Digi TransPort WR31 User Manual page 703

Configure security settings
Other defined port keywords are as follows. The service keywords are predefined based on standard
port numbers. These port numbers may have been defined differently on your system, in which case
you should use the port numbers explicitly, and not the defined names.
Keyword
Ftpdat
Ftpcnt
telnet
smtp
http
pop3
sntp
ike
xot
Digi TransPort WR Routers User Guide
Std. Port Service
20 File Transfer Protocol data port
21 File Transfer Protocol control port
23 Telnet server port
25 SMTP server port
80 Web server port
110 Mail server port
123 NTP server port
500 Source/destination port for IKE key
1998 Destination port for XOT packets
Firewall
698