Okay for those of you having problems signing into the PSN like I was. I have always had my own LAN. Local Area Network in my home, I orginally had a PS3 Fat, well it died on me. Bought the slim and left all the network setting for the PS3 on Automatic. Well recently I could not login to the PSN at all. Now all of my computers, laptops, and other devices all have the own static IP address to avoid getting mixed up on the network.
Now I don't know how familiar you guys are about setting up your network so that you use internal LAN IP's as opposed to using dynamic/automatic IP setup.
Now router will vary, I have a Linksys so we'll go from their, but all routers are pretty much the same. To setup a LAN along with the PS3.
Your router should have something like LAN IP Address, this is basically the start of they what is called a block. Example 192.168.1.1
Then you have subnet mask, Example 255.255.255.0
Now these will work for most people but you are free to use whatever you want, don't worry, changing this will not hurt.
Next, your router settings should have something like DHCP.
Make sure you enable DHCP Server, usually off by default.
Starting IP, again default, Example 192.168.1.1 Note: Router will always be the first on the network, from then on all of your devices, Example PS3
Number of DHCP Users, this is how many devices you want on your LAN/Network, set it 1-255
That's pretty much it on the Router/LAN Side.
Now for the PS3:
Go into your PS3 network settings:
Now the numbers will vary as this is just an example,
Duplex Speed: Auto
IP Address: 192.168.1.2
Subnet Mask: 255.255.255.0
Default Gateway/Router: 192.168.1.1
Primary DNS: 22.214.171.124
Secondary DNS: 126.96.36.199
DNS I gave are free and from OPEN DNS, your internet provider should provide you with their DNS to you or use those.
Note: It seems OPEN DNS has changed the way you use their DNS numbers, and now you have to signup. However google has free public DNS servers, and in recent posts it seems that this could be an issue with AT&T. So with that said I added the Google DNS IP's. Now if you want too use OPEN DNS here is the link for them http://www.opendns.com/ also here is the link for Google's free DNS as well, http://code.google.com/speed/public-dns/
Remember that the router will always start at 1 and devices from then on will be 2 and so on.
Thats it, hope this helps, it improved it for me.
What you are doing is setting up a static LAN IP to the PS3, so that the network or PS3 doesn't get confused over the network.
Now some routers maybe different. I have used this for years and never had a issue with it, what sort of issue are you having?