DNS Resolver Host Override not working in Windows

johnpoz · Apr 30, 2019, 7:38 PM

well if unbound is not showing you that it got asked, then it didn't get asked.

How exactly is this box your doing the queries from connected to pfsense that is on 192.168.100.2?

Look in your windows arp table on windows - the mac is pfsense mac?

example

$ arp -a

Interface: 192.168.9.100 --- 0x10
  Internet Address      Physical Address      Type
  192.168.9.3           00-08-a2-0c-e6-24     dynamic
  192.168.9.10          00-11-32-7b-29-7d     dynamic
  192.168.9.11          00-11-32-7b-29-7e     dynamic
  192.168.9.65          02-11-32-29-00-3b     dynamic
  192.168.9.99          70-6e-6d-f3-11-93     dynamic
  192.168.9.101         00-13-3b-2f-67-63     dynamic
  192.168.9.201         00-13-3b-2f-67-63     dynamic
  192.168.9.206         00-21-70-7b-a9-a7     dynamic
  192.168.9.253         00-08-a2-0c-e6-24     dynamic

My pfsense is that .253 -- and that is its mac..

look on your status interfaces page

LAN Interface (lan, igb0)
Status     up
MAC Address     00:08:a2:0c:e6:24 - ADI Engineering
IPv4 Address     192.168.9.253
Subnet mask IPv4     255.255.255.0

If that shows valid - you sure yoru box is not running something that is hijacking your dns queries..

Run a sniff on your box when you dns query.. Wireshark is free and easy to use - install it on your windows machine... Do some nslookups like you were doing and then post up the pcap so we can take a look..

shawn8888 · Apr 30, 2019, 8:00 PM

Here is the arp. I have installed vmware workstation, so there are some v-NICs

c:\>arp -a

Interface: 192.168.193.1 --- 0x4
  Internet Address      Physical Address      Type
  192.168.193.254       00-50-56-f8-2e-d8     dynamic
  192.168.193.255       ff-ff-ff-ff-ff-ff     static
  224.0.0.2             01-00-5e-00-00-02     static
  224.0.0.22            01-00-5e-00-00-16     static
  224.0.0.251           01-00-5e-00-00-fb     static
  224.0.0.252           01-00-5e-00-00-fc     static
  230.0.0.1             01-00-5e-00-00-01     static
  234.48.35.103         01-00-5e-30-23-67     static
  239.192.152.143       01-00-5e-40-98-8f     static
  239.255.255.250       01-00-5e-7f-ff-fa     static
  255.255.255.255       ff-ff-ff-ff-ff-ff     static

Interface: 192.168.100.100 --- 0x7
  Internet Address      Physical Address      Type
  192.168.100.1         c0-c1-c0-7d-dd-22     dynamic
  192.168.100.2         00-50-56-9a-31-cd     dynamic
  192.168.100.3         94-0c-6d-1b-08-8e     dynamic
  192.168.100.52        a4-e4-b8-6c-55-b4     dynamic
  192.168.100.103       74-d4-35-07-1f-b5     dynamic
  192.168.100.140       00-0c-29-a9-96-19     dynamic
  192.168.100.150       18-03-73-cf-7e-1e     dynamic
  192.168.100.151       00-0c-29-13-e6-79     dynamic
  192.168.100.155       00-11-32-2c-a6-03     dynamic
  192.168.100.190       00-0c-29-82-d9-11     dynamic
  192.168.100.255       ff-ff-ff-ff-ff-ff     static
  224.0.0.2             01-00-5e-00-00-02     static
  224.0.0.22            01-00-5e-00-00-16     static
  224.0.0.251           01-00-5e-00-00-fb     static
  224.0.0.252           01-00-5e-00-00-fc     static
  230.0.0.1             01-00-5e-00-00-01     static
  234.48.35.103         01-00-5e-30-23-67     static
  239.192.152.143       01-00-5e-40-98-8f     static
  239.255.255.250       01-00-5e-7f-ff-fa     static
  255.255.255.255       ff-ff-ff-ff-ff-ff     static

Interface: 169.254.54.84 --- 0x12
  Internet Address      Physical Address      Type
  169.254.255.255       ff-ff-ff-ff-ff-ff     static
  224.0.0.2             01-00-5e-00-00-02     static
  224.0.0.22            01-00-5e-00-00-16     static
  224.0.0.251           01-00-5e-00-00-fb     static
  224.0.0.252           01-00-5e-00-00-fc     static
  230.0.0.1             01-00-5e-00-00-01     static
  234.48.35.103         01-00-5e-30-23-67     static
  239.192.152.143       01-00-5e-40-98-8f     static
  239.255.255.250       01-00-5e-7f-ff-fa     static
  255.255.255.255       ff-ff-ff-ff-ff-ff     static

c:\>

My pfsense runs on a ESXi host as a VM. And the MAC is 00-50-56-9a-31-cd, which seems correct.

I have never tried Wireshark before and I will post the log as soon as I can.

shawn8888 · May 1, 2019, 12:37 AM

Here is some log from Wireshark when I did a

c:\>nslookup www.facebook.com
Server:  UnKnown
Address:  192.168.100.2

Non-authoritative answer:
Name:    star-mini.c10r.facebook.com
Addresses:  2a03:2880:f105:83:face:b00c:0:25de
          157.240.12.35
Aliases:  www.facebook.com

mydns.zip

From the log, I can read that my Windows (100.100) DID talk to pfsense (100.2), but not handled by unbound.

One more thing to mention, I did install BIND for some testing before, but it is disabled, same with DNS forwarder. Only DNS Resolver is enabled right now.

