Error 500 while going through squid 2.2STABLE4

[Stephan Menzel]

Hello,

i was experimenting with httptunnel and so i used 
MacGyvers RPMs to install hts on my linux box at home. Using the original 
scripts i made a second tunnel for troubleshooting purposes.
Both of them have their own port and their own start script and so on.
Intention was the use of ssh to go to my home computer through a FW.
Because there will be some days until i return and the connection is important 
i built in an additional security crontab entry which will stop hts in the 
evening and restart it in the morning. Just to be sure.

Yesterday i tried it locally (over my own squid 2.4) and it worked very fine, 
but whenever i closed the connection, i couldn't open a new one until i 
restarted hts. That's why i made the second tunnel to restart the first one in 
that cases.
But now, today, behind the FW (squid 2.2.STABLE4) i started the first session 
and i was very pleased because it worked fine. Better than i expected. So i 
hoped that my wonderful 'computer prison' now has a window, restarted the hts 
server and just in this moment the connection interrupted. Just as i expected.
And unfortunately, now i am not able to open a new one. Not even on the second 
tunnel.
When i start htc on this WinNT machine nothing seems wrong, but when i open the 
ssh client (Putty) the following errors (D4) occur:


20020402 175850 htc (httptunnel) 3.0 started with arguments:
20020402 175850   me = htc
20020402 175850   device = (null)
20020402 175850   host_name = x.x.x.x
20020402 175850   host_port = 9998
20020402 175850   proxy_name = x.x.x.x
20020402 175850   proxy_port = 80
20020402 175850   proxy_buffer_size = 0
20020402 175850   proxy_buffer_timeout = -1
20020402 175850   content_length = 102400
20020402 175850   forward_port = 22
20020402 175850   max_connection_age = 300
20020402 175850   strict_content_length = 0
20020402 175850   keep_alive = 5
20020402 175850   proxy_authorization = (null)
20020402 175850   user_agent = (null)
20020402 175850   debug_level = 4
20020402 175850         server_socket (22) = 0
20020402 175850         waiting for connection on port 22
20020402 175902         wait_for_connection_on_socket (0) = 1
20020402 175902         creating a new tunnel
20020402 175902             tunnel_new_client ("x.x.x.x", 9998, "x.x.x.x", 80, 
102400)
20020402 175902             tunnel_connect()
20020402 175902         tunnel_out_setsockopts: non-fatal SO_SNDLOWAT error: 
This option is unsupported
20020402 175902         tunnel_out_setsockopts: non-fatal SO_SNDLOWAT: 1
20020402 175902         tunnel_out_setsockopts: SO_LINGER: onoff=1 linger=2000
20020402 175902         tunnel_out_setsockopts: non-fatal TCP_NODELAY: 1
20020402 175902         tunnel_out_setsockopts: SO_KEEPALIVE: 1
20020402 175902             http_write_request: POST 
http://x.x.x.x:9998/index.html HTTP/1.1


20020402 175902         tunnel_out_connect: output connected
20020402 175902         tunnel_write_request: TUNNEL_OPEN (1)
20020402 175902             tunnel_in_connect()
20020402 175902         tunnel_in_setsockopts: non-fatal SO_RCVLOWAT error: 
This option is unsupported
20020402 175902         tunnel_out_setsockopts: SO_RCVLOWAT: 1
20020402 175902             http_write_request: GET 
http://x.x.x.x:9998/index.html HTTP/1.1


20020402 180111             http_parse_response: major version = 1
20020402 180111             http_parse_response: minor version = 0
20020402 180111             http_parse_response: status code = 500
20020402 180111             http_parse_response: status message = "Internal 
Server Error"
20020402 180111             parse_header: Server: Squid/2.2.STABLE4
20020402 180111             parse_header: Mime-Version: 1.0
20020402 180111             parse_header: Date: Tue, 02 Apr 2002 15:58:39 GMT
20020402 180111             parse_header: Content-Type: text/html
20020402 180111             parse_header: Content-Length: 717
20020402 180111             parse_header: Expires: Tue, 02 Apr 2002 15:58:39 GMT
20020402 180111             parse_header: X-Squid-Error: ERR_READ_ERROR 131
20020402 180111             parse_header: X-Cache: MISS from proxy
20020402 180111             parse_header: X-Cache-Lookup: MISS from proxy:80
20020402 180111             parse_header: Age: 0
20020402 180111             parse_header: X-Cache: MISS from proxy
20020402 180111             parse_header: X-Cache-Lookup: HIT from proxy:80
20020402 180111             parse_header: Proxy-Connection: close
20020402 180111     tunnel_in_connect: HTTP error 500
20020402 180111     http_error_to_errno: HTTP error -500
20020402 180111     couldn't open tunnel: I/O error
20020402 180111 exit with status = 1

Those messages appear after about a minute timeout.
I tried another port without a tunnel and there was an immedate disconnection 
so i think there must be still something listening on port 9998. But why isn't 
it working?

Anyone got ideas?

Please not that i am not part of the mailing list.
My adress is: stephan-menzel@web.de

Very nice greetings...

Stephan



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