AVIRA ANTIVIR UNIX WEBGATE, User Manual

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Configuration
Avira GmbH AntiVir WebGate
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means that the Clients have no direct connection to the FTP servers, but to
WebGate. In order for WebGate to make a substitute connection to FTP servers,
you need to specify the address and the name of the FTP servers. WebGate must
receive this information from FTP Clients at login with the
USER
command:
USER <username>@<host>[:<port>]
Compared to making a direct connection to FTP server, the connection through
WebGate also needs, apart from the user name at login, the host name – separated
with the @ character from the user name – or the IP address (optionally with port)
of the FTP server.
Example This example illustrates the login procedure, when using a standard Unix FTP
Client:
Assumption: WebGate runs on a machine with the IP address
192.168.0.1
and
receives inquiries from FTP Clients on port 2121. You should establish a
connection to a remote FTP server with the IP address
10.0.0.1
, the user name
"foo" and the password "bar".
$ ftp 192.168.0.1 2121
Connected to 192.168.0.1.
220 AntiVir WebGate FTP proxy. Login with <user-
name>@<host>[:<port>]
Name (192.168.0.1:user): foo@10.0.0.1
331 Password required for foo.
Password: bar
230 User foo logged in.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp>
On login, the FTP Client should be used just as before, i. e. when it was not using
WebGate. WebGate acts as proxy between FTP Client and FTP server and scans the
transferred data.
Optionally, WebGate allows a parent FTP proxy. For example, it can be set in
avwebgate.conf as follows:
FTPProxyServer 127.0.0.1
FTPProxyPort 2121
In this case, WebGate does not communicate directly to the FTP server, but with
the indicated parent FTP proxy. Thus, more FTP servers can operate consecutively.
In order to avoid Client timeouts during the transfer of larger files, WebGate sends
Keepalive messages to the Client. The time interval is the value of
Many FTP Clients allow FTP proxy configuration. This enables a certain transparency of
WebGate towards the user, i. e. the user senses no difference at login, when using the FTP
Client with or without proxy.