So I did an OS version-up in a linux server, and was seeing if any setting has been changed.And when I typed "sysctl -a | grep "net.ipv4.ip_forward"The following line was added,
net.ipv4.ip_forward_use_pmtu = 0
I know that this is because this parameter is in /proc/sys.But I think if the result of sysctl before upload did not show this line, it was not in /proc/sys before as well, right ?I know that 0 means " this setting is not applied...So basically it does not do anything.But why this line is added.
The question is
Is there any possible reason that can add this line?
Thank you, ahead.