remote telnet and email

Posted by Mustafa Ismail Mustafa on Server Fault See other posts from Server Fault or by Mustafa Ismail Mustafa
Published on 2010-03-17T11:22:06Z Indexed on 2010/03/17 11:31 UTC
Read the original article Hit count: 520

Filed under:

telnet

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email

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domain

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ping

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traceroute

This issue has been occupying my work for the last few days and I will be understating when I say its driven me up the blasted walls.

Essentially, I can ping and tracert the domain jnrcs.org and the subdomains mail.jnrcs.org and mail.jordanredcrescent.org. All three mentioned point to ip address 212.38.147.97.

About 4 days ago, when we registered the domain "jnrcs.org" suddenly all external connection to the mail server from outside was lost. Not just mail, but other http based port-forwarded or natted services (such as camera surveillance and pbx services).

I tried good old telnet (I'm a linux user) and I get the following output:

telnet> o mail.jnrcs.org 25
Trying 212.38.147.97...
telnet: Unable to connect to remote host: No route to host
telnet>

Tracert gives me:

traceroute to mail.jnrcs.org (212.38.147.97), 30 hops max, 60 byte packets
1  192.168.1.2 (192.168.1.2)  0.869 ms  0.944 ms *
2  * * *
3  * * *
4  * * *
5  * * *
6  * 212.38.128.118 (212.38.128.118)  33.875 ms  39.187 ms
7  * * *
8  * * *
9  * * *

10 * * * 11 * * 212.38.147.97 (212.38.147.97) 67.621 ms

I am stumped. Other friends from all around the world can telnet no problem. What could have possibly happened to make telnet/smtp/pop/imap/http access stop?

Please bear in mind I'm primarily a developer but I [am under the delusion] that I can carry my weight in IT administration :)

TIA

© Server Fault or respective owner

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