Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
Question
Monday, February 2, 2015 9:03 PM
Hi all,
So we are running into this issue where some of our engineers need to be able to VPN into the network and remote desktop to our Windows DHCP server to make quick changes. However, since their ethernet interface with their internet IP (handed out by our DHCP Server) has the "DHCP Server" option listed with the internal IP address of the DHCP server, traffic to the DHCP server does not traverse the VPN, but gets sent out to the public IP gateway.
On a linux-based DHCP Server, we could set the "Next Server" option to a different IP, such as the external IP of the DHCP server. That would solve this routing issue on the client machines. However, we would prefer not to move DHCP to a linux machine.
Is there a way to get the " DHCP Server . . . . . . . . . . . : 172.xx.xx.104" line on the dhcp client to be an IP of our choice instead of the internal IP of the Windows DCHP server?
Below is a copy of the network interface options on a DHCP client machine.
Ethernet adapter PUBLIC DHCP:
Connection-specific DNS Suffix . : xxxxxx.com
Description . . . . . . . . . . . : Intel(R) I350 Gigabit Network Connection
Physical Address. . . . . . . . . : xx-xx-xx-xx-xx-xx
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 199.xxx.xxx.48(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.248.0
Lease Obtained. . . . . . . . . . : Monday, February 02, 2015 1:34:32 PM
Lease Expires . . . . . . . . . . : Monday, February 02, 2015 9:34:32 PM
Default Gateway . . . . . . . . . : 199.xxx.xxx.1
DHCP Server . . . . . . . . . . . : 172.xx.xx.104
DNS Servers . . . . . . . . . . . : 68.xx.xx.xx
68.xx.xx.xx
NetBIOS over Tcpip. . . . . . . . : Enabled
All replies (1)
Tuesday, February 3, 2015 8:12 AM ✅Answered
Hi,
According to your description, my understanding is that you want to assign multi DHCP server to the DHCP enabled client.
To my knowledge, “Server IP Address (siaddr)” filed returned in DHCPOFFER and DHCPACK by DHCP server specify the IP address of next server to use in bootstrap(reference RFC and https://www.ietf.org/rfc/rfc2131.txt). And related RFC (http://www.ietf.org/proceedings/48/I-D/dhc-nextserver-02.txt) indicates that it is still TBD code.
Windows DHCP server, we may specify “siaddr” by configuring DHCP option 66, you may take a try.
Besides, you may try to use predefined options on DHCP server( right-click IPv4, select Set Predefined Options, and then click Add).
Best Regards,
Eve Wang
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected].