DNS Resolver does not resolve certain hostnames before I restart it

sotirone

I am having troubles with Unbound. I recently switched it to use my VPN gateway instead of my WAN and now some hostnames will not resolve until I restart the service.

Logs show nothing. Trying a DNS Lookup through the GUI just returns: Host "x.x" could not be resolved. I sometimes get it trying to access this forum.

How can I diagnose what is going on?

Edit: Anything DNSSEC related is off.

Edit2: Something is definitely wrong. I just randomly tried to browse to elle.com and it would not resolve. I logged into the WebGUI, tried to resolve elle.com through Diagnostics/DNS Lookup, says: Host "elle.com" could not be resolved.

I ran
unbound-control -c /var/unbound/unbound.conf lookup elle.com

through ssh and it successfully resolved it. I tried again to browse or DNS Lookup it and it still cannot resolve it.

Edit3: Nevermind, it is pfblockerng blocking access to aws dns. Seems the ssh command did not fully resolve after all.

Edit4: Nevermind nevermind, I am still having problems even with pfblockerng off.

sotirone

Trying to resolve and failing before unbound restart:

unbound-control -c /var/unbound/unbound.conf lookup insomnia.gr
The following name servers are used for lookup of insomnia.gr.
;rrset 9954 2 0 2 0
insomnia.gr.    9954    IN      NS      isaac.ns.cloudflare.com.
insomnia.gr.    9954    IN      NS      rachel.ns.cloudflare.com.
;rrset 85555 1 1 8 0
rachel.ns.cloudflare.com.       85555   IN      A       173.245.58.215
rachel.ns.cloudflare.com.       85555   IN      RRSIG   A 13 4 86400 20190518123220 20190516103220 34505 cloudflare.com. SY54JbO5XHPd8j5t6MVYxxALNahn7mcOSWh98AURrrw/u+LB+hd2fXvTsEwVZ385Vj1JIEPeWVIAriFTCbOulQ== ;{id = 34505}
;rrset 85557 1 1 8 0
isaac.ns.cloudflare.com.        85557   IN      A       173.245.59.177
isaac.ns.cloudflare.com.        85557   IN      RRSIG   A 13 4 86400 20190518123222 20190516103222 34505 cloudflare.com. Ej2+URrF6vz1QEFmy0W5AmDaiS/mXIsHP4lJCqIyTS3ICdgDTHuCFnc1sUN9PiuD5pMiAL6FT2wFppDq9BhzRQ== ;{id = 34505}
;rrset 73969 1 0 1 0
isaac.ns.cloudflare.com.        160369  IN      AAAA    2400:cb00:2049:1::adf5:3bb1
Delegation with 2 names, of which 1 can be examined to query further addresses.
It provides 3 IP addresses.
2400:cb00:2049:1::adf5:3bb1     not in infra cache.
173.245.59.177          LAME rto 307 msec, ttl 54, ping 11 var 74 rtt 307, tA 0, tAAAA 0, tother 0, EDNS 0 probed.
173.245.58.215          LAME rto 289 msec, ttl 55, ping 9 var 70 rtt 289, tA 0, tAAAA 0, tother 0, EDNS 0 probed.

After restart and successful resolution:

