I run a particular program on linux which sometimes crashes. If you open it quickly after that, it listens on socket 49201 instead of 49200 as it did the first time. netstat reveals that 49200 is in a TIME_WAIT state.
Is there a program you can run to immediately force that socket move out of the TIME_WAIT state?
How can I passively monitor the packet loss on TCP connections to/from my machine?
Basically, I'd like a tool that sits in the background and watches TCP ack/nak/re-transmits to generate a report on which peer IP addresses "seem" to be experiencing heavy loss.
Most questions like this that I find of SF suggest using tools like iperf. But, I need to monitor connections to/from a real application on my machine.
Is this data just sitting there in the Linux TCP stack?
In Amazon EC2, where I set "security groups", It says: Source:
0.0.0.0/0 And then it gives an example of: 192.168.2.0/24
What is "/24"?
I know what port and IP is.
I want to use a filter rule to capture only ack or syn packets. How do I do this?
It's from this answer:
https://stackoverflow.com/questions/2482411/is-this-pdo-bug-fixed-now/2482424#2482424
When the host is "localhost", MySQL Unix clients use a Unix socket, AKA Unix Domain Socket, rather than a TCP/IP socket for the connection, thus the TCP port doesn't matter.