NO! Do NOT blindly allow traffic to pass thru your firewall. That's like leaving the door to hour house UNLOCKED because people knock on it. You need to investigate this further before doing anything. First, is ANYTHING on your network NOT working? Is there something you could do or some function you could do before that you cannot do now?
TO blindly allow traffic may open you to any number of things, such as remote control programs, bot and zombie attackes and who knows what else. And if your compromised system(s) attacks other systems, you might very well be in for legal or civil action as well. That being said....
nded out by routers (such as the Sygate, LinkSys, DLink, etc) to provide network connectivity inside or behind the router's firewall.
There is no such thing as a 'udp address'. You are speaking of UDP ports. And if you can observe the router log, you need to report what UDP port the router is blocking. Once you discover what port is being blocked, it is simple to do a search and find out, possibly, what those ports are used for. You can find out if the blocked ports are used by hackers for various and nefarious purposes (like BackOrifice, which is a sinister remote control program) or whatever.
If the IPs in question are hammering the OUTSIDE interface of your router, then there is reason to believe that the source addresses are trying to access something inside your internal LAN.
You MUST provide MORE information than this to troubleshoot this issue. If you are NOT using the wireless functions of your router, disable the wireless. YOU must provide more information as to the layout and architecture of your network. I can tell you that hat you are seeing has noting to with wireless on your end. You might have a couple of piggy backers trying to access your router, though. Shut down the wireless features and see if the issue stops.
Also, you NEED to track down the source of the blocked traffic (it very well might be an attack agains you). Like I said, it might be something on your internal NETWORK or something as innocuous as a wireless pinter. Then again it might by one of your neighbor's kids Xbox or Wii or PS3 that is ripping you off by riding your internet connection (That too, is illegal). Track it down and act accordingly.