Re: [OT] port 53
On Sun, 01 Jul 2012 23:26:58 +0800, lina wrote:
> (1) What shall I do if lots of foreign address connected to my port 53
> (details see the bottom),
If you are serving DNS requests, that's normal...
> (2) ssh: Could not resolve hostname at the same time.
What?!
> (3) Seems it's initiated by iceweasle.
>
> I am not experienced, thanks ahead for any suggestions.
>
> 128.8.10.90#53
sm01@stt008:~$ host 128.63.2.53
53.2.63.128.in-addr.arpa domain name pointer h.root-servers.net.
> 208.93.136.12#53
sm01@stt008:~$ host 208.93.136.12
12.136.93.208.in-addr.arpa domain name pointer DNS12.CTNDO.NET.
> 2001:dc3::35#53
> 192.58.128.30#53
sm01@stt008:~$ host 192.58.128.30
30.128.58.192.in-addr.arpa domain name pointer j.root-servers.net.
(...)
Now you know how it works :-)
> 216.239.32.10#53
sm01@stt008:~$ host 216.239.38.10
10.38.239.216.in-addr.arpa domain name pointer ns4.google.com.
Re-think a bit what's your system configuration. You should be running a
DNS server by some reason and it should have been setup for someone... if
you are completely unaware of this situation, ask to your network/system
administrator about this.
Greetings,
--
Camaleón
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