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Comcast migraton causes some LAN users to lose IE and Outlook connection.

By lmm ·
This morning our business migrated from TIme Warner to Comcast. Now two of my LAN users are unable to access IE or Email (via Outlook or outlook express). However, they ARE able to access ICQ, and anything INTERNAL is accessible as well. Any ideas on what could be the problem? I can't get Comcast to call me back. Out of an entire office, these are the only two that have the problem.
Could it be the version of IE that they are using? If so, that would be strange, because the rest of us are using the same version. ANY assistance is greatly appreciated!

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by Richdoode In reply to Comcast migraton causes s ...

I'm going to assume these are remote users accessing your server for email or they are users in your network trying to access an email server outside your network.

Welcome to Comcast. Comcast in their infinite wisdom are selectively blocking ports 25 and 110 to "reduce spam bots". It isn't all their routers so you'll have to do some investigation to see which routers are actually stopping the traffic. tcptraceroute from an exposed linux computer may help with that but most likely you will need Comcast tech support. Keep trying tech support until you get someone that knows something and can unblock those ports for you on the router where it is blocked. Also, make sure you get the direct number of the person that helped you unless you like talking to tech support people that are clueless. My opinion is don't use Comcast if you can help it. Good luck.

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