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| author | Christian Poessinger <christian@poessinger.com> | 2020-05-11 18:58:05 +0200 |
|---|---|---|
| committer | Christian Poessinger <christian@poessinger.com> | 2020-05-16 15:30:26 +0200 |
| commit | 1c6ae6f7e7cf30d9598d2886bb3d2c34685a2c8c (patch) | |
| tree | caa41f12fb793bb6fa0b7e6a8c45e2318484d911 /data/templates/firewall/nftables-nat.tmpl | |
| parent | a927192af24079e6d392e5cae0340441490c0091 (diff) | |
| download | vyos-1x-1c6ae6f7e7cf30d9598d2886bb3d2c34685a2c8c.tar.gz vyos-1x-1c6ae6f7e7cf30d9598d2886bb3d2c34685a2c8c.zip | |
nat: T2198: automatically determine handler numbers
When instantiating NAT it is required to isntall some nftable jump targets.
The targets need to be added after a specific other target thus we need to
dynamically query the handler number. This is done by get_handler() which could
be moved to vyos.util at a later point in time so it can be reused for a
firewall rewrite.
Diffstat (limited to 'data/templates/firewall/nftables-nat.tmpl')
| -rw-r--r-- | data/templates/firewall/nftables-nat.tmpl | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/data/templates/firewall/nftables-nat.tmpl b/data/templates/firewall/nftables-nat.tmpl index 340ab3678..343807e79 100644 --- a/data/templates/firewall/nftables-nat.tmpl +++ b/data/templates/firewall/nftables-nat.tmpl @@ -3,11 +3,22 @@ # Start with a "clean" NAT table
flush table nat
+{% for rule in init_deinit -%}
+# Add or remove conntrack helper rules for NAT operation-
+{{ rule }}
+{% endfor %}
+
add chain ip raw NAT_CONNTRACK
-add rule ip raw PREROUTING position 25 counter jump VYATTA_CT_HELPER
-add rule ip raw PREROUTING position 17 counter jump NAT_CONNTRACK
-add rule ip raw OUTPUT position 26 counter jump VYATTA_CT_HELPER
-add rule ip raw OUTPUT position 21 counter jump NAT_CONNTRACK
+
+# insert rule after VYATTA_CT_IGNORE
+add rule ip raw PREROUTING position {{ pre_ct_ignore }} counter jump VYATTA_CT_HELPER
+# insert rule after VYATTA_CT_PREROUTING_HOOK
+add rule ip raw PREROUTING position {{ pre_ct_conntrack }} counter jump NAT_CONNTRACK
+# insert rule after VYATTA_CT_IGNORE
+add rule ip raw OUTPUT position {{ out_ct_ignore }} counter jump VYATTA_CT_HELPER
+# insert rule after VYATTA_CT_PREROUTING_HOOK
+add rule ip raw OUTPUT position {{ out_ct_conntrack }} counter jump NAT_CONNTRACK
+
add rule ip raw NAT_CONNTRACK counter accept
|