[Leglug-core] Why can't I connect to a local service ?

[Israel David]

---------- Forwarded message ----------
From: Oded Arbel <oded-linux at typo.co.il>
Date: Mon, Apr 14, 2008 at 9:30 PM
Subject: Why can't I connect to a local service ?
To: linux-il <linux-il at cs.huji.ac.il>


 I have a really weird problem - maybe it was always like that or it only
happened since I upgraded, I'm not sure -

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 ?

Thanks in advance

-- 
Oded
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