Virus And Worm Protection; Web Content Filtering - D-Link DFL-500 User Manual

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IPSec and PPTP VPN pass through so that computers or subnets on your internal network can connect
to a VPN gateway on the Internet

Virus and worm protection

D-Link's DFL-500 secure gateway solution adds anti-virus and anti-worm functionality to conventional VPN
and firewall security. Virus and worm protection screens the information found in web (HTTP protocol) and
email content (SMTP, POP3, and IMAP protocols) for the following types of target files:
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Executable files (exe, bat, and com)
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Visual basic files (vbs)
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Compressed files (zip, gzip, tar, hta, and rar)
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Screen saver files (scr)
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Dynamic link libraries (dll)
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MS Office files
You can configure DFL-500 virus scanning to block the target files or scan them for viruses and worms. You
can configure three levels of virus protection:
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High level protection removes target files from HTTP transfers and email attachments before they pass
through the firewall
With high level protection turned on, the DFL-500 does not perform virus scanning. Instead, all files and
attachments are identified and removed from content protocol data streams.
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Medium level protection scans all target files for viruses
You can configure the virus scanning engine to perform up to four different types of virus scans on each
target file.
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Low level protection temporarily suspends virus protection
All target files are forwarded unchanged to their destinations.
You can also configure worm scanning to look for filenames known to be used by worms. For example, the
Nimda worm uses files named readme.exe and sample.exe.
DFL-500 content virus and worm prevention is transparent to the end user. Client and server programs
require no special configuration, and D-Link high-performance hardware and software ensure there are no
noticeable download delays.

Web content filtering

Using Web content filtering, you can screen for three types of web content:
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Unwanted content such as adult sites
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Unwanted URLs such as stock quote/trading sites
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Unsecure web content such as:
Java Applets
Cookies
Malicious Scripts
ActiveX
Site blocking is accomplished by scanning URLs or web pages for user defined patterns.
DFL-500 User's Manual
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