Revert "Disable Path MTU discovery"

[ipfire-2.x.git] / config / etc / sysctl.conf

net.ipv4.ip_forward = 1
net.ipv4.ip_dynaddr = 1

net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.icmp_ignore_bogus_error_responses = 1
net.ipv4.icmp_ratelimit = 1000
net.ipv4.icmp_ratemask = 6168

net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_syn_retries = 3
net.ipv4.tcp_synack_retries = 3

net.ipv4.conf.default.arp_filter = 1
net.ipv4.conf.default.rp_filter = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.conf.default.log_martians = 1

net.ipv4.conf.all.arp_filter = 1
net.ipv4.conf.all.rp_filter = 0
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.all.log_martians = 1

kernel.printk = 1 4 1 7
vm.swappiness=1
vm.mmap_min_addr = 4096
vm.min_free_kbytes = 8192

# Disable IPv6 by default.
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1

# Enable netfilter accounting
net.netfilter.nf_conntrack_acct=1

# Disable netfilter on bridges.
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 0

# Try to keep kernel address exposures out of various /proc files (kallsyms, modules, etc).
kernel.kptr_restrict = 2

# Avoid kernel memory address exposures via dmesg.
kernel.dmesg_restrict = 1