fix: removed unnecressary peer ID handling that is no longer required for >=5.0 StrongSwan.

debian-package/src/usr/lib/vpn-router/vpnrouter.py

@@ -190,6 +190,12 @@ def validate(cfg):
                 raise ConfigError(
                     f'{section}.{option} is required in mode {mode or "manual"}')
 
+    for section, option in (('wan', 'local_fqdn'), ('remote', 'id')):
+        if str(_get(cfg, section, option)).startswith('@'):
+            raise ConfigError(
+                f'{section}.{option}: remove the leading @; strongSwan reads an '
+                'address as an IP identity and a name as an FQDN')
+
     id_mode = _get(cfg, 'wan', 'local_id_mode')
     if id_mode and id_mode not in ID_MODES:
         raise ConfigError(
@@ -424,7 +430,7 @@ def build_context(cfg, local_id_override=None):
     if local_id_override:
         local_id = local_id_override
     elif id_mode == 'fqdn':
-        local_id = f'@{local_fqdn}' if local_fqdn else ''
+        local_id = local_fqdn
     elif id_mode == 'internal_ip':
         local_id = int_addr
     else: