5RP4MUxbYSlbSGEHdd lPujxrMOkQ== ) ;; 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 20260628002829 20260529000430 41860 cvut.cz. tdzzquzhKikXaTiW7qq7+RdAwbLFDv0rDiELrshmAFTvlEeH1WnQ7TkWH1fsnopbPiHYjzOKAgZG wNHIAhiM+A== ) ns.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260628010141 20260529003328 41860 cvut.cz. Bn5rPmiPnv7HbpwwnsWKqz5T8mMbDqzZ5Ck+I2hnOPJf7o2YTldJd45Oq72x8uoVKFHwQ2Ser5Sw f7J7cRW7+w== ) nss.cvut.cz. 6400 IN RRSIG ( A 13 3 6400 20260628000151 20260528235736 41860 cvut.cz. +1r+bjaXvZB1ZUXTpIB+3SyIxqVXctVwydMLHV7mbB3fXdF8G5nUqwz7UDE1LzxQ1Cio9Li8GLvO 3d7i9R9QIQ== ) nss.cvut.cz. 6400 IN RRSIG ( AAAA 13 3 6400 20260628013731 20260529005555 41860 cvut.cz. ZsKz0gx1YFyt0YYc5VHNfjHBxCrFPEN8ZMuzBytID1d3Yc/Cm0XNrHQ1Eof6pvLLSxmsXsC/Jds1 WFr0A7TdYw== ) ;; { "EDNS-VERSION": 0 }
	ns.cvut.cz is authoritative for cvut.cz
	Found RRSIG signed by cvut.cz zone
	Query to ns.cvut.cz for cvut.cz/A
	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 20260628002829 20260529000430 41860 cvut.cz. iaKnQRVLhYA9CDm3EAVFr+AlKANWbVQGhAtsAakgOtOwZDfdhPH8ozAOVaGayBABFB5HWhhf4413 Bwebl3OYMw== )`
	RRSIG=41860 and DNSKEY=41860/SEP verifies the A RRset

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