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 188.8.131.52.
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 184.108.40.206... telnet: Unable to connect to remote host: No route to host telnet>
Tracert gives me:
traceroute to mail.jnrcs.org (220.127.116.11), 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 * 18.104.22.168 (22.214.171.124) 33.875 ms 39.187 ms 7 * * * 8 * * * 9 * * *
10 * * * 11 * * 126.96.36.199 (188.8.131.52) 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 :)