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CSF problem: error sending response: host unreachable

Discussion in 'General Discussion' started by Zion Ahead, Aug 21, 2008.

  1. Zion Ahead

    Zion Ahead Well-Known Member

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    I get this error every few weeks on this cpanel box with csf firewall. Reboot won't fix it. This happens sporadically out of the blue for no reason every now and then.

    Aug 21 08:04:24 server named[24185]: client 65.55.178.23#51588: error sending
    response: host unreachable
    Aug 21 08:04:25 server named[24185]: client 66.96.85.248#48646: error sending
    response: host unreachable

    ns1.domain.com returned (SERVFAIL)

    Stopping csf does not resolve the problem. I uninstalled csf, that solved the problem but I need csf installed anyway.

    Attached is the default csf setup when installed, so I don't know why this is happening.
     

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    #1 Zion Ahead, Aug 21, 2008
    Last edited: Aug 21, 2008
  2. chae

    chae Well-Known Member

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    Same here every now & again I get the odd email warning stating host is unreachable or service has timeout, then it goes as quick as it came...can't too bad as the servers full of customers & no one has mentioned anything about outages, glitches or services not being reached.
     
  3. FC5_Slut

    FC5_Slut Member

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    I am also a bit curious as CSF is fairly useful...
     
  4. Infopro

    Infopro cPanel Sr. Product Evangelist
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  5. Zion Ahead

    Zion Ahead Well-Known Member

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    Still having this issue!!! This is getting ridiculous.

    Everytime I stop csf and flush iptlabes, the server halts and has to be rebooted (after flushing iptables via iptables --flush command)

    Kernel:
    Linux 2.6.9-78.0.1.ELsmp #1 SMP Tue Aug 5 11:02:47 EDT 2008 i686 i686 i386 GNU/Linux

    CSF:
    v4.09

    Cpanel:
    WHM 11.23.2 cPanel 11.23.6-R27225

    Now messages log says

    bandmin: iptables: Resource temporarily unavailable

    This is entirely now. Somehow CSF restarts itself also automatically after a few minutes, go figure.

    All dns zones do not load until csf is stopped


    After a reboot, zones start loading. All of a sudden after a few minutes of continual zone loading, it starts showing errors


    Sep 22 08:59:27 server6 named[12052]: zone domain.ws/IN: loaded serial 2008062500
    Sep 22 08:59:27 server6 named[12052]: zone domain.ws/IN: loaded serial 2008071803
    Sep 22 08:59:27 server6 named[12052]: zone domain.ws/IN: loaded serial 2006081301
    Sep 22 08:59:27 server6 named[12052]: zone domain.xom/IN: loaded serial 2006101901
    Sep 22 08:59:27 server6 named[12052]: zone domain.co.za/IN: loaded serial 2008091500
    Sep 22 08:59:27 server6 named[12052]: zone domain.co.za/IN: loaded serial 2008091500
    Sep 22 08:59:27 server6 named[12052]: running
    Sep 22 08:59:27 server6 kernel: Firewall: *UDP_OUT Blocked* IN= OUT=eth0 SRC=xxx.xxx.122.197 DST=86.35.14.42 LEN=144 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=53 DPT=29961 LEN=124
    Sep 22 08:59:27 server6 named[12052]: client 86.35.14.42#29961: error sending response: host unreachable
    Sep 22 08:59:27 server6 kernel: Firewall: *UDP_OUT Blocked* IN= OUT=eth0 SRC=xxx.xxx.122.197 DST=86.35.14.43 LEN=144 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=53 DPT=65457 LEN=124
    Sep 22 08:59:27 server6 named[12052]: client 86.35.14.43#65457: error sending response: host unreachable
    Sep 22 08:59:27 server6 named[12052]: client 86.35.14.43#11685: error sending response: host unreachable
    Sep 22 08:59:27 server6 kernel: Firewall: *UDP_OUT Blocked* IN= OUT=eth0 SRC=xxx.xxx.122.197 DST=86.35.14.43 LEN=155 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=53 DPT=11685 LEN=135
    Sep 22 08:59:27 server6 named: named startup succeeded
    Sep 22 08:59:27 server6 named[12052]: client 24.29.103.10#35565: error sending response: host unreachable
    Sep 22 08:59:27 server6 kernel: Firewall: *UDP_OUT Blocked* IN= OUT=eth0 SRC=xxx.xxx.122.197 DST=24.29.103.10 LEN=184 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=53 DPT=35565 LEN=164
    Sep 22 08:59:27 server6 named[12052]: client 24.29.103.10#20850: error sending response: host unreachable
    Sep 22 08:59:27 server6 kernel: Firewall: *UDP_OUT Blocked* IN= OUT=eth0 SRC=xxx.xxx.122.197 DST=24.29.103.10 LEN=184 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=53 DPT=20850 LEN=164
    Sep 22 08:59:28 server6 named[12052]: client 86.35.14.43#35709: error sending response: host unreachable
    Sep 22 08:59:28 server6 named[12052]: client 24.29.103.10#63588: error sending response: host unreachable
    Sep 22 08:59:28 server6 named[12052]: client 24.29.103.10#18178: error sending response: host unreachable
    Sep 22 08:59:28 server6 named[12052]: client 24.29.103.10#39041: error sending response: host unreachable
    Sep 22 08:59:28 server6 named[12052]: client 24.29.103.10#2813: error sending response: host unreachable
    Sep 22 08:59:28 server6 named[12052]: client 24.29.103.10#1422: error sending response: host unreachable
    Sep 22 08:59:28 server6 named[12052]: client 24.29.103.10#16528: error sending response: host unreachable
    Sep 22 08:59:28 server6 named[12052]: client 24.29.103.10#28807: error sending response: host unreachable
    Sep 22 08:59:28 server6 named[12052]: client 24.29.103.10#32147: error sending response: host unreachable
    Sep 22 08:59:28 server6 named[12052]: client 24.29.103.10#29489: error sending response: host unreachable
    Sep 22 08:59:28 server6 named[12052]: client 24.29.103.10#12096: error sending response: host unreachable
    Sep 22 08:59:28 server6 named[12052]: client 57.67.17.180#59088: error sending response: host unreachable
     
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