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Re: DNS Problem [message #4291 is a reply to message #4284]

Wed, 05 July 2006 04:58

dev
Messages: 1693
Registered: September 2005
Location: Moscow

Senior Member

1. kernel

2. can you please check that you have conntracks enabled in the host (should list conntracks, not empty):
# cat /proc/net/ip_conntracks

3. can you please answer the questions those in thread:
http://forum.openvz.org/index.php?t=tree&th=717&mid= 3770&&rev=&reveal=

4. have you changed something in your default RH rules?
the rule "ACCEPT all -- 0.0.0.0/0 0.0.0.0/0" looks strange for me... google shows that it should be a rule for lo interface...

5. I don't see any rules for port 53. why have you decided that DNS should not be filtered out?

6. check iptables -L -v output, as it gets you number of matched packets and you can find number of dropped packets. this can help you to resolve where your packets are dropped.

7. please note one BIG difference. these rules are created by redhat for a single host. where INPUT and OUTPUT chains are for the host node itself. Your VEs are however using FORWARD chain when go outside and inside, i.e. RH-Firewall-1-INPUT rules are implied on VE on both directions, while on host on INPUT only. Do you see why it is so different now?

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[Message index]

		SOLVED DNS Problem By: goeldi on Tue, 04 July 2006 21:21
		Re: DNS Problem By: dev on Wed, 05 July 2006 04:58
		Re: DNS Problem By: goeldi on Wed, 05 July 2006 06:56
		Re: DNS Problem By: dim on Wed, 05 July 2006 07:40
		Re: DNS Problem By: goeldi on Wed, 05 July 2006 10:55
		Re: DNS Problem By: dim on Wed, 05 July 2006 11:13
		Re: DNS Problem By: goeldi on Wed, 05 July 2006 12:59
		Re: DNS Problem By: dev on Wed, 05 July 2006 17:22
		Re: DNS Problem By: goeldi on Wed, 05 July 2006 18:49
		Re: DNS Problem By: dev on Thu, 06 July 2006 04:46
		Re: DNS Problem By: goeldi on Thu, 06 July 2006 06:18
		Re: DNS Problem By: dev on Thu, 06 July 2006 10:15
		Re: DNS Problem By: goeldi on Thu, 06 July 2006 17:53
		Re: DNS Problem By: dev on Wed, 05 July 2006 10:40
		Re: DNS Problem By: goeldi on Wed, 05 July 2006 10:51
		Re: SOLVED DNS Problem By: AandM_Hosting on Wed, 20 September 2006 19:35

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