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1.1 misho 1: # 2: # /etc/sysctl.conf - Configuration file for setting system variables 3: # See /etc/sysctl.d/ for additional system variables 4: # See sysctl.conf (5) for information. 5: # 6: 7: #kernel.domainname = example.com 8: 9: # Uncomment the following to stop low-level messages on console 10: #kernel.printk = 3 4 1 3 11: 12: ##############################################################3 13: # Functions previously found in netbase 14: # 15: 16: # Uncomment the next two lines to enable Spoof protection (reverse-path filter) 17: # Turn on Source Address Verification in all interfaces to 18: # prevent some spoofing attacks 19: #net.ipv4.conf.default.rp_filter=1 20: #net.ipv4.conf.all.rp_filter=1 21: 22: # Uncomment the next line to enable TCP/IP SYN cookies 23: # See http://lwn.net/Articles/277146/ 24: # Note: This may impact IPv6 TCP sessions too 25: #net.ipv4.tcp_syncookies=1 26: 27: # Uncomment the next line to enable packet forwarding for IPv4 28: net.ipv4.ip_forward=1 29: 30: # Uncomment the next line to enable packet forwarding for IPv6 31: # Enabling this option disables Stateless Address Autoconfiguration 32: # based on Router Advertisements for this host 33: net.ipv6.conf.all.forwarding=1 34: 35: 36: ################################################################### 37: # Additional settings - these settings can improve the network 38: # security of the host and prevent against some network attacks 39: # including spoofing attacks and man in the middle attacks through 40: # redirection. Some network environments, however, require that these 41: # settings are disabled so review and enable them as needed. 42: # 43: # Do not accept ICMP redirects (prevent MITM attacks) 44: #net.ipv4.conf.all.accept_redirects = 0 45: #net.ipv6.conf.all.accept_redirects = 0 46: # _or_ 47: # Accept ICMP redirects only for gateways listed in our default 48: # gateway list (enabled by default) 49: # net.ipv4.conf.all.secure_redirects = 1 50: # 51: # Do not send ICMP redirects (we are not a router) 52: #net.ipv4.conf.all.send_redirects = 0 53: # 54: # Do not accept IP source route packets (we are not a router) 55: #net.ipv4.conf.all.accept_source_route = 0 56: #net.ipv6.conf.all.accept_source_route = 0 57: # 58: # Log Martian Packets 59: #net.ipv4.conf.all.log_martians = 1 60: 61: # Enable coredump for suid binaries 62: fs.suid_dumpable = 1