From: Ralf Spenneberg <lists@spenneberg.org>
To: Daniel Arjona <darjona@transito.gob.pa>
Cc: Netfilter <netfilter@lists.netfilter.org>
Subject: Re: I can't resolve DNS name
Date: 30 Aug 2003 13:42:59 +0200 [thread overview]
Message-ID: <1062243778.1605.8.camel@kermit> (raw)
In-Reply-To: <0afd01c36e54$67e73620$0221a0c0@DANIEL>
Am Fre, 2003-08-29 um 19.38 schrieb Daniel Arjona:
> Observations:
> I have LRH 8.0 and iptables is in the my unique server with squid, qmail and
> others.
> My router is directly connected to the NIC of the server.
> When i try to connect to any FTP Server, i recieve this message "I can't
> resolve DNS name"
> I can't do ping to any IP Address
Looking at the iptables output below, I do not see any drop rule. Your
firewall code does not stop any packet. If you can't resolve any name,
test your name resolution and ping an ip-address, like:
ping 217.160.128.61
If that does not work, check your routing.
> echo 1 > /proc/sys/net/ipv4/ip_forward
> [root@transito root]# iptables -t nat -L
> Chain PREROUTING (policy ACCEPT)
> target prot opt source destination
>
> Chain POSTROUTING (policy ACCEPT)
> target prot opt source destination
> MASQUERADE all -- 192.160.33.0/24 anywhere
>
> Chain OUTPUT (policy ACCEPT)
> target prot opt source destination
> ******************************************
>
> [root@transito root]# iptables -L -n
>
> Chain INPUT (policy ACCEPT)
> target prot opt source destination
> ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
> ACCEPT all -- 192.160.33.0/24 0.0.0.0/0
> ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:25
> ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:110
>
> Chain FORWARD (policy ACCEPT)
> target prot opt source destination
> ACCEPT tcp -- 192.160.33.0/24 0.0.0.0/0 tcp dpt:80
> ACCEPT tcp -- 192.160.33.0/24 0.0.0.0/0 tcp dpt:143
> ACCEPT tcp -- 192.160.33.0/24 0.0.0.0/0 tcp dpt:53
> ACCEPT udp -- 192.160.33.0/24 0.0.0.0/0 udp dpt:53
> ACCEPT tcp -- 192.160.33.0/24 0.0.0.0/0 tcp dpt:21
> ACCEPT tcp -- 192.160.33.0/24 0.0.0.0/0 tcp dpt:1214
>
> Chain OUTPUT (policy ACCEPT)
> target prot opt source destination
Cheers,
Ralf
--
Ralf Spenneberg
RHCE, RHCX
Book: Intrusion Detection für Linux Server http://www.spenneberg.com
IPsec-Howto http://www.ipsec-howto.org
Honeynet Project Mirror: http://honeynet.spenneberg.org
prev parent reply other threads:[~2003-08-30 11:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-29 17:38 I can't resolve DNS name Daniel Arjona
2003-08-30 1:33 ` cc
2003-08-30 11:42 ` Ralf Spenneberg [this message]
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