I have a PS3 online and i've been playing online now for about 3 months but about 4 days ago i lost connection saying i needed an IP address, i found my IP address and i then tried setting my IP address manually and it has worked but it then says DNS error.

leave it for a week

you need to set up an account on ya PS3 then set up an e-mail and send to registered e-mail address and clik on the link in ya e-mail inbox to activate your PS3 account (think it's password protected too ) then happy playing if ya short on friend's add devilutd01 on PS3 .

I am guessing the PS3 is hooked up through a router, either wired or wirelessly. You need to browse the router setup for the IP address of the PS3, then put the IP of the PS3 into the DMZ, also in the router setup. This should clear up any connection problems

lol

I fixed it myself. Basically I bought a long ethernet cable and put all auto settings and it worked fine.

maybe the modem set is different from the modem in the lap top in other words maybe you ps3 needs higher and better connection

I look all over the net but could't find anything, until i found a site that said they
could show me how to fix any problem with my ps3. At first i was not so
sure about ordering the manual but i did, whats $5 plus i used paypal, but
long story short i fix my ps3, i recomend this site www.gameme.20fr.com
i hope this help you like it help me. PLAYSTATION FAN FOR LIFE! waiting on PS4

I guessing you live close to a neighbor that has an unsecured wireless network. It is possible that they changed their security settings to block out other IP addresses (meaning your PS3). The best solution would be to establish your own internet connection and/or wireless network thru a local broadband internet provider.

Try setting a static ip address on the PS3:-

First you need to find a Windows wired or wireless device already connected to the network in order to find out the required settings

Windows XP
1. Click start --> (sometimes settings) --> Control Panel --> Network Connections
2. Double click on the active connection which will say connected underneath
3. Click Support
4. Click Details
5. Now the IP Address, Subnet Mask, Default Gateway, Primary DNS and Alternate DNS which are displayed should be noted.

Windows Vista
1. Click Start --> Control Panel --> Network and Sharing Center
2. Click on "View Status" to the right of your connection
4. Click Details
5. Now the IP Address, Subnet Mask, Default Gateway, Primary DNS and Alternate DNS which are displayed should be noted.

Set these values under "manual settings" in the PS3 but add 1 to the last number for the IP Address as this has to be unique on your network

Go to tool box and delete cookies and offline file content.