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 :: Mailing Lists

[ILUG] firewall wierdness

[ILUG] firewall wierdness

Madscientist madscientist at macunlimited.net
Mon Jan 5 22:03:35 GMT 2004


ive been having some problems with my network of late, particulaly a wonky
wireless connection acting up. in my attemps to narrow it down a found
myself looking at the log for my firewall to find 2 anomolies

1- dozens of incoming packets on port 65535.
--i looked into this and found something about fragmented packets arrive at
this port, but aside from the fact that theyre fragmented doesnt help me
much. how exactly do they get fragmented? what were they before the got
fragmented? pinging the addresses they come from seems to get no response on
any that ive tried.

2-a blocked inbound port 110 attempt from my isp's pop3 server.
--my dad was attempting to check his email around the same time, but what
exactly was incoming? i use web based email so i havent had a chance to
check it out properly and im still not entirely sure what counts an incoming
and what is allowed as outgoing.
my main confusion with firewalls is that i can quite cheerfully dowload
stuff even if port 80 incoming is blocked.....i have yet to get my head
round it.

edward mccaughan

oh, and while i was writing this the firewall blocked an incoming packet on
port 80 from the microsoft update
service......hmmm.

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