HP procurve switch 2600 series Access Security Manual page 213

example, if you want to prevent server "A" from receiving traffic sent by
workstation "X", but do not want to prevent any other servers or end nodes
from receiving traffic from workstation "X", you would configure a filter to
drop traffic from port 5 to port 7. The resulting filter would drop traffic from
port 5 to port 7, but would forward all other traffic from any source port to
any destination port. (Refer to figures 9-1 and 9-2.
Workstation " X"
Figure 9-1. Example of a Filter Blocking Traffic only from Port 5 to Server "A"
Figure 9-2. The Filter for the Actions Shown in Figure 9-1
Applying a Source Port Filter in a Multinetted VLAN. If you have mul
tiple IP addresses configured on the same VLAN (multinetting), and routing
is enabled on the switch, then a single port or trunk can be both the source
and destination of packets moving between subnets in that same VLAN. In this
case, you can prevent the traffic of one subnet from being routed to another
subnet on the same port by configuring the port or trunk as both the source
and destination for traffic to drop.
Traffic/Security Filters (HP ProCurve Switch 2824 and 2848)
Port 5
Overview
Port 7 Server "A"
Port 8 Server "B"
Port 9 Server "C"
This list shows the filter created
to block (drop) traffic from
source port 5 (workstation "X") to
destination port 7 (server "A").
Notice that the filter allows
traffic to move from source port
5 to all other destination ports.
9-3