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-rw-r--r--data/templates/firewall/nftables-nat.tmpl49
1 files changed, 39 insertions, 10 deletions
diff --git a/data/templates/firewall/nftables-nat.tmpl b/data/templates/firewall/nftables-nat.tmpl
index 929cae563..928f4ecfe 100644
--- a/data/templates/firewall/nftables-nat.tmpl
+++ b/data/templates/firewall/nftables-nat.tmpl
@@ -74,23 +74,52 @@ add rule ip nat {{ chain }} iifname "{{ iface }}" {{ proto_dst_port }} {{ dst_ad
{% endfor %}
-{% for r in source -%}
+{% for r in source if not r.disabled -%}
+{% set chain = "POSTROUTING" %}
+{% set dst_addr = "ip daddr " + r.dest_address if r.dest_address %}
+{% set dst_port = "dport { " + r.dest_port +" }" if r.dest_port %}
+{% set trns_addr = "snat to " + r.translation_address %}
+{% set trns_port = ":" + r.translation_port if r.translation_port %}
+{% set comment = "SRC-NAT-" + r.number %}
+{% set iface = r.interface_out %}
+
{% if r.log %}
{% if r.exclude %}
-{% set value = 'EXCL' %}
+{% set log = "[" + comment + "-EXCL]" %}
{% elif r.translation_address == 'masquerade' %}
-{% set value = 'MASQ' %}
+{% set log = "[" + comment + "-MASQ]" %}
+{% else %}
+{% set log = "[" + comment + "]" %}
{% endif %}
- add rule ip nat POSTROUTING oifname "{{ r.interface_out }}" ip saddr {{ r.source_address }} counter log prefix "[NAT-SRC-{{ r.number }}-{{ value }}]" comment "SRC-NAT-{{ r.number }}"
{% endif %}
{% if r.exclude %}
-{% set value = 'return' %}
-{% elif r.translation_address == 'masquerade' %}
-{% set value = 'masquerade' %}
+{# rule has been marked as "exclude" thus we simply return here #}
+{% set trns_addr = "return" %}
+{% set trns_port = "" %}
+{% endif %}
+
+{% if r.protocol == 'tcp_udp' %}
+{# Special handling for protocol tcp_udp which is represented as two individual rules #}
+{% set comment = comment + " tcp_udp" %}
+{% if log %}
+
+{% set tcp_dst_port = "tcp " + dst_port if dst_port else "ip protocol tcp" %}
+{% set udp_dst_port = "udp " + dst_port if dst_port else "ip protocol udp" %}
+
+add rule ip nat {{ chain }} oifname "{{ iface }}" {{ tcp_dst_port }} {{ dst_addr }} counter log prefix "{{ log }}" comment "{{ comment }}"
+{% endif %}
+add rule ip nat {{ chain }} oifname "{{ iface }}" {{ tcp_dst_port }} {{ dst_addr }} counter {{ trns_addr }}{{ trns_port }} comment "{{ comment }}"
+{% if log %}
+add rule ip nat {{ chain }} oifname "{{ iface }}" {{ udp_dst_port }} {{ dst_addr }} counter log prefix "{{ log }}" comment "{{ comment }}"
+{% endif %}
+add rule ip nat {{ chain }} oifname "{{ iface }}" {{ udp_dst_port }} {{ dst_addr }} counter {{ trns_addr }}{{ trns_port }} comment "{{ comment }}"
+
{% else %}
-{% set value = 'snat to ' + r.translation_address %}
+{% set proto_dst_port = dst_port if dst_port else "ip protocol " + r.protocol %}
+{% if log %}
+add rule ip nat {{ chain }} oifname "{{ iface }}" {{ proto_dst_port }} {{ dst_addr }} counter log prefix "{{ log }}" comment "{{ comment }}"
+{% endif %}
+add rule ip nat {{ chain }} oifname "{{ iface }}" {{ proto_dst_port }} {{ dst_addr }} counter {{ trns_addr }}{{ trns_port }} comment "{{ comment }}"
{% endif %}
- add rule ip nat POSTROUTING oifname "{{ r.interface_out }}" ip saddr {{ r.source_address }} counter {{ value }} comment "SRC-NAT-{{ r.number }}"
{% endfor %}
-