On Thu, Dec 26, 2019 at 03:41:32PM +0100, Marco d'Itri wrote: > OK. One more thing: can I make the names lower case like in the other > numbers files or are they case sensitiv? >
AFAIK they're not case sensitive, i.e. these two commands (one lowercase and the other uppercase) work as expected: # ebtables -A FORWARD -p arp -j ACCEPT # ebtables -A FORWARD -p IPv6 -j ACCEPT Listing the rules applied, there's no difference between the lowercase and the uppercase rule (both are listed in uppercase): # ebtables -L FORWARD Bridge table: filter Bridge chain: FORWARD, entries: 2, policy: ACCEPT -p ARP -j ACCEPT -p IPv6 -j ACCEPT But, those protocol names are obtained from ethertypes, if they're "lowercased" in /etc/ethertypes the output differs (now the rules are listed in lowercase): ... -p arp -j ACCEPT -p ipv6 -j ACCEPT So any tool reading from ebtables output can be broken. I think it's better not to put the names in lowercase. Thanks, Alberto
