User`s guide

Defining Filters and Firewalls
Overview of Filter profiles
6-10 Preliminary January 30, 1998 Pipeline User’s Guide
value. If Compare is set to NotEquals, the filter is applied if the packet data
are not identical.
7
Set the More parameter.
The More parameter specifies whether the current filter is linked to the one
immediately following it. If More=Yes, the filter can examine multiple non-
contiguous bytes within a packet, by “marrying” the current filter to the next
one, so that the next filter is applied before the Forward decision is made.
The match occurs only if both non-contiguous bytes contain the specified
values. If More=No, the Forward decision is based on whether the packet
matches the definition in this one filter.
Defining IP filter conditions
If the Type parameter is set to IP, you can define filter conditions related only to
TCP/IP/UDP data packets, including bridged packets using these menus:
1
Open Ethernet
>
Filters
>
any profile
2
Determine if you need an Input or Output filter.
3
Open a filter, from 01 to 12, and select IP
For example:
Forward=Yes
Src Mask=255.255.255.192
Src Adrs=192.100.40.128
Dst Mask=0.0.0.0
Dst Adrs=0.0.0.0
Protocol=0
Src Port Cmp=None
Src Port #=N/A
Dst Port Cmp=None
Dst Port #=N/A
TCP Estab=N/A
An IP filter examines source addresses, destination addresses, IP protocol
type and port, or a combination of these.
4
Set the Forward parameter.
The Forward parameter determines whether the Pipeline will forward a
packet if it matches the definition, where Forward=Yes, or drop the packet if
it matches, where Forward=No.