1
vote
2answers
157 views

Capture SMTP traffic over long time period

We have an SMTP relay (just an XP box with SMTP) on our network. It's hanging around because some legacy apps used to use it so send emails from code. It hardly gets any traffic, I can see from the ...
1
vote
3answers
11k views

Troubleshoot large number of TCP retransmits / dup ack / segment lost

I have a problem with RDC slowing to a crawl or disconnecting entirely. Client is XP SP3 w/ RDC 6, server is Win 2k8 R2. Both have been scanned thoroughly and found to be virus free. I downloaded ...
7
votes
2answers
6k views

Stopping the WinPcap Packet capture service

I just installed WireShark, which also installed WinPcap. During the installation it said "do you want xxx to start automatically", which I answered yes. Now I would like to stop the service when I ...
9
votes
4answers
52k views

What causes duplicate ACK records?

We're reviewing Wireshark captures from a few client machines that are showing multiple duplicate ACK records which then triggers retransmit and out-of-sequence packets. These are shown in the ...