DHCP server: how can I guarantee the reserved ip even it's also inside the range

[Tian Tian]

Dear Sir/Madam,
 
I have the ISC-DHCPd and PPTPd running on my Linux
machine. After the PPTP client (Windows PC)
successfully connect to it, I found the
"connection-specific DNS Suffix:" information is not
filled in if I type "ipconfig" on PC's CMD prompt.

===============================================
PPP adapter test:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : WAN
(PPP/SLIP) Interface
        Physical Address. . . . . . . . . :
00-53-45-00-00-00
        Dhcp Enabled. . . . . . . . . . . : No
        IP Address. . . . . . . . . . . . :
20.20.20.12
        Subnet Mask . . . . . . . . . . . :
255.255.255.255
        Default Gateway . . . . . . . . . :
20.20.20.12
===============================================

In order to get the DNS Suffix, my questions are:

1. Is it possible for PPTP client to ask for DHCPINFO
via the PPP interface(s) (for example, ppp0, ppp1,
ppp2, ...)?

2. If the question 1 is YES, do I need to start the
dhcpd listening on ppp interface? how to set the
dhcpd.conf?  how/when to start the dhcpd? is that OK
to run dhcpd as "./dhcpd -cf /var/etc/dhcpd.conf
ppp0"?

Please help! Thanks!

Tian Tian



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