on the 'send public key' idea:
> The UDP packet is limited to 576 bytes, unless the client indicates that it
> can accept larger. 312 bytes are allowed for the variable option part - but
> don't forget that each option value is preceded by a byte for option code and
> a byte for option length - eg a 4 byte option would take 6 bytes the packet.
>
> There is also a facility to redefine the server and file fields as option
> space, this gives an extra 192 bytes for options.
That is getting tight, so I would hold off till someone really wants it.
Steven Shiau wrote:
> Carl, Thanks for sharing this info with us. I suggest that you can put
> another service in /etc/ocs/ocs-live.d e.g.
> /etc/ocs/ocs-live.d/S07pre-run-dhcp
>
> You can refer to the existing /etc/ocs/ocs-live.d/S06pre-run to write that.
Thanks
>
> If you make it, please share that with everything again. Thanks.
Of course :)
Carl K
>
> Steven.
>
> Carl Karsten wrote:
>>> would it be possible to set ocs_daemonon="ssh" and usercrypted via dhcp
>>> parameters?
>>>
>>>
>>
>> Here is how to get the parameters from the server to the client. All that
>> remains is for the code that currently for boot parameters to look here
>> too. If you will direct me to that code, I will propose something.
>>
>> btw - my personal goal is to be able to use this to fix a hijacked box.
>> But it will fit in nicely with Clonezilla: put unmodified Clonezilla CD in
>> box, boot, ssh in from 2nd box, run clonezilla. Which I currently can do
>> with PXE, but it would be nice for those that do not have that setup and
>> just want to boot/run from a physical CD.
>>
>> ######################################### # /etc/dhcp3/dhcpd.conf option
>> cz_ocs_daemonon code 224 = string; option cz_usercrypted code 225 = string;
>>
>>
>> subnet 192.168.1.0 netmask 255.255.255.0 { range 192.168.1.10
>> 192.168.1.254 ; option cz_ocs_daemonon "ssh"; option cz_usercrypted
>> "iTBGwkbHzKDfk"; } ######################################### #
>> /etc/dhcp3/dhclient.conf # Configuration file for /sbin/dhclient, which is
>> included in Debian's # dhcp3-client package.
>>
>> option cz_ocs_daemonon code 224 = string; option cz_usercrypted code 225 =
>> string;
>>
>> request cz_ocs_daemonon, cz_usercrypted, subnet-mask, ... ;
>>
>> ######################################### After a dhclient gets an IP...
>>
>> ju...@dell30:~$ grep cz /var/lib/dhcp3/dhclient.leases option
>> cz_ocs_daemonon "ssh"; option cz_usercrypted "iTBGwkbHzKDfk";
>>
>> ######################################### #
>> /etc/dhcp3/dhclient-exit-hooks.d/debug # writes out parameters to temp file
>> for i in ....new_cz_ocs_daemonon new_cz_usercrypted echo $i=\'${!i}\' >>
>> /tmp/dhclient-script.debug ############# ju...@dell30:~$ grep cz
>> /tmp/dhclient-script.debug new_cz_ocs_daemonon='ssh'
>> new_cz_usercrypted='iTBGwkbHzKDfk'
>> #########################################
>>
>> Carl K
>>
>> ------------------------------------------------------------------------------
>>
>>
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>>
>
>
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