KOM · May 1, 2019, 1:44 AM

OK, you're definitely talking to pfsense for DNS. You queried it for www.facebook.com and it returned a result for both IPv4 and IPv6. Did you add the host override for www.facebook.com?

shawn8888 · May 1, 2019, 1:45 AM

@KOM
Yes!

And for testing and fun, I disabled DNS resolver and run nslookup in Windows, and still able to resolve. Does that make any sense?

c:\>ipconfig /flushdns

Windows IP Configuration

Successfully flushed the DNS Resolver Cache.

c:\>nslookup www.facebook.com
Server:  UnKnown
Address:  192.168.100.2

Non-authoritative answer:
Name:    star-mini.c10r.facebook.com
Addresses:  2a03:2880:f10e:83:face:b00c:0:25de
          157.240.14.35
Aliases:  www.facebook.com

johnpoz · May 1, 2019, 2:23 AM

So you have something else listening on 53 on pfsense then and not unbound..

lets see what is listening on 53

[2.4.4-RELEASE][admin@sg4860.local.lan]/: sockstat | grep :53
unbound  unbound    42007 3  udp4   192.168.3.253:53      *:*
unbound  unbound    42007 4  tcp4   192.168.3.253:53      *:*
unbound  unbound    42007 5  udp6   2001:470:snipped:3::253:53 *:*
unbound  unbound    42007 6  tcp6   2001:470:snipped:3::253:53 *:*
unbound  unbound    42007 7  udp4   192.168.9.253:53      *:*
unbound  unbound    42007 8  tcp4   192.168.9.253:53      *:*
unbound  unbound    42007 9  udp4   192.168.2.253:53      *:*
unbound  unbound    42007 10 tcp4   192.168.2.253:53      *:*
unbound  unbound    42007 11 udp4   192.168.6.253:53      *:*
unbound  unbound    42007 14 tcp4   192.168.6.253:53      *:*
unbound  unbound    42007 15 udp4   192.168.4.253:53      *:*
unbound  unbound    42007 16 tcp4   192.168.4.253:53      *:*
unbound  unbound    42007 17 udp4   192.168.7.253:53      *:*
unbound  unbound    42007 18 tcp4   192.168.7.253:53      *:*
unbound  unbound    42007 19 udp4   127.0.0.1:53          *:*
unbound  unbound    42007 20 tcp4   127.0.0.1:53          *:*
unbound  unbound    42007 21 udp6   ::1:53                *:*
unbound  unbound    42007 22 tcp6   ::1:53                *:*
[2.4.4-RELEASE][admin@sg4860.local.lan]/:

shawn8888 · May 1, 2019, 2:31 AM

@johnpoz said in DNS Resolver Host Override not working in Windows:

sockstat | grep :53

You are right. seems BIND is running.

But I checked the settings and it's disabled.

And what is this "named"???

johnpoz · May 1, 2019, 2:33 AM

named is BIND

shawn8888 · May 1, 2019, 2:46 AM

Thank you so much, johnpoz!

I manually stopped the service at Status/Services screen. And this is what I got:

c:\>nslookup www.facebook.com
Server:  pfSense.mydomain.com
Address:  192.168.100.2

Name:    www.facebook.com
Address:  192.168.100.201


c:\>nslookup 192.168.100.201
Server:  pfSense.mydomain.com
Address:  192.168.100.2

Name:    www.facebook.com
Address:  192.168.100.201

Still have questions though:

As the screenshot shows, BIND is NOT enabled. How did this service get started?
I haven't touched BIND for a long time. But I did restart pfsense for testing, which means the named service get auto started when reboot. How can I stop it?

johnpoz · May 1, 2019, 2:46 AM

No idea... Seems like you config is borked.. Export your config and look at the xml.. If not enable it shouldn't be starting - unless you manually did something like installed bind on your own vs packages, etc.

shawn8888 · May 1, 2019, 2:50 AM

@johnpoz said in DNS Resolver Host Override not working in Windows:

No idea... Seems like you config is borked.. Export your config and look at the xml.. If not enable it shouldn't be starting - unless you manually did something like installed bind on your own vs packages, etc.

I installed BIND from package. I guess I will have to uninstall it later.
Thank you again for your help! You are amazing!

johnpoz · May 1, 2019, 2:51 AM

Did you maybe click on the service and start it that way? I have the package installed because time need to play with it to help users.

It doesn't auto start itself..

Learned one thing for sure - check earlier what is actually run if other users have sim issue ;) Would of solved your problem like in step one vs just trusting that all you had running was unbound.

shawn8888 · May 1, 2019, 2:53 AM

@johnpoz
No I didn't start the service manually.
Very weird, isn't it? I would think only one service can be started on one port, 53. Maybe it's a bug of pfsense? LOL

One last question:
DNS forwarder, DNS resolver and BIND all do the same thing and only one should be enabled, correct?

Is DNS resolver the best in your opinion?

johnpoz · May 1, 2019, 3:00 AM

No its not a bug.. look at your bindings.. Your not bound to the same things.

Bind is the king of dns... But you do not need it on pfsense, unbound is fine... I have been managing dns for years and years.. Since back in the bind 4 days. I just use unbound... its all you need for a home setup.

its got pretty much any of the features you could possible need.. Now if wanted to run an authoritative ns, or needed slave ns then I would run bind.

KOM · May 1, 2019, 2:32 PM

@shawn8888 said in DNS Resolver Host Override not working in Windows:

I installed BIND from package.

This would have been a good nugget to know right from the start. At least it's working now.