1. Please take a little time for this simple survey! Thank you for participating!
    Dismiss Notice
  2. Dear Pleskians, please read this carefully! New attachments and other rules Thank you!
    Dismiss Notice
  3. Dear Pleskians, I really hope that you will share your opinion in this Special topic for chatter about Plesk in the Clouds. Thank you!
    Dismiss Notice

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

Discussion in 'Plesk 9.x for Linux Issues, Fixes, How-To' started by Lord Senil, Oct 28, 2009.

  1. Lord Senil

    Lord Senil Guest

    0
     
    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 :p

    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. ^^
     
  2. IgorG

    IgorG Forums Analyst Staff Member

    49
    24%
    Joined:
    Oct 27, 2009
    Messages:
    24,572
    Likes Received:
    1,243
    Location:
    Novosibirsk, Russia
    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.
     
  3. Lord Senil

    Lord Senil Guest

    0
     
    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.
     
    Last edited by a moderator: Nov 5, 2009
Loading...