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+--- Thread: Error 903 (Can't connect to patching server) guide. (/showthread.php?tid=9503)
Error 903 (Can't connect to patching server) guide. - Anti Hacker - 01-05-2006
Depending on how many people ask about this and depending on how many people find this useful, it may want to be a sticky.
Okay, if you get this error, it can mean one of a few things is happening in my experience:
Your software (Windows XP security or anti virus/firewall) is blocking the patching. To solve this, disable the software temporarily or make Gameguard + PSOBB exempted from it.
The patching server is down for scheduled/emergency maintenance. Check the official site to see if this is the case.
Now we come to the most annoying one of all. Your router/modem has the wrong MTU value. It's probably something you wouldn't even think of.
What you need to do is make sure your routers MTU is set to 1420. I did this, and now I can patch fine. Unfortunately all routers are different and have different interfaces so look in your router manual or get some tech support to find out where to change things!
For me, I type my routers IP into the address bar and it comes up with a menu. After looking through the menus, I could change the MTU from the "Connection 1" sub-menu.
I hope this helps some people.
- Anti