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Linksys wifi router - config for minimum open ports



 
 
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Old December 15th 03, 02:02 PM posted to comp.dcom.sys.cisco,uk.telecom.broadband
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Default Linksys wifi router - config for minimum open ports

The Linksys won't have IOS but if you get one of the Wi-fi routers, it will
most likely have some type of firewall software. You should go to the
Linksys site to see if the manual is available for the model you are
interested in.

Don Woodward

"Peter" wrote in message
...

I am about to get one of these (ethernet - ethernet/wifi product).

While it may seem bizzare to post this question before having it... it
will have to be configured for a fairly strict access list. The
following access list comes from a Cisco 803 router which works fine
in that application (www, email, ftp, sntp ONLY).

Is there an equivalent config for the Linksys?

When I bought the 803, the handbook contained basically a wide-open
ACL and this causes problems with today's constant Blaster etc
attacks. This is for a friend and I can't guarantee that every PC on
the wifi network will have the latest O/S patches...

outgoing:

access-list 100 permit tcp any any eq www
access-list 100 permit udp any any eq domain
access-list 100 permit tcp any any eq domain
access-list 100 permit tcp any any eq nntp
access-list 100 permit tcp any any eq pop3
access-list 100 permit tcp any any eq ftp
access-list 100 permit tcp any any eq ftp-data
access-list 100 permit tcp any eq ftp-data any
access-list 100 permit tcp any any established

incoming:
access-list 150 permit tcp any any established
access-list 150 permit udp host 195.8.69.7 eq ntp any
access-list 150 deny tcp any any eq ftp-data
access-list 150 permit tcp any eq ftp-data any
access-list 150 deny icmp any any echo
access-list 150 permit icmp any any
access-list 150 permit tcp any any eq ident
access-list 150 permit tcp any any eq smtp
access-list 150 permit udp any eq domain any
access-list 150 deny ip any any

Peter.
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