Need to obtain my security code fordell router

There is a button to restore factory. You need to press this with a paper clip or something of that ilk.

Once you've restored it to factory defaults, you need to logon on:
User Name = admin
Password = admin

Both small case.

When you say "security code" I don't know if you mean password or network key. Either way, if you forgot it, you need to reset it.

Also, the default address to access the configuration pages is: http://my.router or http://192.168.2.1

Good Luck!