fix(pgw): add troubleshooting

Author: RoRoJ

pages/public-gateways/how-to/use-ssh-bastion.mdx

@@ -180,4 +180,6 @@ Carry out the following steps to avoid the need to repeat `-J bastion@<public-IP
 
 ## SSH bastion limitations and troubleshooting
 
-Note that you cannot use Public Gateway SSH bastion to connect to resources such as Managed Databases, which are not compatible with SSH.
+Note that you cannot use Public Gateway SSH bastion to connect to resources such as Managed Databases, which are not compatible with SSH.
+
+If you are having trouble matching SSH key fingerprints logged for Public Gateway in Cockpit, to SSH key fingerprints as shown in the Project settings section of the Scaleway console, see our [dedicated troubleshooting guide](/public-gateways/troubleshooting/ssh-key-format/).

pages/public-gateways/troubleshooting/ssh-key-format.mdx

@@ -0,0 +1,8 @@
+---
+title: I am having trouble verifying Public Gateway SSH key fingerprints from Cockpit
+description: Learn how to verify Public Gateway SSH key fingerprints when they appear in different formats (SHA1 in Cockpit and MD5 in the console) and resolve confusion for accurate key matching
+tags: public-gateway ssh fingerprint cockpit logs sha1 md5
+dates:
+  validation: 2025-07-23
+  posted: 2025-07-23
+---