BIND less restrictive modes and policy

Steve Grubb sgrubb at
Mon Jan 21 13:55:55 UTC 2008

On Monday 21 January 2008 06:57:38 Adam Tkac wrote:
> I'm going to do major revision of bind's file modes. Currenly We have
> many files readable only by root and I can't see any reason why keep
> binaries unreadable and unexecutable by other users.

What other users would be sharing a DNS server? named is traditionally used 
only on servers. It is a high value target for hackers. If they can get the 
DNS server, they can alter where all users go when they are surfing the web 
(think mega-phishing attack). If an intruder gets access to the DNS server, 
they are going after named. DNS servers are constantly under attack.

> Also there isn't any reason why keep configuration private. Only this files
> should not be readable by other users:
> - /etc/rndc.key - who has it may control server through rndc utility
> - /var/log/named.log - will have sensitive information

I'd keep all the configuration private. For what reason would you make a high 
value target less secure?


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