| # |
| # rules.before |
| # |
| # Rules that should be run before the ufw command line added rules. Custom |
| # rules should be added to one of these chains: |
| # ufw6-before-input |
| # ufw6-before-output |
| # ufw6-before-forward |
| # |
| |
| # Don't delete these required lines, otherwise there will be errors |
| *filter |
| :ufw6-before-input - [0:0] |
| :ufw6-before-output - [0:0] |
| :ufw6-before-forward - [0:0] |
| # End required lines |
| |
| |
| # allow all on loopback |
| -A ufw6-before-input -i lo -j ACCEPT |
| -A ufw6-before-output -o lo -j ACCEPT |
| |
| # drop packets with RH0 headers |
| -A ufw6-before-input -m rt --rt-type 0 -j DROP |
| -A ufw6-before-forward -m rt --rt-type 0 -j DROP |
| -A ufw6-before-output -m rt --rt-type 0 -j DROP |
| |
| # for stateless autoconfiguration (restrict NDP messages to hop limit of 255) |
| -A ufw6-before-input -p icmpv6 --icmpv6-type neighbor-solicitation -m hl --hl-eq 255 -j ACCEPT |
| -A ufw6-before-output -p icmpv6 --icmpv6-type neighbor-solicitation -m hl --hl-eq 255 -j ACCEPT |
| -A ufw6-before-input -p icmpv6 --icmpv6-type neighbor-advertisement -m hl --hl-eq 255 -j ACCEPT |
| -A ufw6-before-output -p icmpv6 --icmpv6-type neighbor-advertisement -m hl --hl-eq 255 -j ACCEPT |
| -A ufw6-before-input -p icmpv6 --icmpv6-type router-solicitation -m hl --hl-eq 255 -j ACCEPT |
| -A ufw6-before-input -p icmpv6 --icmpv6-type router-advertisement -m hl --hl-eq 255 -j ACCEPT |
| |
| # quickly process packets for which we already have a connection |
| -A ufw6-before-input -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT |
| -A ufw6-before-output -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT |
| -A ufw6-before-forward -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT |
| |
| # for multicast ping replies from link-local addresses (these don't have an |
| # associated connection and would otherwise be marked INVALID) |
| -A ufw6-before-input -p icmpv6 --icmpv6-type echo-reply -s fe80::/10 -j ACCEPT |
| |
| # drop INVALID packets (logs these in loglevel medium and higher) |
| -A ufw6-before-input -m conntrack --ctstate INVALID -j ufw6-logging-deny |
| -A ufw6-before-input -m conntrack --ctstate INVALID -j DROP |
| |
| # ok icmp codes for INPUT |
| -A ufw6-before-input -p icmpv6 --icmpv6-type destination-unreachable -j ACCEPT |
| -A ufw6-before-input -p icmpv6 --icmpv6-type packet-too-big -j ACCEPT |
| -A ufw6-before-input -p icmpv6 --icmpv6-type time-exceeded -j ACCEPT |
| -A ufw6-before-input -p icmpv6 --icmpv6-type parameter-problem -j ACCEPT |
| -A ufw6-before-input -p icmpv6 --icmpv6-type echo-request -j ACCEPT |
| |
| # ok icmp code for FORWARD |
| -A ufw6-before-forward -p icmpv6 --icmpv6-type destination-unreachable -j ACCEPT |
| -A ufw6-before-forward -p icmpv6 --icmpv6-type packet-too-big -j ACCEPT |
| -A ufw6-before-forward -p icmpv6 --icmpv6-type time-exceeded -j ACCEPT |
| -A ufw6-before-forward -p icmpv6 --icmpv6-type parameter-problem -j ACCEPT |
| -A ufw6-before-forward -p icmpv6 --icmpv6-type echo-request -j ACCEPT |
| |
| # allow dhcp client to work |
| -A ufw6-before-input -p udp -s fe80::/10 --sport 547 -d fe80::/10 --dport 546 -j ACCEPT |
| |
| # allow MULTICAST mDNS for service discovery |
| -A ufw6-before-input -p udp -d ff02::fb --dport 5353 -j ACCEPT |
| |
| # allow MULTICAST UPnP for service discovery |
| -A ufw6-before-input -p udp -d ff02::f --dport 1900 -j ACCEPT |
| |
| # don't delete the 'COMMIT' line or these rules won't be processed |
| COMMIT |