Article ID: 116815, created on Aug 20, 2013, last review on Jun 17, 2016

  • Applies to:
  • Virtuozzo containers for Linux 4.7


  1. Hardware node crashes
  2. NAT rules are configured on the node:

    ~# iptables-save
    # Generated by iptables-save v1.4.7 on Mon Jun 17 10:23:55 2013
    :PREROUTING ACCEPT [1459701:92183794]
    :POSTROUTING ACCEPT [1393565:88372460]
    :OUTPUT ACCEPT [30816:1864341]
    -A PREROUTING -d *.*.*.*/32 -p tcp -m tcp --dport 80 -j DNAT --to-destination *.*.*.*:80
    -A PREROUTING -d *.*.*.*/32 -p tcp -m tcp --dport 2222 -j DNAT --to-destination *.*.*.*:22
    -A PREROUTING -d *.*.*.*/32 -p tcp -m tcp --dport 4643 -j DNAT --to-destination *.*.*.*:4643
    -A PREROUTING -d *.*.*.*/32 -p tcp -m tcp --dport 4644 -j DNAT --to-destination *.*.*.*:4643
  3. Kernel version is lower then 2.6.32-042stab079.5:

    ~# uname -r


A kernel bug could be triggered in the nf_nat_setup_info() function under certain circumstances.


Install CU-2.6.32-042stab079.4 Parallels Virtuozzo Containers 4.7 Core Update to your node.

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