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-rwxr-xr-xsrc/conf_mode/nat.py16
1 files changed, 12 insertions, 4 deletions
diff --git a/src/conf_mode/nat.py b/src/conf_mode/nat.py
index 96f8f6fb6..9f319fc8a 100755
--- a/src/conf_mode/nat.py
+++ b/src/conf_mode/nat.py
@@ -1,6 +1,6 @@
#!/usr/bin/env python3
#
-# Copyright (C) 2020-2021 VyOS maintainers and contributors
+# Copyright (C) 2020-2022 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
@@ -28,6 +28,7 @@ from vyos.configdict import dict_merge
from vyos.template import render
from vyos.template import is_ip_network
from vyos.util import cmd
+from vyos.util import run
from vyos.util import check_kmod
from vyos.util import dict_search
from vyos.validate import is_addr_assigned
@@ -179,12 +180,19 @@ def verify(nat):
return None
def generate(nat):
- render(nftables_nat_config, 'firewall/nftables-nat.tmpl', nat,
- permission=0o755)
+ render(nftables_nat_config, 'firewall/nftables-nat.tmpl', nat)
+
+ # dry-run newly generated configuration
+ tmp = run(f'nft -c -f {nftables_nat_config}')
+ if tmp > 0:
+ if os.path.exists(nftables_ct_file):
+ os.unlink(nftables_ct_file)
+ raise ConfigError('Configuration file errors encountered!')
+
return None
def apply(nat):
- cmd(f'{nftables_nat_config}')
+ cmd(f'nft -f {nftables_nat_config}')
if os.path.isfile(nftables_nat_config):
os.unlink(nftables_nat_config)