unbound-control -c /var/unbound/unbound.conf lookup insomnia.gr
The following name servers are used for lookup of insomnia.gr.
;rrset 86391 13 1 8 0
.       518391  IN      NS      j.root-servers.net.
.       518391  IN      NS      g.root-servers.net.
.       518391  IN      NS      k.root-servers.net.
.       518391  IN      NS      i.root-servers.net.
.       518391  IN      NS      a.root-servers.net.
.       518391  IN      NS      l.root-servers.net.
.       518391  IN      NS      d.root-servers.net.
.       518391  IN      NS      f.root-servers.net.
.       518391  IN      NS      e.root-servers.net.
.       518391  IN      NS      b.root-servers.net.
.       518391  IN      NS      h.root-servers.net.
.       518391  IN      NS      m.root-servers.net.
.       518391  IN      NS      c.root-servers.net.
.       518391  IN      RRSIG   NS 8 0 518400 20190530050000 20190517040000 25266 . nch66ncDvtNTkHCeyhi2HChHMmG2xUSWkuPAutqWqDBCOiL+ZNRnCoGAcfM8Q18HJpZzWrTy7iffxAYbexiX4Vh7OO4SRh10lUr+rgLY777C+vUp3bXQEDvYmibyipLmlUkkZmsmCjLA4QQKLTiD4d2rKmVKFRm9bzaYgpVqD4X+HH59JfhYtBFitA5CxZtZLNGDI347YmHDc/22AT6zqKOr8KdCMaCbDZcnpsISD8rZSzFmerkrlIWQwI0ikjMG/3z+iOzECkVs2GVX0seZSDmIp23/KMsIB8zL4OHPwe79jgywaJbyCE8R1rgBOroxDc8ZRiS/M6XIibx6KN3How== ;{id = 25266}
;rrset 86391 1 0 3 0
c.root-servers.net.     3599991 IN      A       192.33.4.12
;rrset 86391 1 0 3 0
c.root-servers.net.     3599991 IN      AAAA    2001:500:2::c
;rrset 86391 1 0 3 0
m.root-servers.net.     3599991 IN      A       202.12.27.33
;rrset 86391 1 0 3 0
m.root-servers.net.     3599991 IN      AAAA    2001:dc3::35
;rrset 86391 1 0 3 0
h.root-servers.net.     3599991 IN      A       198.97.190.53
;rrset 86391 1 0 3 0
h.root-servers.net.     3599991 IN      AAAA    2001:500:1::53
;rrset 86391 1 0 3 0
b.root-servers.net.     3599991 IN      A       199.9.14.201
;rrset 86391 1 0 3 0
b.root-servers.net.     3599991 IN      AAAA    2001:500:200::b
;rrset 86391 1 0 3 0
e.root-servers.net.     3599991 IN      A       192.203.230.10
;rrset 86391 1 0 3 0
e.root-servers.net.     3599991 IN      AAAA    2001:500:a8::e
;rrset 86391 1 0 3 0
f.root-servers.net.     3599991 IN      A       192.5.5.241
;rrset 86391 1 0 3 0
f.root-servers.net.     3599991 IN      AAAA    2001:500:2f::f
;rrset 86391 1 0 3 0
d.root-servers.net.     3599991 IN      A       199.7.91.13
;rrset 86391 1 0 3 0
d.root-servers.net.     3599991 IN      AAAA    2001:500:2d::d
;rrset 86391 1 0 3 0
l.root-servers.net.     3599991 IN      A       199.7.83.42
;rrset 86391 1 0 3 0
l.root-servers.net.     3599991 IN      AAAA    2001:500:9f::42
;rrset 86391 1 0 3 0
a.root-servers.net.     3599991 IN      A       198.41.0.4
;rrset 86391 1 0 3 0
a.root-servers.net.     3599991 IN      AAAA    2001:503:ba3e::2:30
;rrset 86391 1 0 3 0
i.root-servers.net.     3599991 IN      A       192.36.148.17
;rrset 86391 1 0 3 0
i.root-servers.net.     3599991 IN      AAAA    2001:7fe::53
;rrset 86391 1 0 3 0
k.root-servers.net.     3599991 IN      A       193.0.14.129
;rrset 86391 1 0 3 0
k.root-servers.net.     3599991 IN      AAAA    2001:7fd::1
;rrset 86391 1 0 3 0
g.root-servers.net.     3599991 IN      A       192.112.36.4
;rrset 86391 1 0 3 0
g.root-servers.net.     3599991 IN      AAAA    2001:500:12::d0d
;rrset 86391 1 0 3 0
j.root-servers.net.     3599991 IN      A       192.58.128.30
;rrset 86391 1 0 3 0
j.root-servers.net.     3599991 IN      AAAA    2001:503:c27::2:30
Delegation with 13 names, of which 0 can be examined to query further addresses.
It provides 26 IP addresses.
2001:503:c27::2:30      not in infra cache.
192.58.128.30           rto 766 msec, ttl 891, ping 94 var 168 rtt 766, tA 0, tAAAA 0, tother 0, EDNS 0 probed.
2001:500:12::d0d        not in infra cache.
192.112.36.4            rto 1112 msec, ttl 891, ping 64 var 123 rtt 556, tA 1, tAAAA 0, tother 0, EDNS 0 probed.
2001:7fd::1             not in infra cache.
193.0.14.129            NoAuthButRecursive rto 289 msec, ttl 891, ping 9 var 70 rtt 289, tA 0, tAAAA 0, tother 0, EDNS 0 probed.
2001:7fe::53            not in infra cache.
192.36.148.17           rto 438 msec, ttl 890, ping 38 var 100 rtt 438, tA 0, tAAAA 0, tother 0, EDNS 0 probed.
2001:503:ba3e::2:30     not in infra cache.
198.41.0.4              NoAuthButRecursive rto 337 msec, ttl 891, ping 25 var 78 rtt 337, tA 0, tAAAA 0, tother 0, EDNS 0 probed.
2001:500:9f::42         not in infra cache.
199.7.83.42             NoAuthButRecursive rto 419 msec, ttl 891, ping 15 var 101 rtt 419, tA 0, tAAAA 0, tother 0, EDNS 0 probed.
2001:500:2d::d          not in infra cache.
199.7.91.13             rto 408 msec, ttl 891, ping 36 var 93 rtt 408, tA 0, tAAAA 0, tother 0, EDNS 0 probed.
2001:500:2f::f          not in infra cache.
192.5.5.241             rto 764 msec, ttl 891, ping 22 var 90 rtt 382, tA 1, tAAAA 0, tother 0, EDNS 0 probed.
2001:500:a8::e          not in infra cache.
192.203.230.10          rto 346 msec, ttl 891, ping 26 var 80 rtt 346, tA 0, tAAAA 0, tother 0, EDNS 0 probed.
2001:500:200::b         not in infra cache.
199.9.14.201            rto 1242 msec, ttl 891, ping 37 var 146 rtt 621, tA 1, tAAAA 0, tother 0, EDNS 0 probed.
2001:500:1::53          not in infra cache.
198.97.190.53           rto 636 msec, ttl 891, ping 22 var 74 rtt 318, tA 1, tAAAA 0, tother 0, EDNS 0 probed.
2001:dc3::35            not in infra cache.
202.12.27.33            NoAuthButRecursive rto 379 msec, ttl 891, ping 63 var 79 rtt 379, tA 0, tAAAA 0, tother 0, EDNS 0 probed.
2001:500:2::c           not in infra cache.
192.33.4.12             rto 752 msec, ttl 891, ping 0 var 94 rtt 376, tA 1, tAAAA 0, tother 0, EDNS 0 assumed.

