I am on win2000 server, behind some ISA proxy I think. For other programs I get past the proxy like :

http server: proxy.domain.local port 8080
user: domain\loginname
password: loginpassword

these proxy settings work with other programs

My thinking is that clamwin doesn't parse the username in the right way. Maybe it can't handle a slash, I also have an underscore in my username. Or otherwise maybe http proxies don't work at all.

ClamAV update process started at Mon Aug 10 11:13:52 2009
Connecting via proxy.collusie.local
main.cvd is up to date (version: 51, sigs: 545035, f-level: 42, builder: sven)
Connecting via proxy.collusie.local
WARNING: getfile: Unknown response from remote server (IP: 10.240.0.6)
WARNING: getpatch: Can't download daily-9552.cdiff from database.clamav.net
WARNING: getfile: Unknown response from remote server (IP: 10.240.0.6)
WARNING: getpatch: Can't download daily-9552.cdiff from database.clamav.net
WARNING: getfile: Unknown response from remote server (IP: 10.240.0.6)
WARNING: getpatch: Can't download daily-9552.cdiff from database.clamav.net
WARNING: getfile: Unknown response from remote server (IP: 10.240.0.6)
WARNING: Can't download daily.cvd from database.clamav.net
Trying again in 5 secs...