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Rodster2000
0 pts.
 RDC Connection Keeps Dropping. High PING.
Tech support, Hardware, Networking, Performance management, Routers, Cabling, Software, Ping
We have an RDC connection that keeps getting dropped. We have run ping plotter and it keeps showing a high ping at time of drop. We have tried everything we know to do and needing some help. We have replaced the router,switches,ISP. Have run Adaware SE and Norton System Works 2006 on all the workstations found nothing wrong. Checked all the cables and all tested just fine. Setup a New workstation in place that was just loaded with Windows XP Pro and still had the problems. From the main office we can connect to the ASP location and stay connected for over 24Hours without a drop. But not from this local office we get dropped 4 to 5 times a day. Any help would be appreciated.
ASKED: Oct 4, 2006  11:25 AM GMT
UPDATED: October 10, 2006  3:53:36 PM GMT
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PatJohn
0 pts.
Answer Wiki:
Are you using a VPN connection? What type of wire connection (T1, DSL, SDN,etc.)is being used? Is this a shared connection among the work stations or does each one have it's own line?

If you are using a VPN over an open shared line (such as DSL)and a device is also using the same line without the VPN, then the server would detect this as a security problem and disconnect.

For example, if work station A is connected through the VPN via DSL and work station B has not connected to the VPN but accesses the internet, then the server would close the VPN connection. This would also happen if the phone system uses the same line - when someone makes a phone call the server closes the VPN.

I hope this helps.
Last Wiki Answer Submitted:  Oct 5, 2006  7:39 AM (GMT)  by  PatJohn   0 pts.
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A little to add to PatJohn’s post. The vpn we use at work has a time out feature to keep users from camping on the device. The network itself, DHCP lease time, backups, strange user behavior, etc., could also cause such issues. The wire to the premises. Too many issues to tackle all at once. Since you have already eliminated all of the obvious possibilities, it usually ends up as some small, overlooked feature or function somewhere within one of the networks.

larrythethird
 0 pts.
 

Are you using the same ISP for both connections? If so, they should be helping you. If nothing else they can tell if it is you dropping the connection or are they having problems in that area.

Are you using a router / firewall setup to direct traffic from your local network or a more causal connection.

paul144hart
 0 pts.
 

I Had a similar problem so I set up a ping to the ISP’s DNS server. I was lucky in that the ISP allowed ping to their DNS.

I found that it was the internet connection that was the problem and armed with this data I took it up with the ISP. Even though you have changed ISP you may find that your actual data comes from the same source as often ISP’s use the same wholesaler.

Good luck!

Ursulus

ursulus
 0 pts.
 

Have you checked the service time-out for the port that RDC uses through the firewall? If you increase the time out to 720 minutes (12 hours) you might find the firewall no longer cuts off the connection. NB do not set to ‘never time-out’ as this will cause session overloads.

RoryDavies
 0 pts.
 

Hi Rodster2000,

I think its due to the MTU(Maximum Tranmission Unit) problem. Please check with your ISP.

Please find below the document..

http://www.erg.abdn.ac.uk/users/gorry/course/inet-pages/mtu.html

http://support.microsoft.com/kb/826159

Regards,
Nitheel.

Nitheel
 0 pts.
 

Have you tried using a sniffer like WireShark (a free GUI) that presents an excellent display of that actual TCP/UDP exchanges between source and destination? If you can interpret the data, you should see what is happening at the time of the drop. This can’t help but point to the culprit as it provides IP addresses of source, destination, TCP/IP protocol, info on events, time of event. Do a google on Wireshark and download the free version. Whenever I’ve had a problem, this tool was invaluable.

If you are indeed having a problem with, say MTU, this would show up. Try it!

Malcolm/rising star

risingstar
 0 pts.
 

Thank you for all your feedback! Let me give these a shot and see if we can get this resolved.

Rodster2000
 0 pts.