PPP protocol error using SSTP native windows connection

[akournitsky]

Hello everybody!

There is still no fix for this issue in several topics on the forum as I can see, but here is my situation anyway for better understanding:

Via vpnazure I'm trying to connect using SSTP native windows connection. I pass all password's checks, get all attributes from remote network DHCP, get status "connected" and during the next phase named "identification" within 5-10 seconds I get "PPP protocol error" and disconnection.

SoftEther client with the same settings from the same computer works fine.


What I see on server's side:
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2015-10-14 15:05:15.441 On the TCP Listener (Port 0), a Client (IP address ***.***.***.***, Host name "InternetProviderName", Port number 55890) has connected.
2015-10-14 15:05:15.441 For the client (IP address: ***.***.***.***, host name: "InternetProviderName", port number: 55890), connection "CID-315-F93F3FE8DE" has been created.
2015-10-14 15:05:15.441 SSL communication for connection "CID-315-F93F3FE8DE" has been started. The encryption algorithm name is "RC4-MD5".
2015-10-14 15:05:16.720 SSTP PPP Session [***.***.***.***:55890]: A new PPP session (Upper protocol: SSTP) is started. IP Address of PPP Client: ***.***.***.*** (Hostname: "InternetProviderName"), Port Number of PPP Client: 55890, IP Address of PPP Server: 192.168.0.232, Port Number of PPP Server: 57315, Client Software Name: "Microsoft SSTP VPN Client", IPv4 TCP MSS (Max Segment Size): 0 bytes
2015-10-14 15:05:18.904 On the TCP Listener (Port 0), a Client (IP address ***.***.***.***, Host name "InternetProviderName", Port number 55890) has connected.
2015-10-14 15:05:18.904 For the client (IP address: ***.***.***.***, host name: "InternetProviderName", port number: 55890), connection "CID-316-9F95D6EB1E" has been created.
2015-10-14 15:05:18.904 SSL communication for connection "CID-316-9F95D6EB1E" has been started. The encryption algorithm name is "(null)".
2015-10-14 15:05:18.919 [HUB "VPNHubName"] The connection "CID-316-9F95D6EB1E" (IP address: ***.***.***.***, Host name: InternetProviderName, Port number: 55890, Client name: "Microsoft SSTP VPN Client", Version: 4.19, Build: 9582) is attempting to connect to the Virtual Hub. The auth type provided is "External server authentication" and the user name is «VpnHubUserName».
2015-10-14 15:05:18.935 [HUB "VPNHubName"] Connection "CID-316-9F95D6EB1E": Successfully authenticated as user «VpnHubUserName».
2015-10-14 15:05:18.935 [HUB "VPNHubName"] Connection "CID-316-9F95D6EB1E": The new session "SID-UsNm-[SSTP]-24" has been created. (IP address: ***.***.***.***, Port number: 55890, Physical underlying protocol: "Legacy VPN - SSTP")
2015-10-14 15:05:18.935 [HUB "VPNHubName"] Session "SID-UsNm-[SSTP]-24": The parameter has been set. Max number of TCP connections: 1, Use of encryption: Yes, Use of compression: No, Use of Half duplex communication: No, Timeout: 20 seconds.
2015-10-14 15:05:18.935 [HUB "VPNHubName"] Session "SID-UsNm-[SSTP]-24": VPN Client details: (Client product name: "Microsoft SSTP VPN Client", Client version: 419, Client build number: 9582, Server product name: "SoftEther VPN Server (64 bit)", Server version: 419, Server build number: 9582, Client OS name: "Microsoft SSTP VPN Client", Client OS version: "-", Client product ID: "-", Client host name: "InternetProviderName", Client IP address: "***.***.***.***", Client port number: 55890, Server host name: "192.168.0.232", Server IP address: "192.168.0.232", Server port number: 57315, Proxy host name: "", Proxy IP address: "0.0.0.0", Proxy port number: 0, Virtual Hub name: "VPNHubName", Client unique ID: "2BDD50D52367DA4D5EBFABF2632FDC74")
2015-10-14 15:05:19.887 SSTP PPP Session [***.***.***.***:55890]: Trying to request an IP address from the DHCP server.
2015-10-14 15:05:21.899 [HUB "VPNHubName"] Session "SID-LOCALBRIDGE-14": The DHCP server of host "88-5A-92-EA-06-06" (192.168.0.1) on this session allocated, for host "SID-UsNm-[SSTP]-24" on another session "CA-70-B5-82-AA-F6", the new IP address 192.168.0.182.
2015-10-14 15:05:21.899 SSTP PPP Session [***.***.***.***:55890]: An IP address is assigned. IP Address of Client: 192.168.0.182, Subnet Mask: 255.255.255.0, Default Gateway: 192.168.0.1, Domain Name: "", DNS Server 1: 192.168.0.10, DNS Server 2: 192.168.0.1, WINS Server 1: 0.0.0.0, WINS Server 2: 0.0.0.0, IP Address of DHCP Server: 192.168.0.1, Lease Lifetime: 684000 seconds
2015-10-14 15:05:21.899 SSTP PPP Session [***.***.***.***:55890]: The IP address and other network information parameters are set successfully. IP Address of Client: 192.168.0.182, Subnet Mask: 255.255.255.0, Default Gateway: 192.168.0.1, DNS Server 1: 192.168.0.10, DNS Server 2: 192.168.0.1, WINS Server 1: 0.0.0.0, WINS Server 2: 0.0.0.0
2015-10-14 15:05:33.599 SSTP PPP Session [***.***.***.***:55890]: A PPP protocol error occurred, or the PPP session has been disconnected.
2015-10-14 15:05:33.599 [HUB "VPNHubName"] Session "SID-UsNm-[SSTP]-24": The session has been terminated. The statistical information is as follows: Total outgoing data size: 168727 bytes, Total incoming data size: 1424 bytes.
2015-10-14 15:05:33.630 Connection "CID-315-F93F3FE8DE" terminated by the cause "Connection has been disconnected." (code 3).
2015-10-14 15:05:33.630 Connection "CID-315-F93F3FE8DE" has been terminated.
2015-10-14 15:05:33.630 The connection with the client (IP address ***.***.***.***, Port number 55890) has been disconnected.
2015-10-14 15:05:33.630 Connection "CID-316-9F95D6EB1E" terminated by the cause "The VPN session has been deleted. It is possible that either the administrator disconnected the session or the connection from the client to the VPN Server has been disconnected." (code 11).
2015-10-14 15:05:33.630 Connection "CID-316-9F95D6EB1E" has been terminated.
2015-10-14 15:05:33.630 The connection with the client (IP address ***.***.***.***, Port number 55890) has been disconnected.

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[thisjun]

Could you show a client log?