Centos comes with iptables pre-configured to block almost everything.
There is a tool to configure it - system-config-firewall
or just /etc/init.d/iptables stop :-)
On Tue, Apr 15, 2008 at 12:49 AM, Yedidyah Bar-David
<[EMAIL PROTECTED]> wrote:
> On Tue, Apr 15, 2008 at 07:30:18AM +0300, Oded Arbel wrote:
> > I have a really weird problem - maybe it was always like that or it only
> > happened since I upgraded, I'm not sure -
>
> Works for me (on CentOS 5.1).
>
>
> >
> > I have a CentOS 5.1 box and for some weird reason I can't connect using
> > TCP to a server running on the same machine, either through localhost or
> > through the eth0 IP address. Connections from outside work great and the
> > httpd is happily serving users across the network.
> >
> > When I try to connect, even something simple such as
> > telnet localhost 80
> > I get a timeout:
> > # strace -f telnet localhost 80
> > ...
> > connect(3, {sa_family=AF_INET, sin_port=htons(80),
> > sin_addr=inet_addr("127.0.0.1")}, 16) = -1 ETIMEDOUT (Connection timed
> > out)
> > write(2, "telnet: connect to address 127.0"..., 59) = 59
> > close(3) = 0
> > write(2, "telnet: Unable to connect to rem"..., 63
> >
> > /etc/hosts.deny was the immediate suspect, but its empty. IPTables was
> > on, but is set to always allow "lo" (and port 80 among others) and
> > turning it off didn't help. So what can I check next ?
>
> How about
> tcpdump -n -i lo
> ?
>
> Also strace httpd?
> --
> Didi
>
>
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