185 lines
14 KiB
Bash
Executable File
185 lines
14 KiB
Bash
Executable File
#!/bin/bash
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### BEGIN INIT INFO
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# Provides: scriptname
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# Required-Start: $network
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# Required-Stop: $network
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Short-Description: iptables
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# Description: Enable firewall rules
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### END INIT INFO
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exec 1> >(logger -s -t $(basename $0)) 2>&1
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case $1 in
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start)
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echo -n "firewall start..."
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### IPv4
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iptables -P INPUT ACCEPT
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iptables -F INPUT
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## unencrypted traffic
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iptables -A INPUT -p esp -j ACCEPT -m comment --comment "ipsec"
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iptables -A INPUT -p udp --dport 500 --sport 500 -j ACCEPT -m comment --comment "ipsec"
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iptables -A INPUT -p udp --dport 4500 --sport 4500 -j ACCEPT -m comment --comment "ipsec"
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iptables -A INPUT -p icmp -j ACCEPT -m comment --comment "allow pings"
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## frr local service connections
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iptables -A INPUT -i lo -m multiport -p tcp --sports 2600:2618 -j ACCEPT -m comment --comment "local frr daemon vtys"
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iptables -A INPUT -i lo -m multiport -p tcp --dports 2600:2618 -j ACCEPT -m comment --comment "local frr daemon vtys"
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## local ceph osd services
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iptables -A INPUT -i lo -m multiport -p tcp --sports 6800:7300 -j ACCEPT -m comment --comment "local ceph osd traffic"
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iptables -A INPUT -i lo -m multiport -p tcp --dports 6800:7300 -j ACCEPT -m comment --comment "local ceph osd traffic"
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## traffic we want to see encrypted over the VPN
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iptables -A INPUT -m policy --pol ipsec --dir in -m multiport -p tcp --dports 6800:7300 -j ACCEPT -m comment --comment "ceph osd traffic"
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iptables -A INPUT -m policy --pol ipsec --dir in -m multiport -p tcp --sports 6800:7300 -j ACCEPT -m comment --comment "ceph osd traffic"
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iptables -A INPUT -m policy --pol ipsec --dir in -p tcp --dport 6789 -j ACCEPT -m comment --comment "ceph mon traffic"
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iptables -A INPUT -m policy --pol ipsec --dir in -p tcp --sport 6789 -j ACCEPT -m comment --comment "ceph mon traffic"
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iptables -A INPUT -m policy --pol ipsec --dir in -p udp --dport 4789 -j ACCEPT -m comment --comment "vxlan traffic"
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iptables -A INPUT -m policy --pol ipsec --dir in -p udp --sport 123 -j ACCEPT -m comment --comment "ntp replies for bastion"
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iptables -A INPUT -m policy --pol ipsec --dir in -p udp --sport 53 -j ACCEPT -m comment --comment "dns replies for bastion"
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iptables -A INPUT -m policy --pol ipsec --dir in -p tcp --dport 22 -j ACCEPT -m comment --comment "ssh if coming over the VPN"
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## external services we depend upon
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iptables -A INPUT -s 170.199.216.1 -p tcp --sport 2379 -j ACCEPT -m comment --comment "etcd replies stackapi"
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iptables -A INPUT -s 170.199.216.13 -p tcp --sport 25 -j ACCEPT -m comment --comment "allow email smart host"
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## rules for edge nodes, shouldn't ever end up matching on "normal nodes"
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iptables -A INPUT -i up+ -p gre -j ACCEPT -m comment --comment "gre tunnels from other sites"
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iptables -A INPUT -i up+ -m ttl --ttl-eq 1 -p tcp --dport 179 -j ACCEPT -m comment --comment "upstream to public bgp"
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iptables -A INPUT -i up+ -m ttl --ttl-eq 1 -p tcp --sport 179 -j ACCEPT -m comment --comment "upstream from public bgp"
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iptables -A INPUT -i customer+ -m ttl --ttl-eq 1 -p tcp --dport 179 -j ACCEPT -m comment --comment "downstream bgp for dedicated customer"
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iptables -A INPUT -i customer+ -m ttl --ttl-eq 1 -p tcp --sport 179 -j ACCEPT -m comment --comment "downstream bgp for dedicated customers"
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### mgmt
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iptables -A INPUT -i mgmt -p tcp --dport 22 -j ACCEPT -m comment --comment "ssh on mgmt vrf"
