Is pfSense DHCP Server NON RFC Compliant
I have a Mikrotik CSS326-24G-2S+RM switch, and I had an issue where the DHCP leases were not getting through. I disabled DHCP things on the switch:
Namely I disabled the add information option on the switch:
To get clients to get DHCP requests through the switch.
I contacted Mikrotik, and asked them what the deal was. They focused on another issue I was having, being that the switch itself could not get a DHCP address.
I asked them close to 11 months later if there was a fix, and this is their response:
We have attempted to fix pfSense DHCP server issue in SwOS v2.8: *) make DHCP client work with RFC non compliant DHCP servers But we would recommend upgrading to the latest SwOS v2.9 which contains even more fixes regarding DHCP.
I asked them again what they found and:
The change makes SwOS DHCP Client to also accept DHCP offers with set dst. address (non broadcast one).
I did not read the DHCP RFC, but does any of this make it sound like pfSense is DHCP RFC non compliant?
Gertjan last edited by Gertjan
Well ..... where to start ?
What about : did you check 'who' it is ?
[2.4.4-RELEASE][email@example.com]/root: /usr/local/sbin/dhcpd -v Internet Systems Consortium DHCP Server 4.3.6-P1 Copyright 2004-2018 Internet Systems Consortium. All rights reserved ......
So, there you have it :
Bring " Internet Systems Consortium DHCP Server " to the net and you find out who makes it.
Changes are good that "Microtick" itself uses exactly the same software.
Another way to resolute your issue : take that box labelled "Microtick" out of your network and you wind up having a network that will give an IP (DNS Gateway, what ever you want) to any device on planet earth.
@Gertjan Right, and that is what I thought.
I just noticed that they wrote that, and I know they are not giving me the right answer.
Is that switch the ones that has ANY for all vlans? Dude save yourself a whole lot of pain and just go get real switch...
With all respect, I asked a question, and it was answered. All I want to know is if MikroTik support was bullsh*ting me. They are, and I figured this. Not in my wildest dreams would I think that (considering the software set that pfSense uses), that pfSense would not have an RFC complaint DHCP server, but I wanted to ask the experts.
I have no issue, but I wanted to confirm what I was hearing was not the truth.
Over the last two years MikroTik has been very good to me, and I challenge you to find a switch with 10gb SFP+ at the price-point these things come in at.
For the record, VLANing works 100%, and they have quite a few features I like. They are missing some things that I would use in different scenerious, but for what they are, I am good.
The switch that I am using is a CSS varient, so limited control of just the switch, but they sell CRS versions that are pretty heavy handed, and you can switch to the RouterOS, and SwitchOS.
I wish they would opensource both, I think it would be a win for all.
Like I said though, I can't beat the SFP+ stuff, and I mainly use these in places where I need that 10gbit run. I just grabbed their CRS305-1G-4S+IN 4x SFP+ switch for the 10gbit stuff too.
Amazon lists after market SFP+ adapters too that work great too: https://www.amazon.com/gp/product/B01LYW5F11/
I do not have a heavy handed budget for this stuff, and if I did, I would grab something that may be a bit better, but so far so good.
KOM last edited by
Over the last two years MikroTik has been very good to me
For what it's worth, I also use Mikrotik at home, and our ISP uses them for their business customers. At my company, I have pfSense connecting my LAN to my ISP's Mikrotik. While I've been satisfied with the hardware and RouterOS, I'm a little disappointed that their support is not being straight-forward with you.