Whitelist dns, to avoid the log being filled with dns rebind

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Duxa
DD-WRT User


Joined: 16 Aug 2013
Posts: 191

PostPosted: Fri Sep 13, 2019 23:56    Post subject: Whitelist dns, to avoid the log being filled with dns rebind Reply with quote
Hi all,

I have a Plex server that keeps filling up the log with the following:

Aug 26 06:10:04 daemon.warn dnsmasq[5693]: possible DNS-rebind attack detected: < local ip>

Can I somehow whitelist the local ip, or domain or something to prevent it freaking out every 15 minutes or so?

EDIT:
for those looking for a solution add the following line to the dnsmasq custom config window:
rebind-domain-ok=/plex.direct/
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kernel-panic69
DD-WRT Guru


Joined: 08 May 2018
Posts: 14102
Location: Texas, USA

PostPosted: Sat Sep 14, 2019 1:26    Post subject: Reply with quote
Why, whatever do you mean? Yeah, looks like the issue isn't new:

https://forums.plex.tv/t/plex-not-working/130181

https://support.plex.tv/articles/206225077-how-to-use-secure-server-connections/

https://forums.plex.tv/t/plex-on-local-network-showing-as-remote-instead-of-nearby-dd-wrt-issue-i-think/190073

https://forums.plex.tv/t/local-network-plex-no-direct-connections/363491?page=2

https://forums.plex.tv/t/dns-rebind-protection-problem/152600

https://forums.plex.tv/t/plex-using-external-instead-of-internal-ip-address/132641

https://forums.plex.tv/t/external-ip-getting-used-internally/160260
Duxa
DD-WRT User


Joined: 16 Aug 2013
Posts: 191

PostPosted: Sat Sep 14, 2019 2:03    Post subject: Reply with quote
kernel-panic69 wrote:
Why, whatever do you mean? Yeah, looks like the issue isn't new:

https://forums.plex.tv/t/plex-not-working/130181

https://support.plex.tv/articles/206225077-how-to-use-secure-server-connections/

https://forums.plex.tv/t/plex-on-local-network-showing-as-remote-instead-of-nearby-dd-wrt-issue-i-think/190073

https://forums.plex.tv/t/local-network-plex-no-direct-connections/363491?page=2

https://forums.plex.tv/t/dns-rebind-protection-problem/152600

https://forums.plex.tv/t/plex-using-external-instead-of-internal-ip-address/132641

https://forums.plex.tv/t/external-ip-getting-used-internally/160260


Yeah, I failed at google by googling wrong terms to come up with those hits. Afterwards I found the solution and edited my original post for posterity sake (for others to stumble into).
kernel-panic69
DD-WRT Guru


Joined: 08 May 2018
Posts: 14102
Location: Texas, USA

PostPosted: Sat Sep 14, 2019 2:43    Post subject: Reply with quote
And it is appreciated. I was mainly trying to back you up on the fact that this is an issue.
jrgarrigues
DD-WRT Novice


Joined: 12 Nov 2017
Posts: 1

PostPosted: Thu Jul 22, 2021 14:08    Post subject: Re: Whitelist dns, to avoid the log being filled with dns re Reply with quote
Duxa wrote:

for those looking for a solution add the following line to the dnsmasq custom config window:
rebind-domain-ok=/plex.direct/


Excellent! Very Happy Thanks Duxa - my logs are so much cleaner now; maybe I'll actually look at them once in a while.
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