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]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1062243778.1605.8.camel@kermit \
--to=lists@spenneberg.org \
--cc=darjona@transito.gob.pa \
--cc=netfilter@lists.netfilter.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.