Digi TransPort WR11 User Manual page 776

Configuring security
[proto]
The [proto] firewall script field specifies the protocol to match. Specify using the proto keyword
followed by one of the following protocol identifiers:
Identifier
udp
tcp
ftp
icmp
icmpv6
decimal number
The [proto] field is also important when stateful inspection is enabled for a rule (using the [inspect-
state] field), as it describes the protocol to inspect (see [inspect-state]).
Digi TransPort® Routers User Guide
Meaning
UDP packet
TCP packet
FTP packets regardless of port number
ICMP packet
ICMPv6 packet
Decimal number matched to protocol type in IP header
Firewall
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