Could not open connection to the host, on port 143

[Nagarjuna Rao Cherukuri]

[root at hydlmuk2 mail]# iptables -L
/lib/modules/2.4.9-e.3/kernel/net/ipv4/netfilter/ip_tables.o: init_module: Device or resource busy
Hint: insmod errors can be caused by incorrect module parameters, including invalid IO or IRQ parameters
/lib/modules/2.4.9-e.3/kernel/net/ipv4/netfilter/ip_tables.o: insmod /lib/modules/2.4.9-e.3/kernel/net/ipv4/netfilter/ip_tables.o failed
/lib/modules/2.4.9-e.3/kernel/net/ipv4/netfilter/ip_tables.o: insmod ip_tables failed
iptables v1.2.4: can't initialize iptables table `filter': iptables who? (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.

Looks like something is wrong. Should I install something again?

-----Original Message-----
From: redhat-list-bounces at redhat.com [mailto:redhat-list-bounces at redhat.com] On Behalf Of Cecilio Marín
Sent: Wednesday, November 30, 2005 10:40 PM
To: General Red Hat Linux discussion list
Subject: Re: Could not open connection to the host, on port 143

is firewall enabled? To see it:  iptables -L

if is it, you can disable it with:   service iptables stop

and disable start at boot:   chkconfig iptables off

Atte.
Cecilio Marin


Nagarjuna Rao Cherukuri escribió:

>Another trivial question. I am trying to check whether my email server
>allows connections to imap services. So, I tried the following
>
>
>
>C:\Documents and Settings\nagarjuna_cherukuri>telnet hydlmuk2 143
>
>Connecting To hydlmuk2...Could not open connection to the host, on port
>143: Con
>
>nect failed
>
>
>
>I have installed email server on different box 2 weeks back and it
>worked fine there. But, it is not working working with new box. I tried
>disabling firewall by running "service iptables stop" and "chkconfig
>ipchains off". Still, I am not able to telnet to this box at port 143.
>Can anybody tell me if I am missing something here?
>
>
>
>Yes, imap service is up and running.
>
>
>
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