ls: /proc/sys/net/ipv4/ip_conntrack_max: No such file or directory

[root@Node ~]# ll /proc/sys/net/ipv4/ip_conntrack_max
ls: /proc/sys/net/ipv4/ip_conntrack_max: No such file or directory


Maybe the module has not loaded.
Check whether the module loaded 

[root@Node ~]# lsmod | grep  ip_conntrack


If not loaded, then load the module as below.

[root@Node ~]# modprobe ip_conntrack

[root@Node ~]# ll /proc/sys/net/ipv4/ip_conntrack_max
-rw-r--r-- 1 root root 0 Apr 22 22:29 /proc/sys/net/ipv4/ip_conntrack_max