for some reason during the day, my websites will die. the pages will just say "this page can not be displayed". when i reboot, they come back online. my logs have been filling up with this:

Sep 29 18:05:34 plesk kernel: Packet log: input DENY eth0 PROTO=17 151.202.173.29:137 xxx.xxx.xxx.xxx L=78 S=0x00 I=54703 F=0x0000 T=112 (#52)
Sep 29 18:05:35 plesk kernel: Packet log: input DENY eth0 PROTO=17 151.202.173.29:137 xxx.xxx.xxx.xxx L=78 S=0x00 I=54725 F=0x0000 T=112 (#52)
Sep 29 18:05:37 plesk kernel: Packet log: input DENY eth0 PROTO=17 151.202.173.29:137 xxx.xxx.xxx.xxx L=78 S=0x00 I=54727 F=0x0000 T=112 (#52)
Sep 29 18:05:56 plesk kernel: Packet log: input DENY eth0 PROTO=17 151.202.173.29:137 xxx.xxx.xxx.xxxL=78 S=0x00 I=54780 F=0x0000 T=112 (#52)

and this:

Sep 29 21:59:14 plesk /usr/local/psa/named/sbin/named[682]: lame server on 'www.domain.com' (in 'domain.com'?): 216.40.247.130#53
Sep 29 21:59:14 plesk /usr/local/psa/named/sbin/named[682]: lame server on 'www.domain.com' (in 'domain.com'?): 216.40.247.133#53


is the first one some kind of hack attempt? the second one is pointing to a domain that i removed a while back, and the ip addresses are those to my nameservers.

i'm not sure what that means, but if you do, could you point me in the right direction?

This message will explain the details of the first set of log items...

The lame server message is not uncommon, and is probably not causing the problem.

Are you up to date on the security patches on your server?