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*filter
:INPUT DROP [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -i tinc_dn42 -j ACCEPT
-A INPUT -p icmp --icmp-type destination-unreachable -j ACCEPT
-A INPUT -p icmp --icmp-type time-exceeded -j ACCEPT
-A INPUT -p icmp --icmp-type parameter-problem -j ACCEPT
-A INPUT -p icmp --icmp-type echo-request -j ACCEPT
# traceroute
-A INPUT -p udp -m multiport --dports 33434:33534 -j REJECT --reject-with icmp-port-unreachable
# DNS
-A INPUT -p udp --dport 53 -j ACCEPT
-A INPUT -p tcp --dport 53 -j ACCEPT
COMMIT
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