Dst IP session limit
The log is full of this, where XXX.XXX.XX.XX is external DNS server, YY.YYY.YYY.YYY is my external ip, what happen? how to fix it? thanks.
2018-05-14 11:15:44 crit Dst IP session limit! From XXX.XXX.XX.XX:53 to YY.YYY.YYY.YYY:1222, proto UDP (zone Untrust, int ethernet0/6). Occurred 1 times.
2018-05-14 11:15:44 crit Dst IP session limit! From XXX.XXX.XX.XX:53 to YY.YYY.YYY.YYY:2287, proto UDP (zone Untrust, int ethernet0/6). Occurred 1 times.
2018-05-14 11:15:44 crit Dst IP session limit! From XXX.XXX.XX.XX:53 to YY.YYY.YYY.YYY:1640, proto UDP (zone Untrust, int ethernet0/6). Occurred 1 times.
2018-05-14 11:15:44 crit Dst IP session limit! From XXX.XXX.XX.XX:53 to YY.YYY.YYY.YYY:2936, proto UDP (zone Untrust, int ethernet0/6). Occurred 1 times.