diff --git a/deploy/strongswan.sh b/deploy/strongswan.sh
index 2de18f88..f991d690 100644
--- a/deploy/strongswan.sh
+++ b/deploy/strongswan.sh
@@ -16,17 +16,38 @@ strongswan_deploy() {
   _cca="$4"
   _cfullchain="$5"
 
+  _info "Using strongswan"
+
+  if [ -x /usr/sbin/ipsec ]; then
+    _ipsec=/usr/sbin/ipsec
+  elif [ -x /usr/sbin/strongswan ]; then
+    _ipsec=/usr/sbin/strongswan
+  else
+    _err "no strongswan or ipsec command is detected"
+    return 1
+  fi
+
+  _info _ipsec "$_ipsec"
+
+  _confdir=$($_ipsec --confdir)
+  if [ $? -ne 0 ] || [ -z "$_confdir" ]; then
+    _err "no strongswan --confdir is detected"
+    return 1
+  fi
+
+  _info _confdir "$_confdir"
+
   _debug _cdomain "$_cdomain"
   _debug _ckey "$_ckey"
   _debug _ccert "$_ccert"
   _debug _cca "$_cca"
   _debug _cfullchain "$_cfullchain"
 
-  cat "$_ckey" >"/etc/ipsec.d/private/$(basename "$_ckey")"
-  cat "$_ccert" >"/etc/ipsec.d/certs/$(basename "$_ccert")"
-  cat "$_cca" >"/etc/ipsec.d/cacerts/$(basename "$_cca")"
-  cat "$_cfullchain" >"/etc/ipsec.d/cacerts/$(basename "$_cfullchain")"
+  cat "$_ckey" >"${_confdir}/ipsec.d/private/$(basename "$_ckey")"
+  cat "$_ccert" >"${_confdir}/ipsec.d/certs/$(basename "$_ccert")"
+  cat "$_cca" >"${_confdir}/ipsec.d/cacerts/$(basename "$_cca")"
+  cat "$_cfullchain" >"${_confdir}/ipsec.d/cacerts/$(basename "$_cfullchain")"
 
-  ipsec reload
+  $_ipsec reload
 
 }
diff --git a/dnsapi/dns_ispconfig.sh b/dnsapi/dns_ispconfig.sh
index 6d1f34c5..1e500ad6 100755
--- a/dnsapi/dns_ispconfig.sh
+++ b/dnsapi/dns_ispconfig.sh
@@ -2,7 +2,6 @@
 
 # ISPConfig 3.1 API
 # User must provide login data and URL to the ISPConfig installation incl. port. The remote user in ISPConfig must have access to:
-# - DNS zone Functions
 # - DNS txt Functions
 
 # Report bugs to https://github.com/sjau/acme.sh