| # |
| # Configuration file for setting network variables. Please note these settings |
| # override /etc/sysctl.conf. If you prefer to use /etc/sysctl.conf, please |
| # adjust IPT_SYSCTL in /etc/default/ufw. |
| # |
| |
| # Uncomment this to allow this host to route packets between interfaces |
| #net/ipv4/ip_forward=1 |
| #net/ipv6/conf/default/forwarding=1 |
| #net/ipv6/conf/all/forwarding=1 |
| |
| # 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 |
| |
| # Do not accept IP source route packets (we are not a router) |
| net/ipv4/conf/default/accept_source_route=0 |
| net/ipv4/conf/all/accept_source_route=0 |
| net/ipv6/conf/default/accept_source_route=0 |
| net/ipv6/conf/all/accept_source_route=0 |
| |
| # Disable ICMP redirects. ICMP redirects are rarely used but can be used in |
| # MITM (man-in-the-middle) attacks. Disabling ICMP may disrupt legitimate |
| # traffic to those sites. |
| net/ipv4/conf/default/accept_redirects=0 |
| net/ipv4/conf/all/accept_redirects=0 |
| net/ipv6/conf/default/accept_redirects=0 |
| net/ipv6/conf/all/accept_redirects=0 |
| |
| # Ignore bogus ICMP errors |
| net/ipv4/icmp_echo_ignore_broadcasts=1 |
| net/ipv4/icmp_ignore_bogus_error_responses=1 |
| net/ipv4/icmp_echo_ignore_all=0 |
| |
| # Don't log Martian Packets (impossible packets) |
| net/ipv4/conf/default/log_martians=0 |
| net/ipv4/conf/all/log_martians=0 |
| |
| # Change to '1' to enable TCP/IP SYN cookies This disables TCP Window Scaling |
| # (http://lkml.org/lkml/2008/2/5/167) |
| net/ipv4/tcp_syncookies=0 |
| |
| #net/ipv4/tcp_fin_timeout=30 |
| #net/ipv4/tcp_keepalive_intvl=1800 |
| |
| # normally allowing tcp_sack is ok, but if going through OpenBSD 3.8 RELEASE or |
| # earlier pf firewall, should set this to 0 |
| net/ipv4/tcp_sack=1 |
| |
| # Uncomment this to turn off ipv6 autoconfiguration |
| #net/ipv6/conf/default/autoconf=0 |
| #net/ipv6/conf/all/autoconf=0 |
| |
| # Uncomment this to enable ipv6 privacy addressing |
| #net/ipv6/conf/default/use_tempaddr=2 |
| #net/ipv6/conf/all/use_tempaddr=2 |