* Luca Gibelli <l...@clamav.net>:

> Most likely your proxy is issuing a HTTP/1.0 request upstream?

Could you PLEASE check the server's logs?

We're definitely sending HTTP/1.1 requests with all the headers, see
below:

output from tcpdump:

GET /sendfp.cgi HTTP/1.1
Host: cgi.clamav.net
Pragma: no-cache
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.19 (KHTML, like 
Gecko) Ubuntu/12.04 Chromium/18.0.1025.168 Chrome/18.0.1025.168 Safari/535.19
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding: gzip,deflate,sdch
Accept-Language: de,en;q=0.8,en-US;q=0.6
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: __utma=165234925.7124351.1326790435.1336028009.1336053668.11; 
__utmz=165234925.1326790435.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)
Via: 1.1 proxy-cbf-1 (squid/3.1.19-20120418-r10444)
X-Forwarded-For: unknown
Cache-Control: max-age=0
Connection: keep-alive

answer:

HTTP/1.1 503 Service Unavailable
Server: Varnish
Content-Type: text/html; charset=utf-8
Retry-After: 5
Content-Length: 284
Accept-Ranges: bytes
Date: Fri, 04 May 2012 10:29:21 GMT
X-Varnish: 221993613
Age: 0
Via: 1.1 varnish
Connection: close

-- 
Ralf Hildebrandt                   Charite Universitätsmedizin Berlin
ralf.hildebra...@charite.de        Campus Benjamin Franklin
http://www.charite.de              Hindenburgdamm 30, 12203 Berlin
Geschäftsbereich IT, Abt. Netzwerk fon: +49-30-450.570.155
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