Is the IP being delivered to this server by DHCP ?

Typically how long does it take to close the connections from LAST_ACK state?

Cheers,
rsivanandan

The ip is not with DHCP.

And i don`t known how many time to close i don`t see the connection closed, the number of LAST_ACK is incremental only.

???

Are you using IIS?

have you tried my recommendation?

I issue seems to be, he server is not closing sessions in an orderly time

What kind of server is this? You need to provide more information on what is it serving?

The issue what you're seeing is a TCP stack problem at the root, but it has to be known on the application as well. LAST_ACK means, after the connection is closed, the last acknowledge has not been reached the server and is the reason why you see it that way. A lot of things could cause that (for instance, if you're using load balancer, some times this might happen since the load balancer closes the connection quickly).

Cheers,
rsivanandan

jfer0x01:
Yes i tried that, because the sessions i see never died, the number is only incremental. The session timeout is 20 minutes.


rsivanandan:
I upload the images with the server info, this server have teaming with one IP, and run  one application with IIS to run CGI and Authentication and back have tomcat with application. I talk with provider but he said the problem is with the users no have logoff and close the explorer, but i see the number os sessions never decrase.

Now have 215 LAST_ACK.
Network.JPG
SystemProperties.JPG

I don't buy your service providers explanation. Have you tried this locally?

I mean, connect to it from within your local LAN, watch the TCP connection on the server.

Then close the explorer and see how long it takes to close it out.

There isn't going to be a ready made and cooked solution for this, if we want to resolve this then we need to first find what is going on here.

Cheers,
rsivanandan

rsivanandan:

I make a capture with WireShark but i don't see nothing out of normal. Today the problem ocurr 2 peoples in the same moment. In different vlans and different floors.

jfer0x01:

I think your recommendation is only for asp. But this case is for a CGI.

Thanks

I validate the solutions with Sector Of networking. but we had no response yet

ASP?

The solution if for IIS web server, not a ASP setup.

As rsivanandan mentioned, your issue is linked to sockets not closing in an orderly manner

Jfer

rsivanandan:

We test the solution with parameter in Registry but we have't good result. The problem still persist


jfer0x01:

What happend with the others users using application?.

Can you elaborate on the results you got?

Cheers,
rsivanandan

In IIS?

Their sessions will close in more orderly time.

Thats all

Jfer

But i only need close the sessions with legend "LAST_ACK"

I discovered that this is a consequence of the problem, but in reality would be:

I have an application that has a CGI called him up IIS pdmweb.exe it connects with another process called webengine.exe and this is connected to the main process domsrvr.exe. Currently it is losing the connection between the CGI and webengine.exe, we try to throw a sniffer but not pass through a plate we see no network traffic. There any way to internally monitor the communication between 2 processes?.

I found with provider differents versions of software and we follow case to solve this problema, i put the solutions when we test.

Excellent,

please keep us informed

Jfer

Now we have plain to migrate next version of software. I add the coments when finish this.

This week we work to upgrade the version, but we have problemas and we rollback the upgrade.

Any further advancements?

Seems the code does not closed the session handlers after use.

Jfer

Yeah, we detect the problem is because we have different versions of software QA and Production. The provider recommend make a fresh install this software, this friday we start this machines.