Wednesday, November 16, 2011

ip_conntrack problem: error: "net.ipv4.ip_conntrack_max" is an unknown key

To fix this issue do the following:

1. modprobe ip_conntrack
2. lsmod |grep conn -- if you see entries it means modules have been loaded correctly
3. sysctl -w -- to write the changes you made under /etc/sysctl.conf
4. sysctl -p -- to view the changes and see if it was actually loaded.

4 comments:

  1. Hi,
    I tried this on Centos 6.2, this is my out:

    [root@osk006 etc]# modprobe ip_conntrack
    [root@osk006 etc]# lsmod | grep conn
    nf_conntrack_ipv4 9506 0
    nf_conntrack 79453 1 nf_conntrack_ipv4
    nf_defrag_ipv4 1483 1 nf_conntrack_ipv4
    [root@osk006 etc]# sysctl -w
    [root@osk006 etc]# sysctl -p
    error: "net.ipv4.netfilter.ip_conntrack_max" is an unknown key


    any idea or suggestion?

    thanks in advance,

    Daniele

    ReplyDelete
    Replies
    1. Hi,

      To fix this issue, you will have to restart your firewall. Cheers!!!

      Delete
  2. Hi,

    To fix this issue, you will have to restart your firewall. Cheers!!!

    ReplyDelete
  3. Hi,

    i have below error in my redhat linux server pls help

    bash-3.2# dmesg | more
    ssh-scan[8665]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8677]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8670]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8680]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8672]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8675]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8676]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8684]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8678]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8681]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8682]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8687]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8683]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8685]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8686]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8691]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8690]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8688]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8694]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8697]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8696]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8689]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8698]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8693]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8695]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4
    ssh-scan[8706]: segfault at 0000000000000000 rip 0000000008048e33 rsp 00000000fff70d20 error 4

    belwo is my redhat server details

    bash-3.2# uname -i
    x86_64

    bash-3.2# uname –a
    Linux mum-svr-asin-01 2.6.18-308.13.1.el5 #1 SMP Thu Jul 26 05:45:09 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux

    bash-3.2# cat /etc/issue
    Red Hat Enterprise Linux Server release 5.8 (Tikanga)
    Kernel \r on an \m

    pls help me

    reply me on
    prasadthorbole26@gmail.com

    regards,
    prasad

    ReplyDelete