sometimes cwp server bind dns server is automatic failed

some times cwp server bind dns server is automatic failed, then my all site is going down. what is the main reason

Oct 23 03:36:03 server1 kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:00:16:3c:93:19:58:08:00 SRC=199.192.19.170 DST=255.255.255.255 LEN=253 TOS=0x00 PREC=0x00 TTL=64 ID=50181 DF PROTO=UDP SPT=11002 DPT=11002 LEN=233
Oct 23 03:36:05 server1 kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:00:16:3c:93:19:58:08:00 SRC=199.192.19.170 DST=255.255.255.255 LEN=253 TOS=0x00 PREC=0x00 TTL=64 ID=50975 DF PROTO=UDP SPT=11002 DPT=11002 LEN=233
Oct 23 03:36:07 server1 kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:00:16:3c:93:19:58:08:00 SRC=199.192.19.170 DST=255.255.255.255 LEN=253 TOS=0x00 PREC=0x00 TTL=64 ID=51830 DF PROTO=UDP SPT=11002 DPT=11002 LEN=233
Oct 23 03:36:09 server1 kernel: Firewall: *UDP_IN Blocked* IN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:00:16:3c:93:19:58:08:00 SRC=199.192.19.170 DST=255.255.255.255 LEN=253 TOS=0x00 PREC=0x00 TTL=64 ID=52966 DF PROTO=UDP SPT=11002 DPT=11002 LEN=233
Oct 23 03:36:10 server1 kernel: Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC=00:16:3c:02:4f:ba:64:64:9b:4f:37:00:08:00 SRC=79.110.62.245 DST=68.65.121.2 LEN=40 TOS=0x00 PREC=0x00 TTL=247 ID=48838 PROTO=TCP SPT=55282 DPT=24225 WINDOW=1024 RES=0x00 SYN URGP=0

Well first off, what you posted isn't BIND.

It's from the Firewall and shows 4 UDP and 1 TCP blocks.
And look more like what it would show when your logged out, the CSF are more detailed than this.

Public or NAT?

Can you do snapshot of your CWP Info & System Info windows?