-kernel.panic=3
-kernel.core_pattern=/tmp/%e.%t.%p.%s.core
-fs.suid_dumpable=2
-
-net.ipv4.conf.default.arp_ignore=1
-net.ipv4.conf.all.arp_ignore=1
-net.ipv4.ip_forward=1
-net.ipv4.icmp_echo_ignore_broadcasts=1
-net.ipv4.icmp_ignore_bogus_error_responses=1
-net.ipv4.igmp_max_memberships=100
-net.ipv4.tcp_fin_timeout=30
-net.ipv4.tcp_keepalive_time=120
-net.ipv4.tcp_syncookies=1
-net.ipv4.tcp_timestamps=1
-net.ipv4.tcp_sack=1
-net.ipv4.tcp_dsack=1
-
-net.ipv6.conf.default.forwarding=1
-net.ipv6.conf.all.forwarding=1
-
-net.netfilter.nf_conntrack_acct=1
-net.netfilter.nf_conntrack_checksum=0
-net.netfilter.nf_conntrack_max=16384
-net.netfilter.nf_conntrack_tcp_timeout_established=7440
-net.netfilter.nf_conntrack_udp_timeout=60
-net.netfilter.nf_conntrack_udp_timeout_stream=180
-
-# disable bridge firewalling by default
-net.bridge.bridge-nf-call-arptables=0
-net.bridge.bridge-nf-call-ip6tables=0
-net.bridge.bridge-nf-call-iptables=0
+# Defaults are configured in /etc/sysctl.d/* and can be customized in this file
--- /dev/null
+# Do not edit, changes to this file will be lost on upgrades
+# /etc/sysctl.conf can be used to customize sysctl settings
+
+kernel.panic=3
+kernel.core_pattern=/tmp/%e.%t.%p.%s.core
+fs.suid_dumpable=2
+
+net.ipv4.conf.default.arp_ignore=1
+net.ipv4.conf.all.arp_ignore=1
+net.ipv4.ip_forward=1
+net.ipv4.icmp_echo_ignore_broadcasts=1
+net.ipv4.icmp_ignore_bogus_error_responses=1
+net.ipv4.igmp_max_memberships=100
+net.ipv4.tcp_fin_timeout=30
+net.ipv4.tcp_keepalive_time=120
+net.ipv4.tcp_syncookies=1
+net.ipv4.tcp_timestamps=1
+net.ipv4.tcp_sack=1
+net.ipv4.tcp_dsack=1
+
+net.ipv6.conf.default.forwarding=1
+net.ipv6.conf.all.forwarding=1
+
+net.netfilter.nf_conntrack_acct=1
+net.netfilter.nf_conntrack_checksum=0
+net.netfilter.nf_conntrack_max=16384
+net.netfilter.nf_conntrack_tcp_timeout_established=7440
+net.netfilter.nf_conntrack_udp_timeout=60
+net.netfilter.nf_conntrack_udp_timeout_stream=180
+
+# disable bridge firewalling by default
+net.bridge.bridge-nf-call-arptables=0
+net.bridge.bridge-nf-call-ip6tables=0
+net.bridge.bridge-nf-call-iptables=0