Configuring Firewall/ ZAP

[ferrarimodena360]

I have an adsl pppoe connection....
and recently i had been facing problems of connection timeouts (no bytes are received) at irregular intervals....due to which i have to reconnect.......i think i have solved the problem, it was my zonealarm

i have made the following changes

allow outgoing dns
allow outgoing dhcp
allow broadcast/multicast
allow incoming ping (icmp)
allow other incoming icmp
allow outgoing ping (icmp)
allow other outgoing icmp
allow incoming igmp
allow outgoing igmp

BLOCKED netbios port 135, 137-9,445

i have done this as i read that cable/dsl providers either use icmp or netbios methods to see if connections are alive and if not drop them....

http://www.broadbandreports.com/forum/remark,8132541~root=security,1~mode=flat

since these changes, i havent faced dropouts, but i believe that this has rendered my system vulnerable and some of these settings are not needed..

please advice
thanx

[RACKnRAIL]

That's interesting. My friend has been having the same problem with his adsl connection, but I haven't been able to isolate what's causing it. I will take a closer look at ZA.

[ferrarimodena360]

i have now disabled both

incoming igmp
outgoing igmp

and connection is still going strong