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#1 (**permalink**) 01-17-2008, 06:34 AM

On 12 Aug 2003 12:56:01 -0700, john bailo <jabailo@earthlink.net> wrote:
>
>
> 0. Telnet is up and running on a rh9 machine.
> 1. Can telnet locally
> 2. When telneting from another machine ( on the same internal network
> ) the telnet client says 'Could not open a connection to host on port
> 23'.
> 3. The telnet client can 'ping' the IP address of the redhat machine.
>
> Is there some type of port blocker that needs to be configured on the
> redhat machine?

You are SURE that telnetd is running on the machine you want to log in on?
Or that inetd is configured to bring it up?

(probably that's okay)

You may have your firewall configured to reject packets that try to
establish a connection. Ping doesn't do that.

Assuming iptables, you could try iptables --list as root

If it says this :

Chain INPUT (policy ACCEPT)
target prot opt source destination
DROP tcp -- anywhere anywhere tcp flags:SYN,RST,ACK/SYN

then you can remove that block with:

iptables -D INPUT 1

and replace it with:

iptables -A INPUT --protocol tcp --syn -j DROP

Alan

--
For Linux/Bash users: Eliminate spam with the Mailbox-Sentry-Program.
See: http://tinyurl.com/inpd for the scripts and docs.

#2 (**permalink**) 01-17-2008, 06:35 AM

Alan Connor <xxxxxx@xxxx.xxx> wrote in message news:<vnc_a.3355$Nf3.2419@newsread4.news.pas.earth link.net>...

>
> You are SURE that telnetd is running on the machine you want to log in on?
> Or that inetd is configured to bring it up?

yes, because i can 'telnet localhost'

> You may have your firewall configured to reject packets that try to
> establish a connection. Ping doesn't do that.
>
> Assuming iptables, you could try iptables --list as root

i've tried running iptables, but it said command not found.

when doing a 'find' for 'iptables' the command/file does not seem to exist.

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Re: Telnet not working remotely