User guide

CHAPTER 5: Types of Services
58 WatchGuard Firebox System 6.0
Filtered-SMTP
Filtered SMTP allows SMTP traffic (e-mail) without using the SMTP
proxy. One use of Filtered-SMTP eliminates the need for outgoing mail to
be routed through the SMTP proxy twice. With the Filtered SMTP icon
between the trusted network and the mail server on the optional network,
mail is only proxied when it is outbound to the Internet.
Characteristics
•Protocol: TCP
• Server Port(s): 25
• Client Port(s): client
finger
finger is a protocol used to list information about users on a given host.
Although this information is often useful, it can also reveal too much
information that can be abused.
WatchGuard does not recommend putting finger servers on the Trusted
interface.
Characteristics
•Protocol: TCP
• Server Port(s): 79
• Client Port(s): greater than 1023
Common Scenario
Description
There is a specially built finger server running on the Optional
interface.
Icons in the Services Arena
A finger service icon–Incoming allow from Any to the Optional
finger server.