Cannot access certain website via network (Firewall issue)

JulesSF

Honorable
Nov 21, 2012
10
0
10,510
We have been noticing a strange issue since upgrading to Comcast Business with a new Motorola 6580 modem/router:
certain common websites can no longer be accessed via the network (although they load fine when accessed via smartphone 3/4G)

I already did some reading on the subject and it looks like the Firewall is to blame:
when I switch Firewall to "Off", everyone can access the websites ok,
as soon as I switch Firewall back to "Low" - no more website access.

Question: is there any workaround for this issue other than turning off the Firewall?
There are various office computers on this network, would hate to make the network vulnerable to attacks without a Firewall.
 

meuchel

Distinguished
Jan 7, 2011
45
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18,540
Comcast's forums state that a firmware upgrade should alleviate issues with firewall performance.

check you are running the latest firmware
check logs to see what reason for blocking is.