diff --git a/service/donate.md b/service/donate.md
index d0c2c7772ab95aec085e62c12936575e331f6f42..ff5c2294e5bb89d6448ea648c1ff6a9cfb1e9ec8 100644
--- a/service/donate.md
+++ b/service/donate.md
@@ -406,7 +406,8 @@ the tunnel:
     ipsec up civicrm::crm-int-01
 
 If still unsuccessful, check the output from that command, or logs from
-strongswan.
+strongSwan. See also the [IPsec documentation](howto/ipsec) for more
+troubleshooting tricks.
 
 If the tunnel is up, you can check that you can reach the service from the
 frontend server: