diff --git a/example/defaults.conf b/example/defaults.conf
index 5517212..7468722 100644
--- a/example/defaults.conf
+++ b/example/defaults.conf
@@ -14,7 +14,6 @@
     short_name: osmo-gsm-tester-msc
     long_name: osmo-gsm-tester-msc
     encryption: a5_0
-    authentication: optional
 
 msc:
   net:
diff --git a/src/osmo_gsm_tester/templates/osmo-bsc.cfg.tmpl b/src/osmo_gsm_tester/templates/osmo-bsc.cfg.tmpl
index c1f3cc7..18b2321 100644
--- a/src/osmo_gsm_tester/templates/osmo-bsc.cfg.tmpl
+++ b/src/osmo_gsm_tester/templates/osmo-bsc.cfg.tmpl
@@ -33,7 +33,6 @@
  long name ${bsc.net.long_name}
  location updating reject cause 13
  encryption ${bsc.net.encryption}
- authentication ${bsc.net.authentication}
  neci 1
  rrlp mode none
  mm info 1