Telnet session disconnects abruptly Post: 302954935

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Operating Systems SCO Telnet session disconnects abruptly Post 302954935 by sean6605 on Sunday 13th of September 2015 11:25:05 AM

09-13-2015

Registered User

I wanted to thank everyone that has helped me along the way, especially JGT for your guidance.
I wanted to update the forum with the resolution to the issue.
In the end the disconnect was not a result of the SCO Openserver 6 server but was the McAfee Total Protection on the clients computers.
This was only found after doing wireshark packet captures which showed that there were several retransmit packet errors just before the disconnect.
These re-transmits showed that the communication toward the client computer was not getting through.
After checking the security history of the McAfee firewall there were entries that the McAfee firewall was seeing the telnet session as an unwanted connection even though the client computer had initiated the connection and the firewall allowed it through.
It appears that after a period of inactivity the McAfee Firewall would close the socket.
I have not found a setting in the McAfee to disallow this. The telent client is an allowed program in the McAfee Firewall as well.
In the end I needed to add the server IP address (which is in the same subnet as all of the client computers, no router of any kind in between the client computers and the server) into the Firewall as allowed on all ports. Since adding in this exception there has not been a disconnect to the users.
Again thank you for all of the assistance on this issue.

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LEARN ABOUT DEBIAN

vdetelweb

VDETELWEB(1)						      General Commands Manual						      VDETELWEB(1)

NAME

       vdetelweb - Virtual Distributed Ethernet Telnet and/or Web management module

SYNOPSIS

       vdetelweb [ --web ] [ --telnet ] [ --nodename nodename ] [ --daemon ] [ --rcfile rcfile ] mgmt_socket

DESCRIPTION

       vdetelweb implements a tiny telnet server and/or a tiny web server for the remote management of a VDE2 switch.

OPTIONS

       -w, --web
	      start the web server. At least one of --web or --telnet must be set.

       -t, --telnet
	      start the telnet server. At least one of --web or --telnet must be set.

       -n, --nodename nodename
	      specify  the  nodename as seen from remote connections (e.g. in the command prompt or in the web page title). uname nodename is used
	      when this option is not specified.

       -d, --daemon
	      run as a daemon, using syslog for logging.

       -f, --rcfile rcfile
	      rc file to set the initial switch configuration.	When not specified, vdetelweb searches for ~/.vde/vdetelwebrc and /etc/vde/vdetel-
	      webrc. At leas one rc file must exist and be readable.

       -h, --help
	      print help. please use it for a more complete list of options.

       mgmt_socket
	      is  the  managemnt  socket  used to communicate with the vde_switch.  (This option must match the path used in the -M option for the
	      vde_switch).

NOTICE

       Virtual Distributed Ethernet is not related in any way with www.vde.com ("Verband der Elektrotechnik, Elektronik  und  Informationstechnik"
       i.e. the German "Association for Electrical, Electronic & Information Technologies").

SEE ALSO

       vde_switch(1), vde_plug(1), vdeq(1).  dpipe(1).	unixterm(1).

AUTHOR

       VDE is a project by Renzo Davoli <renzo@cs.unibo.it>

Virtual Distributed Ethernet					   June 16, 2008						      VDETELWEB(1)