Comments on: Accessing email server behind firewall http://itknowledgeexchange.techtarget.com/itanswers/accessing-email-server-behind-firewall/ Sun, 19 May 2013 03:14:28 +0000 hourly 1 By: petkoa http://itknowledgeexchange.techtarget.com/itanswers/accessing-email-server-behind-firewall/#comment-56154 petkoa Thu, 04 Sep 2008 15:17:07 +0000 #comment-56154 Hi Bridgemics,

I think first of all you have toensure you are reaching yor imap server. If you have a linuxbox ready, hping2 is what you need. If you have no linux box, get a live CD with a rescue linux distribution (I, personally, use insert – http://www.inside-security.de/insert_en.html – or grlm – http://grml.org/ ), and hping tcp port 143 with SYN packets. If you don’t get SYN ACK packets back, trace the route for this kind of packets (man hping describes all necessary options). If you have any issues with hpinging,
resolve them and then try to “telnet imapserver 143″ – telnet can serve as a basic client for any protocol – and get any error messages.

It is possible (and very probable) that imap server can be reached from outside LAN only using tls encryption. In this case you have to set appropriately your real imap client.

Good luck,

Petko

]]> By: bridgemics http://itknowledgeexchange.techtarget.com/itanswers/accessing-email-server-behind-firewall/#comment-56152 bridgemics Thu, 04 Sep 2008 15:11:52 +0000 #comment-56152 Sorry if this reply is in the wrong place I didn’t really understand the format of this system
Anyway, I don’t have a way to do this. If I connect from within my LAN I have no problems. I don’t have another PC on the internet with a standard IMAP client to try to make the connection. Since the original post Ihave removed the firewall entirely and still get the same problem, so I guess it is either the email server software or the windows 200 software.
I am still trying so any more ideas would be great.

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