FAQ
I use dyndns's (free) service to access a remote machine
with a dynamic IP address.
The machine is running under CentOS-6.0.

I can ssh into the address given me by dyndns (*.homelinux.com),
but when I do this I get the warning
"reverse mapping checking getaddrinfo for" *
"failed - POSSIBLE BREAK-IN ATTEMPT!"

This doesn't really matter,
as I normally use OpenVPN for accessing this site -
the dyndns method is a safety precaution in case openvpn doesn't work.

But I'm wondering if it is possible to stop the warning?
I've tried various recipes google gave me,
eg adding "UseDNS no" to /etc/ssh/sshd_config on the remote machine
(and re-starting sshd),
but none of them has worked,


--
Timothy Murphy
e-mail: gayleard /at/ eircom.net
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

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  • Rudi Ahlers at Sep 26, 2011 at 5:24 am

    On Sun, Sep 25, 2011 at 2:13 PM, Timothy Murphy wrote:
    I use dyndns's (free) service to access a remote machine
    with a dynamic IP address.
    The machine is running under CentOS-6.0.

    I can ssh into the address given me by dyndns (*.homelinux.com),
    but when I do this I get the warning
    "reverse mapping checking getaddrinfo for" *
    ?"failed - POSSIBLE BREAK-IN ATTEMPT!"

    This doesn't really matter,
    as I normally use OpenVPN for accessing this site -
    the dyndns method is a safety precaution in case openvpn doesn't work.

    But I'm wondering if it is possible to stop the warning?
    I've tried various recipes google gave me,
    eg adding "UseDNS no" to /etc/ssh/sshd_config on the remote machine
    (and re-starting sshd),
    but none of them has worked,


    --
    Add the DynDNS hostnane to the localmachine, i.e:


    192.168.0.10 mybox.homelinux.net


    and see if that helps?



    --
    Kind Regards
    Rudi Ahlers
    SoftDux

    Website: http://www.SoftDux.com
    Technical Blog: http://Blog.SoftDux.com
    Office: 087 805 9573
    Cell: 082 554 7532

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postedSep 25, '11 at 8:13a
activeSep 26, '11 at 5:24a
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Timothy Murphy: 1 post Rudi Ahlers: 1 post

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