I tried both haproxy + ocserv and ocserv, same error. Anyone else met this? iOS 9.1, AnyConnect 3.0.12169 debug log: ocserv[22505]: worker: 1.1.1.1 HTTP processing: User-Agent: AnyConnect AppleSSLVPN_Darwin_ARM (iPhone) 3.0.12169 ocserv[22505]: worker: 1.1.1.1 User-agent: 'AnyConnect AppleSSLVPN_Darwin_ARM (iPhone) 3.0.' ocserv[22505]: worker: 1.1.1.1 HTTP processing: Host: xxxxxxx:443 ocserv[22505]: worker: 1.1.1.1 HTTP processing: Accept: */* ocserv[22505]: worker: 1.1.1.1 HTTP processing: Accept-Encoding: identity ocserv[22505]: worker: 1.1.1.1 HTTP processing: X-Transcend-Version: 1 ocserv[22505]: worker: 1.1.1.1 HTTP processing: X-Transcend-Version: 1 ocserv[22505]: worker: 1.1.1.1 HTTP processing: X-AnyConnect-Identifier-ClientVersion: 3.0.12169 ocserv[22505]: worker: 1.1.1.1 HTTP processing: X-AnyConnect-Identifier-Platform: apple-ios ocserv[22505]: worker: 1.1.1.1 HTTP processing: X-AnyConnect-Identifier-PlatformVersion: 9.1 ocserv[22505]: worker: 1.1.1.1 HTTP processing: X-AnyConnect-Identifier-DeviceType: iPhone6,2 ocserv[22505]: worker: 1.1.1.1 HTTP processing: X-AnyConnect-Identifier-Device-UniqueID: xxxxxxxx ocserv[22505]: worker: 1.1.1.1 HTTP processing: X-Aggregate-Auth: 1 ocserv[22505]: worker: 1.1.1.1 HTTP processing: Connection: close ocserv[22505]: worker: 1.1.1.1 HTTP processing: Content-Length: 433 ocserv[22505]: worker: 1.1.1.1 HTTP processing: Content-Type: application/x-www-form-urlencoded ocserv[22505]: worker: 1.1.1.1 HTTP POST /VPN ocserv[22505]: worker: 1.1.1.1 unexpected POST URL /VPN sskaje at gmail.com https://sskaje.me/