Update sysctl.conf

etc/sysctl.conf

@@ -1,35 +1,48 @@
-# Kernel sysctl configuration file
-#
+# Kernel sysctl configuration file 
 # Sources : 
-# http://klaver.it/linux/ 
 # https://easyengine.io/tutorials/linux/sysctl-conf/
-# 
-# Customized by VirtuBox (https://virtubox.net) 
+# http://klaver.it/linux/ 
+#
 #
-# To apply the new configuration, use : 
 # sysctl -e -p /etc/sysctl.conf
 #
-# 
+# For binary values, 0 is disabled, 1 is enabled.  See sysctl(8) and sysctl.conf(5) for more details.
 #
 # 
 ###
 ### GENERAL SYSTEM SECURITY OPTIONS ###
 ###
 
+# Controls the System Request debugging functionality of the kernel
+kernel.sysrq = 0
+
 #Allow for more PIDs
 kernel.pid_max = 65535
 
+# Controls the maximum size of a message, in bytes
+kernel.msgmnb = 65535
+
+# Controls the default maxmimum size of a mesage queue
+kernel.msgmax = 65535
+
+# Restrict core dumps
+fs.suid_dumpable = 0
+
+# Hide exposed kernel pointers
+kernel.kptr_restrict = 1
+
 ### IMPROVE SYSTEM MEMORY MANAGEMENT ###
 
 # Increase size of file handles and inode cache
 fs.file-max = 2097152
 
+# Increase size of file handles and inode cache
+fs.file-max = 209708
 # Do less swapping
 vm.swappiness = 10
-vm.dirty_ratio = 60
+vm.dirty_ratio = 30
 vm.dirty_background_ratio = 2
 
-# Required for Redis
 vm.overcommit_memory = 1
 
 #Prevent SYN attack, enable SYNcookies (they will kick-in when the max_syn_backlog reached)
@@ -106,8 +119,6 @@ net.ipv6.conf.all.autoconf=0
 net.ipv6.conf.all.accept_ra=0
 net.ipv6.conf.default.autoconf=0
 net.ipv6.conf.default.accept_ra=0
-net.ipv6.conf.eth0.autoconf=0
-net.ipv6.conf.eth0.accept_ra=0
 
 
 ###