bentole/dhcpproxy

DHCP Proxy For Deleting and Inserting Relayed Option 82

dhcpproxy's Issues

Typo in script along with other changes.

In order for us to get this working we had to do the following.

Changed "not ip broadcast" to "not broadcast" line 26

changed I to i in "relay_agent_Information" line 21.

Run python2 as it will not work with python3

RFE: verbose- or debug-mode/flags

Nothing mind blowing.
I would have wanted to see more logs when running directly from CLI, not as a service. Maybe even what options were being sent/asked for back and forth. Also what "Irrevelant DHCP pkt" actually was.

Mind you, I haven't studied the code yet.

dhcpProxy actually helped us prove that VMware VDI's behind ACI could actually PXE-boot, and that it was not a limitation in VMware BIOS or anywhere else.
We then moved the DHCP options to a proper DHCP-server (Infoblox) and that worked every time. The guys handling SCCM were almost ecstatic.

Support for multiple DHCP servers

dhcpProxy should have support for relaying DHCP packets to multiple upstream DHCP servers. This is neccesary as having multiple DHCP servers is common practice.

I have a half-way functioning prototype of this and will be finishing it in the next few days.

Option aware option inserting

The current set_dhcp_option function does not account for the order of DHCP options.

Option 82 is replaced with FF 00 00 00 by edge switches in Cisco SD access. It seems like client machines consider the FF as option 255 (END) and drops the packet.

def set_dhcp_option(pkt, option_key, new_value):                                                                                                                                                                     
        try:                                                                                                                                                                                                         
                pkt[DHCP].options.insert(0, (option_key, new_value))                                                                                                                                                 
                return "success"