johnpoz

@sotirone said in DNS Resolver does not resolve certain hostnames before I restart it:

I recently switched it to use my VPN gateway instead of my WAN and now some hostnames will not resolve until I restart the service.

If you are only allowing for unbound to use your vpn interface - any problem with resolving could be with that connection or they not being able to talk to the authoritative ns for that domain, etc..

Did you flip what you posted between when it can and can not resolve.. the authoritative ns for that domain are

;; ANSWER SECTION:
insomnia.gr.            86400   IN      NS      isaac.ns.cloudflare.com.
insomnia.gr.            86400   IN      NS      rachel.ns.cloudflare.com.

Which are listed in your first paste, the 2nd paste is unbound telling you he it doesn't as yet know the ns for that domain, it would just ask the roots servers to find them..

If you can not talk to the authoritative ns for a specific domain, or find out who they are - then no you would not be able to resolve some specific fqdn in domainxyz.tld

sotirone

@johnpoz I did not flip anything.

I can ping every one of the hostnames of the dns servers so neither me nor my VPN provider is blocking or lacking access to the servers.

It is unusable so I have switched to 9.9.9.9 and forwarding for the time being. What else could be wrong and how could I diagnose?/////////////////

johnpoz

@sotirone said in DNS Resolver does not resolve certain hostnames before I restart it:

I can ping every one of the hostnames

You understand ping is not a dns query right ;) Ping what hostname? The roots - well no shit ;)

Can you directly query the ns for the domain in question?

sotirone

@johnpoz Seems like I cannot resolve the ns with unbound:

unbound-control -c /var/unbound/unbound.conf -s rachel.ns.cloudflare.com lookup insomnia.gr
[1558340860] unbound-control[400:0] fatal error: could not parse IP: rachel.ns.cloudflare.com

But running nslookup on pfsense itself:

nslookup insomnia.gr rachel.ns.cloudflare.com
Server:         rachel.ns.cloudflare.com
Address:        173.245.58.215#53

Non-authoritative answer:
Name:   insomnia.gr
Address: 104.24.6.31
Name:   insomnia.gr
Address: 104.24.7.31

Derelict

-s server[@port]
   IPv4 or IPv6 address of the server to contact. If not given, the address is read from the config file.

That is not the name server to query but the unbound server that unbound-control should try to contact. And it does not resolve. It is asking for an IP address there.

Try: unbound-control -c /var/unbound/unbound.conf -s 127.0.0.1 lookup insomnia.gr

johnpoz

@Derelict said in DNS Resolver does not resolve certain hostnames before I restart it:

unbound-control -c /var/unbound/unbound.conf -s 127.0.0.1 lookup insomnia.gr

that just asks unound who it would ask..

Until actually looked up that will just show the roots.. After actually looked up will show the actual NS for the domain

