Is 0/0 valid in a table? No error is generated, but traffic isn't passed as expected.
eg.
table <some> const { 0/0, !X.X.X.X/32, !X.X.X.X/32 }
pass in log quick on $ext_if inet proto tcp from <some> to any port www flags S/FSRA
synproxy state
While this is passed as expected.
table <some> const { 0/1, 128/1, !X.X.X.X/32, !X.X.X.X/32 }
pass in log quick on $ext_if inet proto tcp from <some> to any port www flags S/FSRA
synproxy state
