How to Fix PlayStation Error Code WS-37397-9 (Network Connection Ban Glitch)

by

PlayStation Error Code WS-37397-9 is a highly disruptive network error that locks your console completely out of the PlayStation Network (PSN). This error indicates that Sony’s authentication servers have temporarily flagged or blocked your local IP address due to anomalous network traffic or automated security system false positives.

Whether this network block is caused by a recycled IP address from your Internet Service Provider or a jammed local router data cache, you can clear it. Follow this step-by-step troubleshooting guide to bypass error WS-37397-9 and regain online access.

Common Causes of Error WS-37397-9

  • Flagged IP Address Allocation: Your router was assigned an IP address previously flagged for spam by another user.
  • Corrupt Subnet Mask Cache: Local network infrastructure files sending distorted validation tokens to PSN servers.
  • Stale Router Firmware Routing: Internal routing tables blocking safe encryption handshakes with Sony data centers.

Method 1: Force an IP Address Release and Renewal

Because your internet provider assigns IP addresses automatically, completely resetting your connection hardware forces their network to give you a brand-new, clean IP address.

  1. Disconnect the physical power cable from the back of your internet router and modem hardware.
  2. Turn off your PlayStation console completely (do not put it into Rest Mode).
  3. Wait at least 5 to 10 full minutes to allow your internet provider’s system to fully release your old IP address.
  4. Plug your router and modem back into the wall, wait for all internet lights to turn green, then boot up your console.

Method 2: Reconfigure MTU Network Settings Manually

Modifying the Maximum Transmission Unit (MTU) size changes how data packets are grouped, allowing stuck connections to bypass rigid server blocks.

  1. Navigate to the PS4 or PS5 dashboard menu, open Settings, and select Network.
  2. Click Set Up Internet Connection, highlight your active network, and press the options button to select Advanced Settings.
  3. Locate MTU Settings and change the selection from Automatic to Manual.
  4. Change the numerical value from the default 1500 to 1473 or 1450.
  5. Save the settings, restart your network connection check, and attempt to sign into PSN.

Leave a Comment