[2.4.4-RELEASE][admin@sg4860.local.lan]/root: unbound-control -c /var/unbound/unbound.conf -s 127.0.0.1 lookup insomnia.gr
The following name servers are used for lookup of insomnia.gr.
;rrset 10789 2 0 2 0
insomnia.gr.    10789   IN      NS      isaac.ns.cloudflare.com.
insomnia.gr.    10789   IN      NS      rachel.ns.cloudflare.com.
;rrset 86389 1 1 8 0
rachel.ns.cloudflare.com.       86389   IN      A       173.245.58.215
rachel.ns.cloudflare.com.       86389   IN      RRSIG   A 13 4 86400 20190521105148 20190519085148 34505 cloudflare.com. 1eP8k4Fi8txuYv4yv1hnpcI+HWI+KXlOCmZKhtnjM+DV0+x9gI9WO31m2KpREZhPyL+GTz7oIpBMge7UT1DYNg== ;{id = 34505}
;rrset 86389 1 1 8 0
rachel.ns.cloudflare.com.       86389   IN      AAAA    2400:cb00:2049:1::adf5:3ad7
rachel.ns.cloudflare.com.       86389   IN      RRSIG   AAAA 13 4 86400 20190521105148 20190519085148 34505 cloudflare.com. iE2UtNPN777BGLybK9HHgmjB98FnMlE6PNeX0DlEUFZTLDQjOXcj1XzIAZ6gMABBIq95HvzWRji5SiVI8fwM2Q== ;{id = 34505}
;rrset 86389 1 1 8 0
isaac.ns.cloudflare.com.        86389   IN      A       173.245.59.177
isaac.ns.cloudflare.com.        86389   IN      RRSIG   A 13 4 86400 20190521105148 20190519085148 34505 cloudflare.com. zyAH7dWstVBImbh4b/VNaqTT0mrK03ZkYP++WTc7XHHcelY3wOWj3+6m3/GNQLq5Qxg1W8oZnTlOBe8Bvge3Vw== ;{id = 34505}
;rrset 86389 1 1 8 0
isaac.ns.cloudflare.com.        86389   IN      AAAA    2400:cb00:2049:1::adf5:3bb1
isaac.ns.cloudflare.com.        86389   IN      RRSIG   AAAA 13 4 86400 20190521105148 20190519085148 34505 cloudflare.com. +0AsUA5grL3vG5h4ePtO6s1xgt2B2AHBk+vOeGXWVaaXBB69yaU6yxpvyW78p1c84oNc2ZjtDVjE0VudJMpPTQ== ;{id = 34505}
Delegation with 2 names, of which 0 can be examined to query further addresses.
It provides 4 IP addresses.
2400:cb00:2049:1::adf5:3bb1     not in infra cache.
173.245.59.177          not in infra cache.
2400:cb00:2049:1::adf5:3ad7     rto 376 msec, ttl 889, ping 0 var 94 rtt 376, tA 0, tAAAA 0, tother 0, EDNS 0 assumed.
173.245.58.215          rto 275 msec, ttl 889, ping 7 var 67 rtt 275, tA 0, tAAAA 0, tother 0, EDNS 0 probed.
[2.4.4-RELEASE][admin@sg4860.local.lan]/root:

Why don't you do a dig +trace right on pfsense for that - and what do you get back?

[2.4.4-RELEASE][admin@sg4860.local.lan]/root: dig insomnia.gr +trace                                                      

; <<>> DiG 9.12.2-P1 <<>> insomnia.gr +trace
;; global options: +cmd
.                       59280   IN      NS      a.root-servers.net.
.                       59280   IN      NS      b.root-servers.net.
.                       59280   IN      NS      c.root-servers.net.
.                       59280   IN      NS      d.root-servers.net.
.                       59280   IN      NS      e.root-servers.net.
.                       59280   IN      NS      f.root-servers.net.
.                       59280   IN      NS      g.root-servers.net.
.                       59280   IN      NS      h.root-servers.net.
.                       59280   IN      NS      i.root-servers.net.
.                       59280   IN      NS      j.root-servers.net.
.                       59280   IN      NS      k.root-servers.net.
.                       59280   IN      NS      l.root-servers.net.
.                       59280   IN      NS      m.root-servers.net.
.                       59280   IN      RRSIG   NS 8 0 518400 20190601170000 20190519160000 25266 . Pd94nNBB/dmXuuWIe7TLs13ewpPca2Tg8kioylE0spqDktx8NYJ+3DM8 6d5aB0ae9b3lF1jD9+paiOpiXwFvHTV/xr13ziNps2viACRAUF8dqovu 694nbsXgMjSyeAbG+qOMj5dfuC3XUFYtRo/ZATU0eTktD3m7AhQjPEpi 7nkJvx+SDsrus4jwocMOmh7xKWGZ6dbop9gtM169ZrI11GK3b17q/uvP +EQKMyYUkGvG6X705P+JjxPfmviBnMMnUDIKxa6EV4CawBfUw6DE8MNp K6qXdzSq0wqOyscyvRByFatcgZqmfVelH7Gs645J/CIETQiAF0QxGfJD xfTQzw==
;; Received 525 bytes from 127.0.0.1#53(127.0.0.1) in 1 ms

