UDP Flood due to Norton AV?

Sorry if this duplicates - I tried posting this a little bit ago but don't see the thread in the forum. 

I have a computer that has Norton's AV. It is the only Symantec product I use or own. My router is getting hit with constant UDP floods with a source addy tied to Symantec. How do I get this to stop? Is it a setting I need to handle in Norton AV or is this something else going on with Symantec.

Thanks, in advance, for the help.

Steve

Router Log:

Jul 13 14:37:33

 

IPTABLES UDP-FLOOD: IN=vlan1 OUT= MAC=ec:1a:59:47:1a:a1:00:17:10:8a:12:15:08:00:45:00:00:b0:00:00:40:00:38:11:6b:22:c6:99 SRC=198.153.192.120 DST=my.router-wan-interface.address LEN=176 TOS=00 PREC=0x00 TTL=56 ID=0 DF PROTO=UDP SPT=53 DPT

Source Address IP Lookup:

Source: whois.arin.net

IP Address: 198.153.192.120 (United States)

Name: NETBLK-OPENVISION

Handle: NET-198-153-190-0-1

Registration Date: 8/11/93

Range: 198.153.190.0-198.153.196.255

Org: Symantec Corporation

Org Handle: SYMN-Z

Address: 350 Ellis St.

City: Mountain View

State/Province: CA

Postal Code: 95117

Country: UNITED STATES