3Com SuperStack II 9300 Command Reference Manual page 375

Select menu option (bridge/packetFilter): create custom
Editor Commands
Buffer: list = Ctrl-l
Line: next = Ctrl-n, previous = Ctrl-p
Cursor: start = Ctrl-a, end = Ctrl-e, left = Ctrl-b, right = Ctrl-f
Insert: line = Enter
Delete: previous = Ctrl-h (BSP), current = Ctrl-d (DEL), line = Ctrl-k
Mode: insert/overstrike toggle = Ctrl-o
Save: Ctrl-w
Exit: Esc
Create Custom Bridge Packet Filter Example (3500)
After you enter the custom filter editor, the system displays the editor
commands, as shown here.
You now enter packet filter language statements that define the packet
filter algorithm. See the Implementation Guide for your system for
information about developing the packet filters.
bridge packetFilter create custom 375