gr.                     172800  IN      NS      gr-d.ics.forth.gr.
gr.                     172800  IN      NS      grdns.ics.forth.gr.
gr.                     172800  IN      NS      gr-c.ics.forth.gr.
gr.                     172800  IN      NS      gr-at.ics.forth.gr.
gr.                     172800  IN      NS      gr-m.ics.forth.gr.
gr.                     172800  IN      NS      estia.ics.forth.gr.
gr.                     86400   IN      DS      35136 7 2 F7BF4C362B838C2069C9083FD38846BBB5D79EDBDE298F9268997307 EA7DD5C3
gr.                     86400   IN      RRSIG   DS 8 1 86400 20190602050000 20190520040000 25266 . J3bAJa/8lmeIe4cS4M0zNmMsEz1vQ9xhi1jASAWZqZ/++9vRG+K/7MQ2 KfEX92IGRGqe0IrDqhcGxjjKFwIOnCXpFNA3k02fuLV/sOPa3xicEycM 8J3lsibtk/wJn3cY6c8nTX1jNqzobofzl87gzl08D126nwJtO2aP5D/r wuEk0hoHEFQGOjiLCvEd56aF/aPUGcIWSvNV8Hw1Oq/TSbWqkk6DAxfD 6QhR+9/0leOLn7IGt+ZWidH8vyPHflOb3KYETHW3H+yI20v/S09i5mFe rTlzxX/pD8h38fGs40FnYDbg5OCqR66CNaW59kVPtBnt7qmxS/XE7tTj qOPlzg==
;; Received 738 bytes from 199.9.14.201#53(b.root-servers.net) in 79 ms

insomnia.gr.            10800   IN      NS      isaac.ns.cloudflare.com.
insomnia.gr.            10800   IN      NS      rachel.ns.cloudflare.com.
e5housd976jc4sbdh69jcejib7h0fh77.gr. 1800 IN NSEC3 1 1 10 BEEF E5N5DKOK964HISOPIF2UDK9VCTDDSQS9 NS SOA RRSIG DNSKEY NSEC3PARAM
e5housd976jc4sbdh69jcejib7h0fh77.gr. 1800 IN RRSIG NSEC3 7 2 1800 20190619060140 20190520060140 7835 gr. pyWAmbpslWBD8+c4PaMj4+rB7W/wWJbL9NJwRqbYmh/CFhx4Mfntqopn wLZlWYWVWq08tj/4o0Lo9Fj3I8/ORhKy8XhRjfucJLOtCHqLNr45FiqD YqRpobyRL9oYntY6TiF5Yi0dqEHhd3ZloE7SBJAxw71kr2TAklfHDRBH Yqs=
pqitkejamofi80bksbq392v5so3anba5.gr. 1800 IN NSEC3 1 1 10 BEEF PQQFK94F84UPU0SMUK1FNB2P8NUFNCFC DNAME RRSIG
pqitkejamofi80bksbq392v5so3anba5.gr. 1800 IN RRSIG NSEC3 7 2 1800 20190619060140 20190520060140 7835 gr. UfgOiI+YZFYVlgCMEuUAeL5j8i6WBJzUf8Gaq+Syai6EBWJ13rPNcxfC geBZTxj9dYonhjh1wMc9134S9ny7QhtNQlUvGU5rQGrQly3DjiahgDnP 38ma8OzgX5A5J4m5o1AUQqE+JFuIi39dj6NceWqi4chz/WFdLcDCS0bs VzA=
;; Received 606 bytes from 194.0.1.25#53(gr-c.ics.forth.gr) in 77 ms

insomnia.gr.            300     IN      A       104.24.6.31
insomnia.gr.            300     IN      A       104.24.7.31
;; Received 72 bytes from 173.245.59.177#53(isaac.ns.cloudflare.com) in 30 ms

[2.4.4-RELEASE][admin@sg4860.local.lan]/root:

Please notice the 300 second ttl - so like every 5 minutes unbound would have to go ask those NS again.. Which if your having network issues talking to them - yeah could pose a problem..

sotirone

@johnpoz dig +trace fails with:

BAD (HORIZONTAL) REFERRAL
dig: too many lookups

Derelict

How about you post the actual output?

johnpoz

Yeah lets see where your getting that, since I am not seeing that at all..

Post up your dig +trace like I did.

Other than odd serial number, and out of norm ttl that domain checks out fine..

The trace is pretty straight forward, roots tell you ns for .gr, those tell you ns for domain, it replies the answer don't see where you would get bad referral.. Maybe your isp is dicking with your queries? I do not see any delegation or cnames even follow.

sotirone

@Derelict I am trying to post the output but it is too long for the forum. Here is a part of it, it then just repeats.

