May 6, 2011 · What causes the duplicate ACK records? More background if it helps: We're investigating network throughput concerns at one particular client site. The perceived issue from a user interface …

The TCP implementation ACKs every other data packet. So you should see, typically, two data packets received and then an ACK sent. The sender, of course, is not waiting for the ACK anyway. It will …

A linux server of mine is trying to establish a LDAPS connection to a global catalog server and the connection is getting dropped (presumably by the GC side). For the purpose of discussion, let's...

Dec 5, 2014 · I want to use a filter rule to capture only ack or syn packets. How do I do this?

Feb 16, 2011 · Basically, what is happening is that the client's machine is sending the SYN packet to establish the TCP connection and the web server receives it, but does not respond with the …

I'm getting excessive TCP Dup ACK and TCP Fast Retransmission on our network when I transfer files over the MetroEthernet link. The two sites are connected by one sonicwall router, so the sites are...

May 18, 2016 · From what I know about this particular application I believe the device on 10.0.0.1 is trying to initiate a connection to 172.16.0.1 but I am not seeing any SYN packets, only ACK.

I could imagine this happens when the SYN,ACK contains eg. incorrect sequence numbers (but this doesn't seem to apply in my case - the sequence numbers look fine). So I'm interested in an …

Mar 31, 2010 · The last_ack state (if I recall my TCP stack correctly) is the state when you have received your FIN message to close the connection from your neighbour, but you still need to flush …

May 21, 2009 · A basic TCP ACK says "I received all bytes up to X." Selective ACK allows you to say "I received bytes X-Y, and V-Z." So, for instance, if a host sent you 10,000 bytes and bytes 3000-5000 …