Outgoing Lan To Lan Connection; Creating A Firewall - Lantronix SCS Reference Manual

Security

11.8.4 Outgoing LAN to LAN Connection

An SCS in Dallas must connect to an SCS in Seattle. The Dallas SCS must be configured in the following
manner:
The SCS in Dallas must have a site for the connection to the Seattle SCS. The site's name is seattle.
PPP will be used for the connection.
PAP authentication will be used.
To authenticate itself, the SCS in Dallas must send username dallas and password texas.
The following commands must be entered on the Dallas SCS:
Local>> DEFINE SITE seattle AUTHENTICATION PAP ENABLED
Local>> DEFINE SITE seattle AUTHENTICATION USERNAME dallas
Local>> DEFINE SITE seattle AUTHENTICATION REMOTE "texas"

11.8.5 Creating a Firewall

If your site involves an internet connection, it is a good idea to set up a firewall to augment current security.
A firewall prevents outside users from freely accessing your network by controlling which services on your
network are available to internet users.
A local network consists of addresses 192.0.1.0 through 192.0.1.24. Site irvine is used to manage
connections to this network. Irvine requires a firewall that does the following:
Prevents IP spoofing
Permits outgoing Telnet connections
Permits SMTP (Simple Mail Transfer Protocol) traffic to the local SMTP server, 192.0.1.102. The
backup SMTP server is 192.0.1.103
Permits NNTP (Network News Transfer Protocol) traffic between the local NNTP server,
192.0.1.104, and the remote NNTP server, 192.0.2.100
Permits outgoing FTP connections
Figure 11-58: Configuring Remote Site Authentication
11-30
Examples