Packet Filters

The Allied Telesyn Routers can apply a filter set to all traffic received on an interface. If using ISDN links, with Windows PC's on site. Using this facilty can save a great deal of wasted call time by suppressing, traffic generated by Windows probing the local network.

Recomended filter set Customer Lan

 
add ip filt=1 so=0.0.0.0 ac=exclude prot=udp dp=137
 
add ip filt=1 so=0.0.0.0 ac=exclude prot=udp dp=138
 
add ip filt=1 so=0.0.0.0 ac=exclude prot=tcp dp=137
 
add ip filt=1 so=0.0.0.0 ac=exclude prot=tcp dp=138
 
add ip filt=1 so=0.0.0.0 dest=255.255.255.255 ac=exclude
 
add ip filt=1 so=0.0.0.0 ac=include

Having created the filter list, apply the list to the private ethernet interface.

set ip int=eth0 fil=1

`Filter set for customer WAN links @ Shenly`



add ip filter=52 source=0.0.0.0 smask=0.0.0.0 dest=193.128.169.0 dmask=255.255.255.0 protocol=any action=include

add ip filter=52 source=0.0.0.0 smask=0.0.0.0 dest=193.133.123.0 dmask=255.255.255.0 protocol=any action=include

add ip filter=52 source=0.0.0.0 smask=0.0.0.0 dest=192.168.124.0 dmask=255.255.252.0 protocol=any action=include

add ip filter=52 source=0.0.0.0 smask=0.0.0.0 dest=172.28.3.0 dmask=255.255.255.0 protocol=any action=include



Having created the filter list, apply the list to the private
ethernet interface.



set ip int=ppp0 fil=52