(RADIATOR) Telnet, SMTP and port 25

[Robert Blayzor]

Sounds like you do not have a default gateway set, or your subnet mask
is wrong.

--
Robert Blayzor, BOFH
INOC, LLC
rblayzor at inoc.net

If the automobile had followed the same development cycle as the
computer, a Rolls-Royce would today cost $100, get a million miles per
gallon, and explode once a year, killing everyone inside. - Robert X.
Cringely


-----Original Message-----
From: owner-radiator at open.com.au [mailto:owner-radiator at open.com.au] On
Behalf Of Ayotunde Itayemi
Sent: Wednesday, August 21, 2002 2:11 PM
To: radiator at open.com.au
Cc: Hugh at Open.Com.Au
Subject: Fw: (RADIATOR) Telnet, SMTP and port 25



----- Original Message ----- 
From: Ayotunde Itayemi 
To: Hugh Irvine 
Sent: Wednesday, August 21, 2002 6:23 PM
Subject: Re: (RADIATOR) Telnet, SMTP and port 25


Hi Hugh,

Traceroute gets to the destination.
Pings are replied (reaches destination).
Also telnet to myself (mail server) on port 25 (from the same box)
works i.e,     telnet 127.0.0.1 25
This also works:            telnet mail 25

BUT this does not:    telnet any-internet-mailserver 25

Regards,
Tunde I.

----- Original Message ----- 
From: Hugh Irvine 
To: Ayotunde Itayemi 
Cc: radiator at open.com.au 
Sent: Wednesday, August 21, 2002 5:37 PM
Subject: Re: (RADIATOR) Telnet, SMTP and port 25


Hello Tunde -

The error message clearly states "No route to host".

Try a traceroute to see what is amiss.

regards

Hugh


On Wednesday, August 21, 2002, at 06:12 PM, Ayotunde Itayemi wrote:


Hi Hugh, Hi all,
 
Okay this is not a RADIUS question, but excuse me anyway.
 
I have a RedHat 6.2 Linux system that has been configured as a mail
server
for a real Internet domain. Users can receive their mails but nothing
(mails) can be sent out.
 
After a lot of troubleshooting I made out the following:
 
1. The system can't send mails out because you cannot initiate a telnet
session from it
    to any other system on port 25 e.g.,
 
[root at mail itayemi]# telnet 10.0.4.4 25
Trying 10.0.4.4...
telnet: Unable to connect to remote host: No route to host
 
This is the same message that keeps being written to the mail log
(/var/log/maillog)
by sendmail. Any ideas?
 
You can telnet to it on port 25 from other systems.
 
I have looked at all the common causes I can think of (DNS, inetd,
routing, sendmail etc)
Nothing seems to work. The system is not configured as a firewall and
the port is not blocked
by the router or any other device.
 
Regards,
Tunde I.
 
 



NB: I am travelling this week, so there may be delays in our
correspondence.

-- 
Radiator: the most portable, flexible and configurable RADIUS server
anywhere. Available on *NIX, *BSD, Windows 95/98/2000, NT, MacOS X.
-
Nets: internetwork inventory and management - graphical, extensible,
flexible with hardware, software, platform and database independence.

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