Re: dhclient: avoiding hostname disclosure via DHCP request

On Mon, 2014-01-06 at 17:35 +0000, Robert Horovitz wrote:
Hi Dan,

thanks for your reply.

Ah, sorry.  That block is for the connection files
in /etc/NetworkManager/system-connections, if that's where the
connection is stored.

If the connection is instead stored in an ifcfg file on Fedora or RHEL,
then you'll want to use "DHCP_SEND_HOSTNAME=no" in the ifcfg file for
the connection in /etc/sysconfig/network-scripts/

/etc/NetworkManager/system-connections is an empty folder so I went
ahead and added "DHCP_SEND_HOSTNAME=no" to

(a WIFI connection)

unfortunately I still see my hostname in the DHCP Request packets
I even tried a reboot to see if this change requires a reboot, but no luck.

Is this a bug in a rarely used config option or am I still doing
something wrong?

This turns out to be a bug in the 'ifcfg-rh' config file parsing plugin.
I've fixed it in git upstream, but a temporary workaround would be:


DHCP_SEND_HOSTNAME was only parsed if DHCP_HOSTNAME was also given.


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