Telnet disconnects randomly depending on internet (General questions)

We use the WODTELNETDLX client to connect users to our software. We have been experiencing problems at certain remote sites with only certain users. These users will get randomly disconnected after 10, 20 , 30 minutes and will have to reconnect.
We have the KEEPALIVES property set to 60 and the TIMEOUT property set to 0. Do you have any suggestions about what is occuring and how to prevent the problem ?
It is frustrating because it happens only at certain locations (generally those with cable modem connections but not exclusively) and then only to certain pcs at those locations)

Hi Kevin,

What protocol is this happening with?

Are you sure that KeepAlives is supported by the server? Perhaps server disconnect occurs in these cases?

Is there a proxy or a firewall which could interrupt connection somehow?

What happens if you try some other client, i.e. putty?

Regards,
Damba

We also use this component to connect to a HP-UX system using SSH2 and ever since windows 7 started to be deployed on the client computers a similar behaviour to the one described in the first post also started to be reported with some frequence, before this change in the operating system it might have also been happening but we have no reports to support this.

This behaviour has become more frequent with the migration of windows 7 Professional to the Enterprise edition.

The connection will randonly disconnect form the server in a time anywhere between 10 to 30 minutes of utilization. I cannot garantee that it only happens when the connection is idle but i have a suspicion that might be the case.

A connection to the same system using the SecureCRT client does not have the same behaviour, it remais connected regardless of being idle or not.

Please will you look into this situation, it has become so frequent that it has become a burden to the users and to the helpdesk team. We need to find a solution to this problem.

Thank you for your time,
Ivo Valente

Hi Ivo,

Did you try using KeepAlives property?

Also, what version of component are you using?

Regards,
Damba

Hi Ivo,

Did you try using KeepAlives property?

Also, what version of component are you using?

Regards,
Damba

Hello,

No, I cannot use the KeepAlives property with this application for a client can block a customer if he/she forgets to close the application overnight. This impacts reports that run at night.

So the client is disconnect after one hour of idleing, it has always been this way and it is how we need it to remain. It was like this before we started to have this disconnection problems.

We are using version 2.4.4.136 of the component, I don't think I can download the latest version anymore, but we can renew or rebuy the component if needed be.

Thank You,
Ivo Valente

Ivo,

The first thing we need to do is isolate the possible causes to this. If you set KeepAlives and that prevents the disconnection then this would solve the problem. You could always insert a timer into your application which would disconnect if session takes longer then an hour.

Also, another thing to try is disabling any firewalls that could be causing this and trying it out.

Another thing is setting Timeout property to 0 which would prevent component from disconnecting (server side disconnection could still occur).

Can you try the above things?

Regards,
Damba