strange logs

[michael]

i have a strange occurence going on on my gnatbox. suddenly this afternoon i've been getting multiple messages on the gnatbox message screen. here is what i am recieving.....   Jan 5 22:32:43  FILTER: remote access filter blocks:UDP bcast fxp0 [199.245.180.13/1015] ->[255.255.255.255/1015] l=148   JAN 5 22:35:56  last message repeated 22 times JAN 5 22:37:41  last message repeated 71 times     these messages keep repeating over and over   obviously it is gnatbox blocking access into my internal lan,BUT when i ping this address i get no response. if i do a DNS lookup i get a " cannot resolve " message.   is someone trying to get into me with a spoofed address? how can i stop this?   any help would be appreciated.   tia michael g