Since PDM archive servers will connect with other archive servers for replication. Need to test after port 3030 protected by Curtain Server Plugin,.
1. Open SOLIDOWKRS PDM Administration
2. Double click PDM Vault to login
3. Acces to Replication -> Replication settings
4. Tick the “Source Server” which have enabled port 3030 by Curtain Server Plugin -> Test
5. Click “Test” button, if status show “Succeeded”, means replication works.
6. If not, need to setup excetpion rule in Curtain Server Plugin.
For related information, please refer to FAQ 00209 - How to protect SolidWorks Enterprise PDM (EPDM) | 
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Curtain e-locker