As for ephemeral ports: The Internet Assigned Numbers Authority (IANA) suggests the range 49152 to 65535 (2 15 +2 14 to 2 16 −1) for dynamic or private ports. Many Linux kernels use the port range 32768 to 61000 Looking at the destination on the TCP/IP tuple as in the example you ask: udp 0 0 192.168.1.25:41136 61.216.153.106:123 You can see it is the current machine using an NTP service UDP ...
Staged stories on community and identity, ephemeral architecture showed that in 2022 it doesn't have to be permanent to be powerful. A direct and popped-up public installation can shift from ...
I suddenly came across the term "ephemeral port" in a Linux article that I was reading, but the author did not mention what it is. What is an ephemeral port in UNIX?
networking - Ephemeral port : What is it and what does it do? - Unix ...
Is there no pre-existing solution for ephemeral users on linux? The second issue might not be as easy to fix, but it would be nice if the test user (or ephemeral user) could actually be restricted from writing to any directory outside of the PREFIX directory created for them. As it stands, they can of course write to anything that gets chmod 777ed.
After digging a bit I found that it happens when we or the server (same behavior in both cases) closes the connection with an RST packet and we then reuse the same ephemeral source port shortly after (usually tens of seconds).
How to know the ephemeral port for a service? - Unix & Linux Stack Exchange