12/20/11 888-2595-001 A-3
WARNING: Disconnect primary power prior to servicing.
Appendix A - FM Web Remote Option
ZX Series
A.2 Installation
A.2.1 Internet Security
The FM Web Remote is designed for use in a LAN environment. It has a moderate
level of password protection but does not employ packet encryption. Accordingly, it
should not be hooked directly to the Internet without additional precautions being taken.
A typical application of the web remote is at a remote transmitter site, but as part of a
'virtual LAN' (VPN) with connection via special routers employing encryption chosen
by the LAN owner/operator. The web remote remains connected to the router with a
fixed IP address and fixed port forwarding. The web remote uses these ports.
• HTTP: 80
• SNMP: 161
• SNMP Trap: 162
• SMTP: 25
The port selections given above are fixed. If two or more web remotes are to be used
behind a single firewall, it will be necessary to use a router with port address translation
and assign each web remote its own HTTP port (e.g. 8080. 8081, 8082, etc.)
With this type of installation, the router owns the external IP address and a domain
name, if desired. The web remote port is simply appended to the router IP address with
a colon.
e.g.
• http://myharristransmitter.com:8081
• http://69.234.123.78:8081
The port number may be omitted if it is the default value of 80.
The internal e-mail (SMTP) notification routine does not provide for username/
password authentication to access an SMTP server. If no SMTP server is available,
small PC-based SMTP servers are available for approximately US $50. PostCast
Server by Gate Comm Software would be a good example. When necessary, the e-mail
notification generated by the web remote may be forwarded by the local SMTP server
and/or other intermediate servers in order to add password protection or circumvent a
DNS (spam) blacklist for a particularly demanding recipient.
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