CentOS Icon CentOS Logo
CentOS Text
   
  
www.centos.org Forum Index
   CentOS 6 - General Support
   iptables blocks dns

 

  Bottom    Previous Topic    Next Topic
  •  Rate Thread
      Rate this Thread
      Excellent
      Good
      Average
      Bad
      Terrible
Poster Thread
  •  TrevorH
      TrevorH
Re: iptables blocks dns
#1
Moderator
Joined: 2009/9/24
From Brighton, UK
Posts: 6351
Quote:

agriz wrote:
iptables -A OUTPUT -o eth0 -p tcp -m tcp  --dport 53 -m state --state NEW -j ACCEPT
iptables -A OUTPUT -o eth0 -p udp -m udp --dport 53 -m state --state NEW -j ACCEPT


Is that correct rule?


Yes, that looks fine.

Quote:

iptables -A INPUT -i eth0 -p tcp -m state --state NEW -m tcp --dport 25 -j ACCEPT

Do i need this above rule in the input side?
Server is not going to receive any mails. It is just going to send mails.


If you are not running an email server accepting mails from outside then there is no reason to have this rule and every reason to delete it!
_________________
Linux/VoIP Systems Administrator
Posted on: 2011/12/8 23:52
Create PDF from Post Print
Top
Subject Poster Date
     Re: iptables blocks dns TrevorH 2011/12/8 20:31
       Re: iptables blocks dns agriz 2011/12/8 20:49
         Re: iptables blocks dns TrevorH 2011/12/8 21:01
           Re: iptables blocks dns agriz 2011/12/8 21:10
             Re: iptables blocks dns TrevorH 2011/12/8 21:20
               Re: iptables blocks dns agriz 2011/12/8 21:28
                 Re: iptables blocks dns agriz 2011/12/8 21:30
                   Re: iptables blocks dns TrevorH 2011/12/8 21:46
                     Re: iptables blocks dns agriz 2011/12/8 21:52
                       Re: iptables blocks dns TrevorH 2011/12/8 22:18
                         Re: iptables blocks dns agriz 2011/12/8 22:32
                           Re: iptables blocks dns TrevorH 2011/12/8 22:43
                             Re: iptables blocks dns agriz 2011/12/8 22:53
                               Re: iptables blocks dns TrevorH 2011/12/8 23:17
                                 Re: iptables blocks dns agriz 2011/12/8 23:30
                                   Re: iptables blocks dns TrevorH 2011/12/8 23:40
                                     Re: iptables blocks dns agriz 2011/12/8 23:46
                                       Re: iptables blocks dns TrevorH 2011/12/8 23:52
                                         Re: iptables blocks dns agriz 2011/12/8 23:54
                                           Re: iptables blocks dns agriz 2011/12/9 19:08
                                             Re: iptables blocks dns TrevorH 2011/12/9 19:46
                                               Re: iptables blocks dns agriz 2011/12/9 21:15
                                                 Re: iptables blocks dns TrevorH 2011/12/9 21:42
                                                   Re: iptables blocks dns agriz 2011/12/9 21:51
                                                     Re: iptables blocks dns agriz 2011/12/9 22:04
                                                       Re: iptables blocks dns TrevorH 2011/12/9 23:14
                                                         Re: iptables blocks dns agriz 2011/12/9 23:18
                                                           Re: iptables blocks dns agriz 2011/12/9 23:27
                                                           Re: iptables blocks dns TrevorH 2011/12/9 23:29
                                                             Re: iptables blocks dns agriz 2011/12/9 23:30
                                                               Re: iptables blocks dns TrevorH 2011/12/9 23:32
                                                                 Re: iptables blocks dns agriz 2011/12/9 23:36
                                                                   Re: iptables blocks dns agriz 2011/12/9 23:52
                                                                     Re: iptables blocks dns agriz 2011/12/10 0:07
 Top   Previous Topic   Next Topic

 

 You cannot start a new topic.
 You can view topic.
 You cannot reply to posts.
 You cannot edit your posts.
 You cannot delete your posts.
 You cannot add new polls.
 You cannot vote in polls.
 You cannot attach files to posts.
 You cannot post without approval.




"Linux" is a registered trademark of Linus Torvalds. | All other trademarks are property of their respective owners. | All other content is Copyright @ 2004-2009 by the CentOS Project or "each individual contributor (forums, comments, etc.) unless otherwise assigned".| Theme based on a theme by 7dana.com