How to Fix Xbox Error Code Negative 345 Silver Wolf?

Sherry li
3 min readSep 28, 2020


Error code Negative 345 Silver Wolf has been reported by many players. It commonly happens while they are launching Call of Duty: Black Ops 4 on Xbox One and it comes with the following error message:

The Call of Duty: Black Ops 4 server is not available at this time. Please try again later or visit for update. Error Code: A.B.C.-E.F.G.H.I.J.K.L.M.-.-.-.Q.R.S.-.U. Negative 345 Silver Wolf

This usually happens due to internet connection issues. Here are some fixes which might be helpful for you. You can have a try.

Fix 1: Port Forward Call of Duty: Black Ops 4

Ports are essentially digital channels for your router. They are used for sorting incoming and outgoing internet traffic. Your console can be more accessible over the internet by port forwarding. It could help solve many issues related to low-latency games and chats on Xbox One. You can also try it to fix error code Negative 345 Silver Wolf. Here are the detailed steps.

Move 1: Check Your Xbox IP Address

At first, you should get the Xbox IP address.

Step 1: Restart your Xbox console and login to your account.

Step 2: Go to Settings > Network > Network Settings > Advanced Settings.

Step 3: In the IP settings section, locate the IP address under IPv4 section and note it down.

Move 2: Port Forward on the Router and Hard Reset Xbox

After getting your Xbox IP address, you can try port forwarding on your router.

Step 1: Open your web browser and login to your router on a PC.

Step 2: Go to the router’s port forwarding section. The user interface should be different between different routers. Therefore, you need to check your router’s manual if you don’t know how to find the option.

Step 3: Input your Xbox IP address in the IP address box, and then type the following values for your TCP and UDP ports.

Step 4: Save the settings and restart the router.

Step 5: Make sure your Xbox is turned on. Then press the Xbox button on the console and hold for about 10 seconds to completely shut down it.

Step 6: Disconnect the power cable and wait for a few minutes. Then reconnect the power cable and restart the console.

After hard resetting your Xbox console, you can run the game Call of Duty: Black Ops 4 again and check if the error code Negative 345 Silver Wolf disappears.

Fix 2: Use Your Mobile Hotspot

If port forwarding doesn’t help you solve Xbox error Negative 345 Silver Wolf, you might try using the mobile hotspot.

You should close the game Call of Duty: Black Ops 4 and create a Wi-Fi hotspot on your mobile phone. Then you just need to connect your Xbox console to the hotspot, and then launch the game and enter the multiplayer screen. If it works properly, please end the game, disconnect the Xbox from the hotspot, and connect to the regular Wi-Fi.

After that, restart your game and check if the error has been solved. If it still exists, you can also try using a VPN to solve the Xbox error Negative 345 Silver Wolf.

Originally published at on September 28, 2020.