A lot of "Firewall: *UDP_OUT Blocked*" on ports 67 and 68

[Lord Senil]

Hello, some time ago I installed an application on my CentOS 5.3 call csf / lfd I have solved a lot of problems. The only detail worth noting is that now when I do a dmesg gives me a huge list on the firewall:

[149688.784131] Firewall: *UDP_OUT Blocked* IN= OUT=eth0 SRC=87.106.177.*** DST=87.106.137.250 LEN=328 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=68 DPT=67 LEN=308
[149703.783775] Firewall: *UDP_OUT Blocked* IN= OUT=eth0 SRC=87.106.177.*** DST=87.106.137.250 LEN=328 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=68 DPT=67 LEN=308
[149720.783555] Firewall: *UDP_OUT Blocked* IN= OUT=eth0 SRC=87.106.177.*** DST=87.106.137.250 LEN=328 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=68 DPT=67 LEN=308
[149739.783188] Firewall: *UDP_OUT Blocked* IN= OUT=eth0 SRC=87.106.177.*** DST=87.106.137.250 LEN=328 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=68 DPT=67 LEN=308

Note: asterisk put for me, is my IP

So I guess, seems to be a DHCP traffic. Not if it is correct or is this traffic that I have to configure the firewall to let it go I do not congested traffic and the server.
I have a Plesk 9.2.3 server with CentOS 5.3 and csf / lfd

Thanks in advance. ^^

 

[IgorG]

Firewall for Plesk server should be configured according following list of ports that should be opened for correct Plesk operation: http://kb.odin.com/en/391
As you can see there are no mentions about ports 67 and 68. Therefore I'm not sure that it is Plesk related traffic.

 

[Lord Senil]

Thanks, I found that the cause of this traffic is the dhclient program, I've uninstalled and I killed the process that was underway. Now there is nothing unusual.
But there was a problem much bigger, and that is that novice that I am, I realized that this daemon is necessary to lift the network server to reboot!
Dhclient desinstaleis not for anything!

Greetings and thanks for the quick reply.