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+# /etc/sysctl.conf - Configuration file for setting system variables
+# See sysctl.conf (5) for information.
+
+# you can have the CD-ROM close when you use it, and open
+# when you are done.
+#dev.cdrom.autoeject = 1
+#dev.cdrom.autoclose = 1
+
+# protection from the SYN flood attack
+net/ipv4/tcp_syncookies=1
+
+# see the evil packets in your log files
+net/ipv4/conf/all/log_martians=1
+
+# makes you vulnerable or not :-)
+net/ipv4/conf/all/accept_redirects=0
+net/ipv4/conf/all/accept_source_route=0
+net/ipv4/icmp_echo_ignore_broadcasts =1
+
+# needed for routing, including masquerading or NAT
+#net/ipv4/ip_forward=1
+
+# sets the port range used for outgoing connections
+#net.ipv4.ip_local_port_range = 32768 61000
+
+# Broken routers and obsolete firewalls will corrupt the window scaling
+# and ECN. Set these values to 0 to disable window scaling and ECN.
+# This may, rarely, cause some performance loss when running high-speed
+# TCP/IP over huge distances or running TCP/IP over connections with high
+# packet loss and modern routers. This sure beats dropped connections.
+#net.ipv4.tcp_ecn = 0
+
+# Swapping too much or not enough? Disks spinning up when you'd
+# rather they didn't? Tweak these.
+#vm.vfs_cache_pressure = 100
+#vm.laptop_mode = 0
+#vm.swappiness = 60
+
+#kernel.printk_ratelimit_burst = 10
+#kernel.printk_ratelimit = 5
+#kernel.panic_on_oops = 0
+
+# Reboot 600 seconds after a panic
+#kernel.panic = 600
+
+# enable SysRq key (note: console security issues)
+#kernel.sysrq = 1
+
+# Change name of core file to start with the command name
+# so you get things like: emacs.core mozilla-bin.core X.core
+#kernel.core_pattern = %e.core
+
+# NIS/YP domain (not always equal to DNS domain)
+#kernel.domainname = example.com
+#kernel.hostname = darkstar
+
+# This limits PID values to 4 digits, which allows tools like ps
+# to save screen space.
+kernel/pid_max=10000
+
+# Protects against creating or following links under certain conditions
+# See https://www.kernel.org/doc/Documentation/sysctl/fs.txt
+#fs.protected_hardlinks = 1
+#fs.protected_symlinks = 1