Hi, I'm reading the iptables tutorial 1.2.2 by Oskar Andreasson at
https://www.frozentux.net/iptables-tutorial/iptables-tutorial.html where I
read:
Match -p, --protocol
Example iptables -A INPUT -p tcp
Explanation ... This match can also be inversed with the !
sign, so --protocol ! tcp would mean to match UDP and ICMP.
So I tried it on openSUSE 13.2 and iptables replied:
pinta:~ # iptables -A INPUT --protocol ! icmp
iptables v1.4.21: unknown protocol "!" specified
Try `iptables -h' or 'iptables --help' for more information.
Escaping the ! as \! makes no difference. I am doing something wrong.
Any suggestion as to what it is would be very welcome.
Roger
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