High CPU usage on SSTP and mikrotik problem

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lex
Posts: 3
Joined: Tue Jun 04, 2013 8:49 pm

High CPU usage on SSTP and mikrotik problem

Post by lex » Tue Jun 04, 2013 9:02 pm

Hello. First of all, thanks for that amazing software.
Found it hour ago and decided to give it a try, basic config went smooth and i was able to connect by SSTP, but after that..
vpnserver spawns around 10 threads when single client (my test WinServer2012 box) connects to it. Is that normal?
On that time, connection is very slow and cpu usage stalling at 100% unless i disconnect.
Log is filled with "2013-06-04 22:52:09.128 [HUB "vanaheim"] SecureNAT: The UDP session 20584 was created. Connection source my_server_ip:33454, Connection destination 255.255.255.255:1900"
AFAIK 1900 is SSDP port. It creates several thousands (!) of similar connections. And then drops them after several seconds.
Sometimes i also see same messages about port 138 (netbios?)

Related second part, there is Mikrotik RouterOS, which is basically linux-based router. I'm unable to connect from that mikrotik to softether server. Logs:
[code]
2013-06-04 22:59:24.731 On the TCP Listener (Port 443), a Client (IP address my_client_ip, Host name "my_client_ip", Port number 46188) has connected.
2013-06-04 22:59:24.731 For the client (IP address: my_client_ip, host name: "my_client_ip", port number: 46188), connection "CID-31" has been created.
2013-06-04 22:59:24.782 SSL communication for connection "CID-31" was started. The encryption algorithm name is "AES256-SHA".
2013-06-04 22:59:24.883 SSTP PPP Session [my_client_ip:46188]: A new PPP session (Upper protocol: SSTP) is started. IP Address of PPP Client: my_client_ip (Hostname: "my_client_ip"), Port Number of PPP Client: 46188, IP Address of PPP Server: my_server_ip, Port Number of PPP Server: 443, Client Software Name: "Microsoft SSTP VPN Client", IPv4 TCP MSS (Max Segment Size): 0 bytes
2013-06-04 22:59:24.913 SSTP PPP Session [my_client_ip:46188]: A PPP protocol error occurred, or the PPP session was disconnected.
2013-06-04 22:59:24.944 Connection "CID-31" terminated by the cause "Connection was disconnected." (code 3).
2013-06-04 22:59:24.944 Connection "CID-31" was terminated.
2013-06-04 22:59:24.944 The connection with the client (IP address my_client_ip, Port number 46188) was disconnected.
[/code]
(Server was verified working with WinServer2012 client)

cedar
Site Admin
Posts: 2070
Joined: Sat Mar 09, 2013 5:37 am

Re: High CPU usage on SSTP and mikrotik problem

Post by cedar » Thu Jun 06, 2013 2:52 pm

Did you enable both of the SecureNAT and the Local-bridge?
Please stop one of these.

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