Hello there. I had the following file in my system:
/etc/sysctl.d/90-custom-mtu-probing.conf net.ipv4.tcp_mtu_probing=1 I deleted that file and rebooted my system. But the "net.ipv4.tcp_mtu_probing" value is still "1", even though its default is "0". I have tried to use "sudo sysctl -w net.ipv4.tcp_mtu_probing=0" and "echo 0 > /proc/sys/net/ipv4/tcp_mtu_probing" (as sudo), but it still gets reverted to "1" after reboot. My intention is to go back to its default, which is "0", without having to create a custom override for it (which should be happening). I have ran "sudo sysctl --system" and it does not appear there. I have checked all system-wide locations for sysctl.d/sysctl.conf files/directories and also nothing there. The kernel itself is not very clear about the default value of this parameter (I couldn't find it, at least). Help is appreciated. Thanks.
