| # This configuration file is taken from Debian. |
| # |
| # /etc/sysctl.conf - Configuration file for setting system variables |
| # See sysctl.conf (5) for information. |
| # |
| |
| #kernel.domainname = example.com |
| |
| # Uncomment the following to stop low-level messages on console |
| #kernel.printk = 4 4 1 7 |
| |
| ##############################################################3 |
| # Functions previously found in netbase |
| # |
| |
| # Uncomment the next two lines to enable Spoof protection (reverse-path filter) |
| # Turn on Source Address Verification in all interfaces to |
| # prevent some spoofing attacks |
| net.ipv4.conf.default.rp_filter=1 |
| net.ipv4.conf.all.rp_filter=1 |
| |
| # Uncomment the next line to enable TCP/IP SYN cookies |
| #net.ipv4.tcp_syncookies=1 |
| |
| # Uncomment the next line to enable packet forwarding for IPv4 |
| #net.ipv4.ip_forward=1 |
| |
| # Uncomment the next line to enable packet forwarding for IPv6 |
| #net.ipv6.conf.all.forwarding=1 |
| |
| |
| ################################################################### |
| # Additional settings - these settings can improve the network |
| # security of the host and prevent against some network attacks |
| # including spoofing attacks and man in the middle attacks through |
| # redirection. Some network environments, however, require that these |
| # settings are disabled so review and enable them as needed. |
| # |
| # Ignore ICMP broadcasts |
| #net.ipv4.icmp_echo_ignore_broadcasts = 1 |
| # |
| # Ignore bogus ICMP errors |
| #net.ipv4.icmp_ignore_bogus_error_responses = 1 |
| # |
| # Do not accept ICMP redirects (prevent MITM attacks) |
| #net.ipv4.conf.all.accept_redirects = 0 |
| #net.ipv6.conf.all.accept_redirects = 0 |
| # _or_ |
| # Accept ICMP redirects only for gateways listed in our default |
| # gateway list (enabled by default) |
| # net.ipv4.conf.all.secure_redirects = 1 |
| # |
| # Do not send ICMP redirects (we are not a router) |
| #net.ipv4.conf.all.send_redirects = 0 |
| # |
| # Do not accept IP source route packets (we are not a router) |
| #net.ipv4.conf.all.accept_source_route = 0 |
| #net.ipv6.conf.all.accept_source_route = 0 |
| # |
| # Log Martian Packets |
| #net.ipv4.conf.all.log_martians = 1 |
| # |
| |
| #kernel.shmmax = 141762560 |