Merge pull request #3098 from vyos/mergify/bp/sagitta/pr-3088

T6075: firewall and NAT: check if interface-group exists when using them in firewall|nat rules. (backport #3088)

2 files changed, 27 insertions, 0 deletions

diff --git a/src/conf_mode/firewall.py b/src/conf_mode/firewall.py
index acb7dfa41..3c27655b0 100755
--- a/src/conf_mode/firewall.py
+++ b/src/conf_mode/firewall.py
@@ -282,6 +282,15 @@ def verify_rule(firewall, rule_conf, ipv6):
         if direction in rule_conf:
             if 'name' in rule_conf[direction] and 'group' in rule_conf[direction]:
                 raise ConfigError(f'Cannot specify both interface group and interface name for {direction}')
+            if 'group' in rule_conf[direction]:
+                group_name = rule_conf[direction]['group']
+                if group_name[0] == '!':
+                    group_name = group_name[1:]
+                group_obj = dict_search_args(firewall, 'group', 'interface_group', group_name)
+                if group_obj is None:
+                    raise ConfigError(f'Invalid interface group "{group_name}" on firewall rule')
+                if not group_obj:
+                    Warning(f'interface-group "{group_name}" has no members!')
 
 def verify_nested_group(group_name, group, groups, seen):
     if 'include' not in group:
diff --git a/src/conf_mode/nat.py b/src/conf_mode/nat.py
index 26822b755..b3f38c04a 100755
--- a/src/conf_mode/nat.py
+++ b/src/conf_mode/nat.py
@@ -153,6 +153,15 @@ def verify(nat):
                 elif 'name' in config['outbound_interface']:
                     if config['outbound_interface']['name'] not in 'any' and config['outbound_interface']['name'] not in interfaces():
                         Warning(f'NAT interface "{config["outbound_interface"]["name"]}" for source NAT rule "{rule}" does not exist!')
+                else:
+                    group_name = config['outbound_interface']['group']
+                    if group_name[0] == '!':
+                        group_name = group_name[1:]
+                    group_obj = dict_search_args(nat['firewall_group'], 'interface_group', group_name)
+                    if group_obj is None:
+                        raise ConfigError(f'Invalid interface group "{group_name}" on source nat rule')
+                    if not group_obj:
+                        Warning(f'interface-group "{group_name}" has no members!')
 
             if not dict_search('translation.address', config) and not dict_search('translation.port', config):
                 if 'exclude' not in config and 'backend' not in config['load_balance']:
@@ -177,6 +186,15 @@ def verify(nat):
                 elif 'name' in config['inbound_interface']:
                     if config['inbound_interface']['name'] not in 'any' and config['inbound_interface']['name'] not in interfaces():
                         Warning(f'NAT interface "{config["inbound_interface"]["name"]}" for destination NAT rule "{rule}" does not exist!')
+                else:
+                    group_name = config['inbound_interface']['group']
+                    if group_name[0] == '!':
+                        group_name = group_name[1:]
+                    group_obj = dict_search_args(nat['firewall_group'], 'interface_group', group_name)
+                    if group_obj is None:
+                        raise ConfigError(f'Invalid interface group "{group_name}" on destination nat rule')
+                    if not group_obj:
+                        Warning(f'interface-group "{group_name}" has no members!')
 
             if not dict_search('translation.address', config) and not dict_search('translation.port', config) and 'redirect' not in config['translation']:
                 if 'exclude' not in config and 'backend' not in config['load_balance']: