IP ports not open does not mean is not hacked. a vulnerability can be used to make a change or an access
try to change and audit file access and permission firewall log analisys can give a plus to find a solution (check all IP traffic out from TCP/UDP 53) If you have RNDC , change KEY or disable it ________________________________ From: Raul Dias <r...@dias.com.br> Sent: Tuesday, February 7, 2017 3:34 PM To: Alberto Colosi; bind-users@lists.isc.org Subject: Re: bind 9 goes rogue and revert zone information Sorry, Static files. It is the master server. No dynamic updates. Host under lxc with only bind ports open. On Tue, Feb 7, 2017, 12:27 Alberto Colosi <al...@hotmail.com<mailto:al...@hotmail.com>> wrote: hi is unclear named structure if is a slave a master if dynamic updates are enabled and if the unix box has been hacked as last , zones are static files on fs ? ________________________________ From: bind-users <bind-users-boun...@lists.isc.org<mailto:bind-users-boun...@lists.isc.org>> on behalf of Raul Dias <r...@dias.com.br<mailto:r...@dias.com.br>> Sent: Tuesday, February 7, 2017 3:03 PM To: bind-users@lists.isc.org<mailto:bind-users@lists.isc.org> Subject: bind 9 goes rogue and revert zone information Hello, I have a very strange behavior that I am failing to understand. 2 to 5 times a week, a named server revert back to a previous version os a master zone. This happens during the night, usually around 20h EST. This zone has a serial of 3017020401 (yes, I typo the 3 somewhere in the past). When it reverts its zone information, it goes back to 3016060101. I have updated, restarted the host, clean all cache and journal files, grep all files in the host for 3016060101 (just shows up in the logs). So, I have no clue why, or how it is happening. Where does it get the old information. I thought first about the serial, but it would have happened in the past too, right? As it should be a 32bit unsigned integer, it shouldn't be a problem, IMHO. Yet, when "dig domain -t SOA @server", it is there again. The host is a debian Jessie and bind is 9.9.5, 1:9.9.5.dfsg-9+deb8u8 more specifically. Thanks for any direction. -rsd _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users Info Page - Internet Systems Consortium<https://lists.isc.org/mailman/listinfo/bind-users> lists.isc.org<http://lists.isc.org> To see the collection of prior postings to the list, visit the bind-users Archives. Using bind-users: To post a message to all the list members, send ... bind-users mailing list bind-users@lists.isc.org<mailto:bind-users@lists.isc.org> https://lists.isc.org/mailman/listinfo/bind-users bind-users Info Page - Internet Systems Consortium<https://lists.isc.org/mailman/listinfo/bind-users> lists.isc.org<http://lists.isc.org> To see the collection of prior postings to the list, visit the bind-users Archives. Using bind-users: To post a message to all the list members, send ...
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