3Com 3CR3MFA-92 Installation Manual - page 12
12
C
HAPTER
1: P
RE
-
INSTALLATION
T
ASKS
■
Administrator Email Address — Enter an email address for the
administrator of this 3Com Email Firewall. Notifications will go to this
email address.
■
Proxy — Enter an optional proxy server if you use one on your
network. If you use a proxy server, this is required for Anti-Virus,
Anti-Spam, and Licensing updates to work properly. Enter the address
in the format https://hostname:port, such as:
https://proxy.example.com:8080
■
Proxy Username and Password — Enter a username and password for
the proxy server.
Modifying the
Firewall/Router
Configuration
For the 3Com Email Firewall to function properly, various networking
ports or proxies must be configured on your firewall or router.
The following table describes the list of ports required:
Table 3 Firewall/Router Port Configuration
Port
Description
From
Internet
To
Internet
From
Internal
Network
To
Internal
Network Protocol
21
FTP for
system
backups
✓
TCP
25
SMTP
✓
✓
✓
✓
TCP
53
DNS
✓
✓
UDP/TCP
80
Anti-Virus
Updates
✓
TCP
123
NTP
(Network
Time
Protocol)
✓
✓
UDP
443
Security
Connection
✓
TCP
443
Secure
Admin
✓
✓
TCP
514
Syslog
✓
UDP
6277
DCC
✓
UDP