A proxy (also known as a proxy server) is a server that sits
between a client application, such as a Web browser,
and a real server. It intercepts all requests
to the real server to see if it can fulfill the
requests itself. If not, it forwards the request
to the real server. Proxies improve performance
and filter requests.
Proxies provide a measure of safety by hiding internal LAN
addresses from the outside Internet. In a proxy
environment, network requests from multiple clients
appear to the outsider as all coming from the
same proxy server address. Different proxies may
be used to support multiple internet protocols.
Most of the time, network administrators
will configure the proxies to serve all protocols
to avoid any confusion.
If you use a proxy to access FTP sites, specify the proxy in
the e-Surveiller Station settings so that the
e-Surveiller Station will be able to upload and
download logs, configurations and Monitor installers
to and from FTP sites.
If a Monitored computer uses a proxy to access web (HTTP) and
FTP sites and you need the Monitor to upload logs
to an FTP site or to download new configurations
from web or FTP sites. Specify the FTP and HTTP
proxies when generating the Monitor (by generating
a custom Monitor) or by updating the Monitor.
To specify a proxy, two pieces of information are needed. First,
the host identifier is either the host's network
name or the host's IP address. Second, the port
number is the TCP/IP port on which the proxy listens
for requests.
A single port number is generally used for all of the supported
protocols. This port should not be confused with
the standard ports used by the protocols themselves
(port 80 for HTTP, port 21 for FTP, and so on).
Contact your network administrator for the proxy host and port
number.
