Many thanks, now i know the problem and will find a way for that. I found this simple app useful: http://www.codeproject.com/KB/IP/HTTPSDebuggingProxy.aspx -- View this message in context: http://mono.1490590.n4.nabble.com/HttpListener-https-bug-tp2527913p2535559.html Sent from the Mono - Dev mailing list archive at Nabble.com.