To the last windows Bind

[legacyone via bind-users]

Eagle-Eye Cherry - Save Tonight (youtube.com) 

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Re: Problem with recursion for windows bind for Teamviewer

[legacyone via bind-users]

So here is a theory if a client asks a query and bind goes out for that 
query and the reply is delayed but you get the answer then for what ever 
reason the reply to the client from bind is delayed more! So the quicker 
the answer the quicker the answer to the client.


Why? I have no idea?
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Re: Problem with recursion for windows bind for Teamviewer

[legacyone via bind-users]

and this from dig maybe a routing iusse why it take so long for me?

C:\Program Files\ISC BIND 9\bin>dig @213.227.191.1 
router14.teamviewer.com +norecurs


; <<>> DiG 9.16.45 <<>> @213.227.191.1 router14.teamviewer.com +norecurs
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36405
;; flags: qr aa; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;router14.teamviewer.com.   IN  A

;; ANSWER SECTION:
router14.teamviewer.com. 3600   IN  CNAME 
routerpool14.rlb.teamviewer.com.

routerpool14.rlb.teamviewer.com. 120 IN A   188.172.235.146
routerpool14.rlb.teamviewer.com. 120 IN A   217.146.13.137
routerpool14.rlb.teamviewer.com. 120 IN A   34.17.240.4
routerpool14.rlb.teamviewer.com. 120 IN A   217.146.21.139
routerpool14.rlb.teamviewer.com. 120 IN A   37.252.234.165

;; Query time: 3106 msec
;; SERVER: 213.227.191.1#53(213.227.191.1)
;; WHEN: Mon Nov 20 18:49:09 GMT Standard Time 2023
;; MSG SIZE  rcvd: 177

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Re: Problem with recursion for windows bind for Teamviewer

[legacyone via bind-users]

This is the thing the setup works for many site fast just this 
Teamviewer and their DNS servers are a problem and bind does reply to 
192.168.53.19 all be it 26 seconds later! but Teamviewer trys over and 
over then it connects yet the for the WAN side took under 4 seconds to 
get the answer WAN side


https://ufile.io/6ofm19ng
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Re: Problem with recursion for windows bind for Teamviewer

[legacyone via bind-users]

This might show the problem even more on two interfaces WAN side and LAN 
you can see 192.168.53.19 ask for routerpool8 #60 then bind goes out #62 
gets a answer # 75 and no reply back to 192.168.53.19


https://ufile.io/v8oob3jg
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Re: Problem with recursion for windows bind for Teamviewer

[legacyone via bind-users]

On starting Teamviewer it can say no connection when bind does the 
lookup with this delay it cause bind to not reply LAN side sometimes 
which causes the app to fail yet with a bind on Ubuntu there is no problem.
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Re: Problem with recursion for windows bind for Teamviewer

[legacyone via bind-users]

I'm just using bind to do my DNS look ups with no forwarders thats all

Teamviewer app uses DNS to find its servers from what I can tell it can 
take over 4000ms to get a answer.


The following seems to help in bind

resolver-retry-interval 5000;

I think if I can then find a setting in windows to do the same thing 
that might help even over


here is what I see from Wireshark

https://ufile.io/q0kxqltc
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Re: Problem with recursion for windows bind for Teamviewer

[legacyone via bind-users]

Now its not working fast again! I don't know now must be Teamviewer DNS 
delaying replies causing windows bind to fail in some way.
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Re: Problem with recursion for windows bind for Teamviewer

[legacyone via bind-users]

So more tests and the problem has come back but I think I know why 
thinking internet sharing was the problem I found a way to disable it 
because it bind shared access for port 53 on 0.0.0.0 so that the problem 
I think now after testing with it on.


For any interested MS has made it really hard to disable ICS on windows 
11 I have tried many ways to disable it all over the web none worked but 
what did work was to delete the start key for:


HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess
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Re: Problem with recursion for windows bind for Teamviewer

[legacyone via bind-users]

I'm by no means an expert in DNS or how it fully works so I can't be of 
any more help about this problem then I already have. But it seems 
Teamviewer have rebooted their DNS servers and now windows bind allows 
the Teamviewer to load faster


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Problem with recursion for windows bind for Teamviewer

[legacyone via bind-users]

I don't know if this will be fixed before EOL for windows bind but here 
is the problem


Teamviewer (and maybe other sites too) when you do the recursion when no 
answer under 1000ms it tries again which is trigged by client windows 
(not the one running bind) which also tries again for a answer this 
seems to causes the bind server not to give a answer but it tries and 
tries then Teamviewer works so Teamviewer DNS is doing a delayed reply 
which seems to be causing a problem for bind for windows because I 
tested bind in Ubuntu having DNS forward for teamviewer.com to it and 
Teamviewer loads faster.


So it be nice if this could be fixed but I will not hold my breath.

Thanks for any insight on this
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