Check if port is open or closed on a Linux server?
Sep 7, 2011 · 275 You can check if a process listens on a TCP or UDP port with ss -tuplen (replacement of netstat). To check whether some ports are accessible from the outside (this is …
linux - Netstat continuous refresh (watch changes the output)
Netstat continuous refresh (watch changes the output) Ask Question Asked 13 years, 6 months ago Modified 4 years, 4 months ago
linux - How do I get the number of (currently) established TCP ...
ss or netstat only show network connections based on network sockets. that is about connections related with the user processes. If we have some traversal traffic - it is not visible via ss or …
How passively monitor for tcp packet loss? (Linux) - Server Fault
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 …
linux - How to find out the reason (s) why the network interface is ...
Is there a way on Linux to get statistics about the various reasons packets were dropped? On all network interfaces (openSUSE 12.3) on several servers, ifconfig and netstat -i are reporting …
How do I clear the interface stats on Linux - Server Fault
Jun 10, 2009 · So one of my clients configured one of their switches and the resulting configuration resulted in a duplex mismatch between the switch and a Linux host. We have …
How to forcibly close a socket in TIME_WAIT? - Server Fault
Sep 3, 2008 · 133 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 …
linux - netstat -ntap doesn't show pid/process name for some ...
The problem is that we have a lot of ESTABLISHED connections that don't show PID nor Program name in netstat -ntap output. Netstat was called from root, there are no chroots, grsecurity, nor …
linux - Huge amount of TIME_WAIT connections says netstat
Huge amount of TIME_WAIT connections says netstat Ask Question Asked 16 years, 6 months ago Modified 3 years, 1 month ago
linux - Network port open, but no process attached? - Server Fault
I have a weird situation going on with an open network port. My main question is, why would there not be a program associated with an open TCP port: netstat -ln --program Active Internet …