Mn100 disconnect from computers and time and date...

hi i've used the router mn100 for years with few problems but lately the router randomnly disconnect from the pcs and after a reboot it connect again but in the security log it shows it's the year 1970 .it start to track the correct year after i click update the time settings.
any ideas?
ps:in the security log i notice that after connected it shows:
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
2008/01/03 17:15:54 Connection attempt to base station from WAN blocked -- src:<89.38.26.25:41632> dst:<68.255.250.166:19333>
2008/01/03 17:15:54 Connection attempt to base station from WAN blocked -- src:<60.167.229.49:4964> dst:<68.255.250.166:19333>
2008/01/03 17:15:54 Connection attempt to base station from WAN blocked -- src:<60.171.238.119:1316> dst:<68.255.250.166:19333>
2008/01/03 17:15:54 Connection attempt to base station from WAN blocked -- src:<60.52.37.64:4678> dst:<68.255.250.166:19333>
///////////////////////////////////////////////////////////////////////////////////////////////////
and so on forever why is it blocking this attempt?
can this attempt be just my isp trying to communicate with me?