dig insomnia.gr +trace

; <<>> DiG 9.12.2-P1 <<>> insomnia.gr +trace
;; global options: +cmd
.                       39469   IN      NS      h.root-servers.net.
.                       39469   IN      NS      f.root-servers.net.
.                       39469   IN      NS      a.root-servers.net.
.                       39469   IN      NS      d.root-servers.net.
.                       39469   IN      NS      e.root-servers.net.
.                       39469   IN      NS      k.root-servers.net.
.                       39469   IN      NS      l.root-servers.net.
.                       39469   IN      NS      i.root-servers.net.
.                       39469   IN      NS      b.root-servers.net.
.                       39469   IN      NS      g.root-servers.net.
.                       39469   IN      NS      c.root-servers.net.
.                       39469   IN      NS      j.root-servers.net.
.                       39469   IN      NS      m.root-servers.net.
.                       39469   IN      RRSIG   NS 8 0 518400 20190602170000 20190520160000 25266 . PLUnP901+Bk4vpIcVv0AHignWrbwzWwl88ln3SvytL/h7NUuIxJ6Fb3e UIsxyIFcm/fnNN57HkBhcR/VGCkwFhA3YYnhE1iekkXee8gMOPwBgtz0 iEMNqo47PaJoLFXbNNhXIr/OARj9YDbR6qfzc5Nc9RGPWaNXgku1VtUV 9tSReaeae7UsSAChYCZ4dfbWJ1UQ2QdJeJi9dPa9Z/rSS2c0O31wuwXR dNTlCFxdwZUlu7tvHWAN2GcNrlmkbPeDRrvSpOYJq+hIXNydtYde2UBi g3x4IVeN/lKKDeov3te3NhL+cSCOJCPebVRujEctBNHwHZBP89F/qJUO ASuv1g==
;; Received 525 bytes from 127.0.0.1#53(127.0.0.1) in 231 ms

gr.                     85374   IN      NS      grdns.ics.forth.gr.
gr.                     85374   IN      NS      gr-at.ics.forth.gr.
gr.                     85374   IN      NS      gr-m.ics.forth.gr.
gr.                     85374   IN      NS      gr-c.ics.forth.gr.
gr.                     85374   IN      NS      estia.ics.forth.gr.
gr.                     85374   IN      NS      gr-d.ics.forth.gr.
gr.                     13472   IN      DS      35136 7 2 F7BF4C362B838C2069C9083FD38846BBB5D79EDBDE298F9268997307 EA7DD5C3
gr.                     13472   IN      RRSIG   DS 8 1 86400 20190601170000 20190519160000 25266 . KFoU4cRGsr3YdCffHY5vjUQVTq0Hh7aH/3GgkfB7cF9QPd9r+jfJVlDP EK34JNNzZVxB1VxZDDa+B62uh0Xt3nK15WBODSO+i6UR+HzVo5yK39Xh Ltp+mRAJRfdSbXGxsWgzs28PnrzN1VZUmXvF/6B+nfaRAbhAz7ppi/M0 eE18qUKi20KRuTzFPlgpq/chb7MCG3A1NsZW04rmdvkqYZ/z7qSrlMgX zz/bF4XyJ6llXHB0G9WVa1+ruTB7nDoWdis10Pqhsjk6LIh/LRgGgmLe vkpG4QKrRvyanWiWwVHUfjFew2EjMMclxP5D8aEK7dVVRNaKHOdtcHpG VPyRTw==
;; Received 530 bytes from 192.36.148.17#53(i.root-servers.net) in 41 ms

gr.                     85365   IN      NS      gr-m.ics.forth.gr.
gr.                     85365   IN      NS      grdns.ics.forth.gr.
gr.                     85365   IN      NS      gr-c.ics.forth.gr.
gr.                     85365   IN      NS      estia.ics.forth.gr.
gr.                     85365   IN      NS      gr-at.ics.forth.gr.
gr.                     85365   IN      NS      gr-d.ics.forth.gr.
gr.                     13463   IN      DS      35136 7 2 F7BF4C362B838C2069C9083FD38846BBB5D79EDBDE298F9268997307 EA7DD5C3
gr.                     13463   IN      RRSIG   DS 8 1 86400 20190601170000 20190519160000 25266 . KFoU4cRGsr3YdCffHY5vjUQVTq0Hh7aH/3GgkfB7cF9QPd9r+jfJVlDP EK34JNNzZVxB1VxZDDa+B62uh0Xt3nK15WBODSO+i6UR+HzVo5yK39Xh Ltp+mRAJRfdSbXGxsWgzs28PnrzN1VZUmXvF/6B+nfaRAbhAz7ppi/M0 eE18qUKi20KRuTzFPlgpq/chb7MCG3A1NsZW04rmdvkqYZ/z7qSrlMgX zz/bF4XyJ6llXHB0G9WVa1+ruTB7nDoWdis10Pqhsjk6LIh/LRgGgmLe vkpG4QKrRvyanWiWwVHUfjFew2EjMMclxP5D8aEK7dVVRNaKHOdtcHpG VPyRTw==
;; BAD (HORIZONTAL) REFERRAL
;; Received 530 bytes from 139.91.191.3#53(estia.ics.forth.gr) in 41 ms

