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Concepts for SonicWALL SSL VPN
Furthermore, only compressed content is cached, saving nearly 40-50% of the required
memory. Note that gzip compression is not available on the local (clear text side) of the SSL-
VPN appliance, or for HTTPS requests from the remote client.
Telnet (Java)
A Java-based Telnet client delivered through the remote user's Web browser. The remote
user can specify the IP address of any accessible Telnet server and SonicWALL SSL VPN
will make a connection to the server. Communication between the user over SSL and the
server is proxied using native Telnet. The Telnet applet supports MS JVM (Microsoft Java
Virtual Machine) in Internet Explorer, and requires Sun Java Runtime Environment (JRE) 1.1
or higher for other browsers.
SSHv1 and SSHv2 (Java)
Java-based SSH clients delivered through the remote user's Web browser. The remote user
can specify the IP address of any accessible SSH server and SonicWALL SSL VPN will
make a connection to the server. Communication between the user over SSL and the server
is proxied using natively encrypted SSH. The SSHv1 applet supports MS JVM in Internet
Explorer, and requires SUN JRE 1.1 for other browsers. SSHv2 provides stronger
encryption and has other advanced features, and can only connect to a server that supports
SSHv2. SSHv2 support sets the terminal type to VT100. SSHv2 requires JRE 1.6.0_10 or
higher, available from http://java.sun.com.
FTP (Web)
Proxy access to an FTP server on the internal network, the Internet, or any other network
segment that can be reached by the SSL-VPN appliance. The remote user communicates
with the SSL-VPN appliance by HTTPS and requests a URL that is retrieved over HTTP by
SonicWALL SSL VPN, transformed as needed, and returned encrypted to the remote user.
FTP supports 25 character sets, including four Japanese sets, two Chinese sets, and two
Korean sets. The client browser and operating system must support the desired character
set, and language packs may be required.
File Shares (CIFS)
File Shares provide remote users with a secure Web interface to Microsoft File Shares using
the CIFS (Common Internet File System) or the older SMB (Server Message Block)
protocols. Using a Web interface similar in style to Microsoft's familiar Network
Neighborhood or My Network Places, File Shares allow users with appropriate permissions
to browse network shares, rename, delete, retrieve, and upload files, and to create
bookmarks for later recall. File shares can be configured to allow restricted server path
access.
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SonicWALL SSL VPN 4.0 Administrator's Guide
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Troubleshooting
