X-Git-Url: http://git.ipfire.org/?p=ipfire-2.x.git;a=blobdiff_plain;f=config%2Fetc%2Fsysctl.conf;h=dd087d2d97a77ed52af9b557a73a2935dc1c2908;hp=f88ec5f7a3824f36235f575527f500866623af43;hb=af2cc3be64d82d35978590b316a46b5b206afa0d;hpb=832eec2359d04a3f51d78cda8577d713a6ff4bc9

diff --git a/config/etc/sysctl.conf b/config/etc/sysctl.conf
index f88ec5f7a3..dd087d2d97 100644
--- a/config/etc/sysctl.conf
+++ b/config/etc/sysctl.conf
@@ -1,25 +1,53 @@
 net.ipv4.ip_forward = 1
 net.ipv4.ip_dynaddr = 1
+
+# Disable Path MTU Discovery
+net.ipv4.ip_no_pmtu_disc = 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_sack = 0
-net.ipv4.tcp_timestamps = 0
 net.ipv4.tcp_syncookies = 1
 net.ipv4.tcp_fin_timeout = 30
-net.ipv4.tcp_window_scaling = 0
 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
 
+# Enable connection tracking for IPVS
+net.ipv4.vs.conntrack = 1
+
 kernel.printk = 1 4 1 7
-vm.swappiness=0
+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