gr.                     85365   IN      NS      gr-d.ics.forth.gr.
gr.                     85365   IN      NS      estia.ics.forth.gr.
gr.                     85365   IN      NS      grdns.ics.forth.gr.
gr.                     85365   IN      NS      gr-at.ics.forth.gr.
gr.                     85365   IN      NS      gr-m.ics.forth.gr.
gr.                     85365   IN      NS      gr-c.ics.forth.gr.
gr.                     13463   IN      DS      35136 7 2 F7BF4C362B838C2069C9083FD38846BBB5D79EDBDE298F9268997307 EA7DD5C3
gr.                     13463   IN      RRSIG   DS 8 1 86400 20190601170000 20190519160000 25266 . KFoU4cRGsr3YdCffHY5vjUQVTq0Hh7aH/3GgkfB7cF9QPd9r+jfJVlDP EK34JNNzZVxB1VxZDDa+B62uh0Xt3nK15WBODSO+i6UR+HzVo5yK39Xh Ltp+mRAJRfdSbXGxsWgzs28PnrzN1VZUmXvF/6B+nfaRAbhAz7ppi/M0 eE18qUKi20KRuTzFPlgpq/chb7MCG3A1NsZW04rmdvkqYZ/z7qSrlMgX zz/bF4XyJ6llXHB0G9WVa1+ruTB7nDoWdis10Pqhsjk6LIh/LRgGgmLe vkpG4QKrRvyanWiWwVHUfjFew2EjMMclxP5D8aEK7dVVRNaKHOdtcHpG VPyRTw==
;; BAD (HORIZONTAL) REFERRAL
;; Received 530 bytes from 194.0.11.102#53(gr-d.ics.forth.gr) in 41 ms

gr.                     85365   IN      NS      gr-at.ics.forth.gr.
gr.                     85365   IN      NS      gr-d.ics.forth.gr.
gr.                     85365   IN      NS      gr-c.ics.forth.gr.
gr.                     85365   IN      NS      gr-m.ics.forth.gr.
gr.                     85365   IN      NS      grdns.ics.forth.gr.
gr.                     85365   IN      NS      estia.ics.forth.gr.
gr.                     13463   IN      DS      35136 7 2 F7BF4C362B838C2069C9083FD38846BBB5D79EDBDE298F9268997307 EA7DD5C3
gr.                     13463   IN      RRSIG   DS 8 1 86400 20190601170000 20190519160000 25266 . KFoU4cRGsr3YdCffHY5vjUQVTq0Hh7aH/3GgkfB7cF9QPd9r+jfJVlDP EK34JNNzZVxB1VxZDDa+B62uh0Xt3nK15WBODSO+i6UR+HzVo5yK39Xh Ltp+mRAJRfdSbXGxsWgzs28PnrzN1VZUmXvF/6B+nfaRAbhAz7ppi/M0 eE18qUKi20KRuTzFPlgpq/chb7MCG3A1NsZW04rmdvkqYZ/z7qSrlMgX zz/bF4XyJ6llXHB0G9WVa1+ruTB7nDoWdis10Pqhsjk6LIh/LRgGgmLe vkpG4QKrRvyanWiWwVHUfjFew2EjMMclxP5D8aEK7dVVRNaKHOdtcHpG VPyRTw==
;; BAD (HORIZONTAL) REFERRAL
;; Received 530 bytes from 78.104.145.227#53(gr-at.ics.forth.gr) in 40 ms

gr.                     85365   IN      NS      gr-at.ics.forth.gr.
gr.                     85365   IN      NS      gr-c.ics.forth.gr.
gr.                     85365   IN      NS      gr-m.ics.forth.gr.
gr.                     85365   IN      NS      estia.ics.forth.gr.
gr.                     85365   IN      NS      grdns.ics.forth.gr.
gr.                     85365   IN      NS      gr-d.ics.forth.gr.
gr.                     13463   IN      DS      35136 7 2 F7BF4C362B838C2069C9083FD38846BBB5D79EDBDE298F9268997307 EA7DD5C3
gr.                     13463   IN      RRSIG   DS 8 1 86400 20190601170000 20190519160000 25266 . KFoU4cRGsr3YdCffHY5vjUQVTq0Hh7aH/3GgkfB7cF9QPd9r+jfJVlDP EK34JNNzZVxB1VxZDDa+B62uh0Xt3nK15WBODSO+i6UR+HzVo5yK39Xh Ltp+mRAJRfdSbXGxsWgzs28PnrzN1VZUmXvF/6B+nfaRAbhAz7ppi/M0 eE18qUKi20KRuTzFPlgpq/chb7MCG3A1NsZW04rmdvkqYZ/z7qSrlMgX zz/bF4XyJ6llXHB0G9WVa1+ruTB7nDoWdis10Pqhsjk6LIh/LRgGgmLe vkpG4QKrRvyanWiWwVHUfjFew2EjMMclxP5D8aEK7dVVRNaKHOdtcHpG VPyRTw==
;; BAD (HORIZONTAL) REFERRAL
;; Received 530 bytes from 78.104.145.227#53(gr-at.ics.forth.gr) in 40 ms

johnpoz

Well yeah you got something going on there..

