messages log

I see a lot of these messages, what do they mean?

Code:

Nov 28 21:33:20 vps1 named[730]: client 217.6.54.48#65095: view external: query (cache) 'domain.nl/MX/IN' denied
Nov 28 21:33:20 vps1 named[730]: client 217.6.54.48#50210: view external: query (cache) 'domain.nl/MX/IN' denied

Also, i get a huge amount of IP block messages in this log file. Is this normal? Or should i take extra action with extra software, if so, what would you recommend?

Code:

Nov 28 21:12:45 vps1 PAM-hulk[12983]: Brute force detection active: 580 LOGIN DENIED -- TOO MANY FAILURES -- IP TEMP BANNED
Nov 28 21:12:45 vps1 PAM-hulk[13162]: Brute force detection active: 580 LOGIN DENIED -- TOO MANY FAILURES -- IP TEMP BANNED