:INPUT,FORWARD,OUTPUT
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-p icmp -m icmp --icmp-type any;=;OK
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# output uses the number, better use the name?
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# ERROR: cannot find: iptables -I INPUT -p icmp -m icmp --icmp-type echo-reply
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# -p icmp -m icmp --icmp-type echo-reply;=;OK
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# output uses the number, better use the name?
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# ERROR: annot find: iptables -I INPUT -p icmp -m icmp --icmp-type destination-unreachable
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# -p icmp -m icmp --icmp-type destination-unreachable;=;OK
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# it does not acccept name/name, should we accept this?
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# ERROR: cannot load: iptables -A INPUT -p icmp -m icmp --icmp-type destination-unreachable/network-unreachable
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# -p icmp -m icmp --icmp-type destination-unreachable/network-unreachable;=;OK
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-m icmp;;FAIL
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# we accept "iptables -I INPUT -p tcp -m tcp", why not this below?
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# ERROR: cannot load: iptables -A INPUT -p icmp -m icmp
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# -p icmp -m icmp;=;OK
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