Your TTLs are all wrong...

Your gr ttls are 85374, if you would of actually gotten them from the roots they would 172800

Those are NOT correct.. its like something is intercepting your queries..

Simple enough to ask a root server for the NS of gr.. Pick one of the roots and ask them for them..

$ dig @e.root-servers.net gr. NS                                            
                                                                            
; <<>> DiG 9.14.1 <<>> @e.root-servers.net gr. NS                           
; (1 server found)                                                          
;; global options: +cmd                                                     
;; Got answer:                                                              
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13538                   
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 11          
;; WARNING: recursion requested but not available                           
                                                                            
;; OPT PSEUDOSECTION:                                                       
; EDNS: version: 0, flags:; udp: 4096                                       
;; QUESTION SECTION:                                                        
;gr.                            IN      NS                                  
                                                                            
;; AUTHORITY SECTION:                                                       
gr.                     172800  IN      NS      gr-c.ics.forth.gr.          
gr.                     172800  IN      NS      gr-d.ics.forth.gr.          
gr.                     172800  IN      NS      gr-m.ics.forth.gr.          
gr.                     172800  IN      NS      estia.ics.forth.gr.         
gr.                     172800  IN      NS      gr-at.ics.forth.gr.         
gr.                     172800  IN      NS      grdns.ics.forth.gr.         
                                                                            
;; ADDITIONAL SECTION:                                                      
gr-c.ics.forth.gr.      172800  IN      A       194.0.1.25                  
gr-d.ics.forth.gr.      172800  IN      A       194.0.11.102                
gr-m.ics.forth.gr.      172800  IN      A       194.0.4.10                  
estia.ics.forth.gr.     172800  IN      A       139.91.191.3                
gr-at.ics.forth.gr.     172800  IN      A       78.104.145.227              
grdns.ics.forth.gr.     172800  IN      A       139.91.1.1                  
gr-c.ics.forth.gr.      172800  IN      AAAA    2001:678:4::19              
gr-d.ics.forth.gr.      172800  IN      AAAA    2001:678:e:102::53          
gr-m.ics.forth.gr.      172800  IN      AAAA    2001:678:7::4:10            
estia.ics.forth.gr.     172800  IN      AAAA    2001:648:2c30::191:3        
                                                                            
;; Query time: 11 msec                                                      
;; SERVER: 192.203.230.10#53(192.203.230.10)                                
;; WHEN: Mon May 20 20:13:27 Central Daylight Time 2019                     
;; MSG SIZE  rcvd: 366

That you didn't get back the FULL ttl something is not right... You should always get back the FULL ttl for the NS from roots.. when you ask them or trace..

Do a sniff on your wan when you do your trace so you can see exactly what is being asked, and what comes back.. But not getting back full TTL from roots points to possible interception..

When you ask an authoritative ns for a record that its authoritative for you will always get back the FULL TTL, not something less..

OR?? your not actually asking them for the domain in question but ns for gr again?? Do you have query name minimization set???

Nope I just tested that - and then doesn't doesn't cause the problem your seeing.. And getting back full TTL in every trace still, etc.. There is something going on - that your not getting back full TTL screams not actually talking to the authoritative NS..

edit: Just noticed this as well.. Why would it take you 231ms to retrieve the roots from local???

;; Received 525 bytes from 127.0.0.1#53(127.0.0.1) in 231 ms

That should almost always be like 0 or 1 ms.. Did you not run that command that dig +trace command on pfsense itself? Or your running forwarder? on the local machine you ran it on?

diego_81

same issue after update to 2.4.4-RELEASE-p3
i can t resolve vertele.eldiario.es, but if restart pfsense it works a few moments after fall down again
no ping
ping vertele.eldiario.es
PING cec01.usg.edgetcdn.com (74.208.86.233) 56(84) bytes of data.
--- cec01.usg.edgetcdn.com ping statistics ---
6 packets transmitted, 0 received, 100% packet loss, time 159ms

Derelict

@diego_81 said in DNS Resolver does not resolve certain hostnames before I restart it:

same issue after update to 2.4.4-RELEASE-p3
i can t resolve vertele.eldiario.es, but if restart pfsense it works a few moments after fall down again
no ping
ping vertele.eldiario.es
PING cec01.usg.edgetcdn.com (74.208.86.233) 56(84) bytes of data.
--- cec01.usg.edgetcdn.com ping statistics ---
6 packets transmitted, 0 received, 100% packet loss, time 159ms

That says it is RESOLVING fine. ICMP isn't being returned. You might want to stop looking at DNS resolution and start looking at why you cannot ping 74.208.83.233 at that moment in time.

diego_81

@Derelict i love you!!!!!
snort was blocking http traffic to this websites

thnks!!!!!!

Derelict

Amazing.