BCP for ISP to block worms at PEs and NAS
Kim Onnel
karim.adel at gmail.com
Sun Apr 17 11:28:21 UTC 2005
Hello,
Can someone confirm if my approach explained below is sufficient and
if there is other/better ways to do this ? something i am missing.
On my Cisco-based SP network with RPMs in MGX chassis acting as PEs:
I have the ACL below applied on many network devices to block the
common worms ports,
On the NAS, i have placed the worm on the Group-Async interfaces so
the worms will not propagate between user who dial up on the same NAS,
and on the uplink ethernet interface.(in and out)
On the PEs, i have placed it on the interface switches for the
customers and on the uplink too, and then on the aggregating routers
and on the gateway for all these.
ip access-list extended worms
deny tcp any any eq 5554
deny tcp any any range 135 139
deny udp any any range 135 netbios-ss
deny tcp any any eq 445
deny udp any any eq 1026
permit ip any any
Regards
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