[ale] Comcast: can get out but not in

Steven A. DuChene linux-clusters at mindspring.com
Mon Sep 18 16:17:33 EDT 2006


Jim:
Thanks for the questions.
There is nothing except a network cable between the system
and the cable modem. I had my non-technical friend on-site
double check the IP address showing up on the system and
it was indeed the exact one I was trying to connect to.

-----Original Message-----
>From: Jim Popovitch <jimpop at yahoo.com>
>Sent: Sep 17, 2006 4:31 PM
>To: Atlanta Linux Enthusiasts <ale at ale.org>
>Subject: Re: [ale] Comcast: can get out but not in
>
>On Sun, 2006-09-17 at 15:41 -0700, Steven A. DuChene wrote:
>> I am remotely located from my place in Atl but I still have a server or two
>> turned on there and connecting via Comcast. Over the past couple of days
>> I have not been able to get into those servers. I had a non-technical friend
>> go over and look at them while I guided her over the phone. Turns out she
>> can get out (nslookup works fine) but I am not able to get in either on port
>> 80 (apache) or port 22 (ssh). I also had her try starting an sshd process on
>> a high port but that had no effect either. I have tried this with my firewall
>> rules enabled and disabled but still no luck. This is a firewall server running
>> SuSE that is directly connected to the network port on the cable modem.
>> 
>> Does anyone else have any weirdness going on with comcast inbound connections?
>
>Is there anything between your cable modem and your linux server?
>Firewall?  Router? 
>
>Are you sure you are using the right IP address when you try your
>external ssh session?  Did your CM IP change?
>
>Comcast does not block any inbound ports for my IP.
>
>-Jim P.



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