Hi, I'm using Bluecoat K9 web filter. When I try to update the virus definitions, I get the following message:

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freshclam 0.91.2 (OS: win32, ARCH: x86, CPU: i686)
ClamAV update process started at Mon Dec 10 13:33:00 2007
WARNING: Invalid DNS reply. Falling back to HTTP mode.
Reading CVD header (main.cvd): OK

main.cvd updated (version: 45, sigs: 169676, f-level: 21, builder: sven)
Reading CVD header (daily.cvd): OK


daily.cvd updated (version: 5077, sigs: 4876, f-level: 21, builder: ccordes)
Database updated (174552 signatures) from database.clamav.net (IP: 206.154.203.213)
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freshclam 0.91.2 (OS: win32, ARCH: x86, CPU: i686)
ClamAV update process started at Tue Dec 11 13:32:00 2007
WARNING: Invalid DNS reply. Falling back to HTTP mode.
Reading CVD header (main.cvd): ERROR: Unknown response from remote server
WARNING: Can't read main.cvd header from database.clamav.net (IP: 155.98.64.86)
Trying again in 5 secs...
ClamAV update process started at Tue Dec 11 13:32:15 2007
WARNING: Invalid DNS reply. Falling back to HTTP mode.
Reading CVD header (main.cvd): ERROR: Unknown response from remote server
WARNING: Can't read main.cvd header from database.clamav.net (IP: 155.98.64.86)
Trying again in 5 secs...
ClamAV update process started at Tue Dec 11 13:32:31 2007
WARNING: Invalid DNS reply. Falling back to HTTP mode.
Reading CVD header (main.cvd): ERROR: Unknown response from remote server
WARNING: Can't read main.cvd header from database.clamav.net (IP: 155.98.64.86)
Giving up on database.clamav.net...
Update failed. Your network may be down or none of the mirrors listed in freshclam.conf is working. Check https://www.clamav.net/support/mirror-problem for possible reasons.
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freshclam 0.91.2 (OS: win32, ARCH: x86, CPU: i686)
ClamAV update process started at Wed Dec 12 11:13:31 2007
WARNING: Invalid DNS reply. Falling back to HTTP mode.
Reading CVD header (main.cvd): ERROR: Unknown response from remote server
WARNING: Can't read main.cvd header from database.clamav.net (IP: 64.186.240.114)
Trying again in 5 secs...
ClamAV update process started at Wed Dec 12 11:13:48 2007
WARNING: Invalid DNS reply. Falling back to HTTP mode.
Reading CVD header (main.cvd): ERROR: Unknown response from remote server
WARNING: Can't read main.cvd header from database.clamav.net (IP: 64.186.240.114)
Trying again in 5 secs...
ClamAV update process started at Wed Dec 12 11:14:03 2007
WARNING: Invalid DNS reply. Falling back to HTTP mode.
Reading CVD header (main.cvd): ERROR: Unknown response from remote server
WARNING: Can't read main.cvd header from database.clamav.net (IP: 64.186.240.114)
Giving up on database.clamav.net...
Update failed. Your network may be down or none of the mirrors listed in freshclam.conf is working. Check https://www.clamav.net/support/mirror-problem for possible reasons.
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freshclam 0.91.2 (OS: win32, ARCH: x86, CPU: i686)
ClamAV update process started at Wed Dec 12 11:15:52 2007
WARNING: Invalid DNS reply. Falling back to HTTP mode.
Reading CVD header (main.cvd): Ignoring mirror 64.186.240.114 (due to previous errors)
WARNING: Can't read main.cvd header from database.clamav.net (IP: )
Trying again in 5 secs...
ClamAV update process started at Wed Dec 12 11:16:07 2007
WARNING: Invalid DNS reply. Falling back to HTTP mode.
Reading CVD header (main.cvd): Ignoring mirror 64.186.240.114 (due to previous errors)
WARNING: Can't read main.cvd header from database.clamav.net (IP: )
Trying again in 5 secs...
ClamAV update process started at Wed Dec 12 11:16:22 2007
WARNING: Invalid DNS reply. Falling back to HTTP mode.
Reading CVD header (main.cvd): Ignoring mirror 64.186.240.114 (due to previous errors)
WARNING: Can't read main.cvd header from database.clamav.net (IP: )
Giving up on database.clamav.net...
Update failed. Your network may be down or none of the mirrors listed in freshclam.conf is working. Check https://www.clamav.net/support/mirror-problem for possible reasons.


What is the exact website I have to add in to K9 in order to allow it to get the definitions?

Thank you.