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iptables -A INPUT -i mgmt -m state --state ESTABLISHED,RELATED -j ACCEPT -m comment --comment "stateful mgmt vrf"
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### DROP the rest
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iptables -P INPUT DROP
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## this may only be needed on edge in some cases. needs to be tweaked once we have a network again spaning multiple regions
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#iptables -t mangle -A FORWARD -p tcp -m tcp -o usw1 --tcp-flags SYN,RST SYN -m tcpmss --mss 1437:10000 -j TCPMSS --set-mss 1436
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#special tables
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iptables -F FORWARD
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iptables -F OUTPUT
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iptables -t mangle -F
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iptables -t nat -F
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iptables -t raw -F
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# this matters on all boxes
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iptables -t raw -A PREROUTING -i mgmt1 -j ACCEPT -m comment --comment "DO track mgmt vrf"
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iptables -t raw -A OUTPUT -o mgmt -j ACCEPT -m comment --comment "DO track mgmt vrf"
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iptables -t raw -A PREROUTING -j NOTRACK -m comment --comment "do NOT track the rest"
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iptables -t raw -A OUTPUT -j NOTRACK -m comment --comment "do NOT track the rest"
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#### IPv6
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ip6tables -P INPUT ACCEPT
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ip6tables -F INPUT
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## unencrypted traffic
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ip6tables -A INPUT -p esp -j ACCEPT -m comment --comment "ipsec"
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ip6tables -A INPUT -p udp --dport 500 --sport 500 -j ACCEPT -m comment --comment "ipsec"
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ip6tables -A INPUT -p udp --dport 4500 --sport 4500 -j ACCEPT -m comment --comment "ipsec"
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ip6tables -A INPUT -p ipv6-icmp -j ACCEPT -m comment --comment "icmp"
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ip6tables -A INPUT -s fe80::/10 -i feth+ -m hl --hl-eq 1 -p tcp --sport 179 -j ACCEPT -m comment --comment "bgp (allow init as well as responding)"
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ip6tables -A INPUT -s fe80::/10 -i feth+ -m hl --hl-eq 1 -p tcp --dport 179 -j ACCEPT -m comment --comment "bgp (allow init as well as responding)"
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## external services we depend upon
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ip6tables -A INPUT -s 2604:bbc0:1:20::a001 -p tcp --sport 443 -j ACCEPT -m comment --comment "# mirrors.wit.com"
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## ceph
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ip6tables -A INPUT -i lo -m multiport -p tcp --dports 3300,6789 -j ACCEPT -m comment --comment "ceph mon traffic"
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ip6tables -A INPUT -i lo -m multiport -p tcp --sports 3300,6789 -j ACCEPT -m comment --comment "ceph mon traffic"
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ip6tables -A INPUT -m policy --pol ipsec --dir in -m multiport -p tcp --dports 3300,6789 -j ACCEPT -m comment --comment "ceph mon traffic"
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ip6tables -A INPUT -m policy --pol ipsec --dir in -m multiport -p tcp --sports 3300,6789 -j ACCEPT -m comment --comment "ceph mon traffic"
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ip6tables -A INPUT -i lo -m multiport -p tcp --dports 6800:7300 -j ACCEPT -m comment --comment "ceph osd traffic"
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ip6tables -A INPUT -i lo -m multiport -p tcp --sports 6800:7300 -j ACCEPT -m comment --comment "ceph osd traffic"
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ip6tables -A INPUT -m policy --pol ipsec --dir in -m multiport -p tcp --dports 6800:7300 -j ACCEPT -m comment --comment "ceph osd traffic"
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ip6tables -A INPUT -m policy --pol ipsec --dir in -m multiport -p tcp --sports 6800:7300 -j ACCEPT -m comment --comment "ceph osd traffic"
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## traffic we want to see encrypted over the VPN
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ip6tables -A INPUT -m policy --pol ipsec --dir in -p tcp --dport 22 -j ACCEPT -m comment --comment "ssh if coming over the VPN"
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ip6tables -A INPUT -m policy --pol ipsec --dir in -p udp --sport 53 -j ACCEPT -m comment --comment "dns replies from anything over the VPN"
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ip6tables -A INPUT -m policy --pol ipsec --dir in -p tcp --sport 80 -j ACCEPT -m comment --comment "http replies for bastion"
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ip6tables -A INPUT -m policy --pol ipsec --dir in -p udp --sport 123 -j ACCEPT -m comment --comment "ntp if coming over the VPN"
