Hello,
I setup prerouting rules with maps like
chain prerouting {
type nat hook prerouting priority 0; policy accept;
iif "ens3" ip6 saddr . tcp dport vmap @blacklist_tcp
if "ens3" ip6 saddr . udp dport vmap @blacklist_udp
dnat to tcp dport map @fwdtoip_tcp:tcp dport map @fwdtoport_tcp
dnat to udp dport map @fwdtoip_udp:udp dport map @fwdtoport_udp
ip6 daddr 2a01:729:16e:10::9998 redirect to :tcp dport map @redirect_tcp
ip6 daddr 2a01:729:16e:10::9998 redirect to :udp dport map @redirect_udp
ct status dnat accept
}
Default behavior in ip6 filter forward table is to drop. This means that
my above rules are blocked, I see (u18srv being the machine who will
forward the traffic to another one):
18:32:00.476524 IP6 <hostname>.41174 > u18srv.12345: Flags [S], seq
126955234, win 28640, options [mss 1432,sackOK,TS val 2255777795 ecr
0,nop,wscale 7], length 0
18:32:08.668468 IP6 <hostname>.41174 > u18srv.12345: Flags [S], seq
126955234, win 28640, options [mss 1432,sackOK,TS val 2255785986 ecr
0,nop,wscale 7], length 0
18:32:24.796392 IP6 <hostname>.41174 > u18srv.12345: Flags [S], seq
126955234, win 28640, options [mss 1432,sackOK,TS val 2255802114 ecr
0,nop,wscale 7], length 0
Now if I change my default value to accept for ip6 filter forward table,
all is good.
Question: how can I add forward rule to filter table using the existing
maps which are defined in nat tables ? Other solution ?
I thought that ct status dnat accept was the key to archieve my goal,
seems not :(
Thanks for any hint
--
Daniel
TOOTAi Networks