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ip6tables -A INPUT -m policy --pol ipsec --dir in -m multiport -p tcp --dports 49152:49215 -j ACCEPT -m comment --comment "libvirt live migration"
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ip6tables -A INPUT -m policy --pol ipsec --dir in -m multiport -p tcp --sports 49152:49215 -j ACCEPT -m comment --comment "libvirt live migration"
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## rules for edge nodes, these should be more specific but for now, it'll do
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ip6tables -A INPUT -s fe80::/10 -i gre+ -m hl --hl-eq 1 -p tcp --sport 179 -j ACCEPT -m comment --comment "bgp (allow init as well as responding)"
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ip6tables -A INPUT -s fe80::/10 -i gre+ -m hl --hl-eq 1 -p tcp --dport 179 -j ACCEPT -m comment --comment "bgp (allow init as well as responding)"
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ip6tables -A INPUT -s fe80::/10 -i ibgp+ -m hl --hl-eq 1 -p tcp --sport 179 -j ACCEPT -m comment --comment "bgp (allow init as well as responding)"
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ip6tables -A INPUT -s fe80::/10 -i ibgp+ -m hl --hl-eq 1 -p tcp --dport 179 -j ACCEPT -m comment --comment "bgp (allow init as well as responding)"
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ip6tables -A INPUT -i up+ -m hl --hl-eq 1 -p tcp --dport 179 -j ACCEPT -m comment --comment "bgp to public peer"
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ip6tables -A INPUT -i up+ -m hl --hl-eq 1 -p tcp --sport 179 -j ACCEPT -m comment --comment "bgp from public peer"
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ip6tables -A INPUT -i customer+ -m hl --hl-eq 1 -p tcp --dport 179 -j ACCEPT -m comment --comment "downstream bgp for dedicated customer"
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ip6tables -A INPUT -i customer+ -m hl --hl-eq 1 -p tcp --sport 179 -j ACCEPT -m comment --comment "downstream bgp for dedicated customers"
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### mgmt
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ip6tables -A INPUT -i mgmt1 -s fe80::/10 -p udp --dport 546 -j ACCEPT -m comment --comment "dhcp replys, unlcear why physical if not vrf"
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ip6tables -A INPUT -i mgmt -p tcp --dport 22 -j ACCEPT -m comment --comment "ssh for mgmt vrf"
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ip6tables -A INPUT -i mgmt -m state --state ESTABLISHED,RELATED -j ACCEPT -m comment --comment "stateful mgmt vrf"
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### DROP the rest
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ip6tables -P INPUT DROP
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#special tables
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ip6tables -F FORWARD
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ip6tables -F OUTPUT
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ip6tables -t mangle -F
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ip6tables -t nat -F
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ip6tables -t raw -F
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# manage conntrack
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ip6tables -t raw -A PREROUTING -i mgmt1 -j ACCEPT -m comment --comment "DO track mgmt vrf"
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ip6tables -t raw -A OUTPUT -o mgmt -j ACCEPT -m comment --comment "DO track mgmt vrf"
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ip6tables -t raw -A PREROUTING -j NOTRACK -m comment --comment "do NOT track default vrf"
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ip6tables -t raw -A OUTPUT -j NOTRACK -m comment --comment "do NOT track default vrf"
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#some boxes get special addon rules
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[ -e /etc/init.d/firewall-addon ] && source /etc/init.d/firewall-addon
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;;
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stop)
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echo -n "firewall stop..."
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#### Firewall rules
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iptables -P INPUT ACCEPT
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iptables -F
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iptables -t raw -F
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iptables -t nat -F
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iptables -t mangle -F
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ip6tables -P INPUT ACCEPT
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ip6tables -F
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ip6tables -t raw -F
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ip6tables -t nat -F
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ip6tables -t mangle -F
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echo " done"
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;;
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restart)
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#$0 stop
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$0 start
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;;
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*)
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echo "use $0 [start|stop|restart]"
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;;
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esac
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exit 0
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