Problems in address distribution in DHCP
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Hey, from what I understand the list of the mac addresses are in pfSense already but without IP in the listings.
He want the IP's that are in the list to get DHCP from one interface, and the IP's that are not in the list from another interface (bridge).
This should work but it is not working 100%. -
@ronron555 said in Problems in address distribution in DHCP:
Hey, from what I understand the list of the mac addresses are in pfSense already but without IP in the listings.
MAC addresses will be listed in the DHCP status page. In there, you can click on the "+" to create a static map to a specific IP address.
I am not aware of any way to force using one DHCP server or another in pfSense. Managed switches can be configured to place a device on a VLAN, based on the MAC, but that's not quite what he wants.
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@jknott Hey the MAC addresses are already in the LAN.
Besides VLAN there are still possible?
Do you know someone who uses the method I use? Maybe you can ask someone to help me -who knows what I'm trying to do? -
@itay1787 said in Problems in address distribution in DHCP:
Hey the MAC addresses are already in the LAN
????
MAC addresses are certainly part of Ethernet frames, but that doesn't do much for you. As I mentioned, there is an easy way to create static mappings. However, I'm still at a loss at what it is you're trying to do. Perhaps if you mentioned the goal, we could advise you on a more suitable method. I really don't understand why you'd need two DHCP servers on a single LAN.
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@jknott My goal is that I can separate the devices by their mac addresses. This pfsense is designed for school and I want to create a separation between the teachers and the students because of this i need lan (teachers) will have different rules and different ip addresses. And I already have all the mac addresses of their devices
And students who had their own ip addresses and rules.
At first I thought of setting up vlans with two wifi networks, but because the way the ap is ordered is not really possible.So I found the method I explained in the first post.
If you have a better way to set it up in pfsense rather than from their devices then it would be great I'm open to suggestions that will help me.Hope you understand what I want to do.
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Well, as I mentioned, if you want different IP address ranges, the static mapping will do exactly that. Once that's done, pfSense can use rules for things like access to the Internet, but cannon control behaviour on the local LAN. The method you describes, as I understand it, is to have two DHCP servers, but having the servers provide IP addresses to one set of MACs, but not the other. Is that correct? If so, then you're taking the hard way of doing what static mappings provide. For example, you could configure static addresses, perhaps for the staff, below .100 and normal DHCP, above .100 for others. Another advantage to using static mappings is you can convert a MAC from regular DHCP to static mapped, by selecting it in the DHCP status and then assigning it an address. Trying to do this by somehow having two DHCP servers, where you'd still have to manually add the MAC address is simply the wrong way to do it.
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@jknott Let's see if I understood you
You say, set static IP mappings to all the mac addresses I have at the moment? And open to everyone else, dhcp standard?I do not remember mentioning it
But one of the things I needed two dhcp is because I had to block a lot of things within the network and limit speed. Can I do this with what you suggest (hopefully I understood you)? -
@itay1787 said in Problems in address distribution in DHCP:
Can I do this with what you suggest (hopefully I understood you)?
Yes. As I mentioned, you will have 2 blocks of IP addresses, those within the normal DHCP pool and those that are static mapped. Since the two cannot overlap, you can set up rules according to which address range. If you go to the filter page, you can filter. The closest I can see for filtering on a block of addresses is the subnet mask part. With that, you would have to place the boundary between the two blocks on a power of 2. For example, if you have a total address space of 512, which you'd need for 300 hosts, then you could use a /24 sub net mask in the filter. However, I haven't tried this myself, so perhaps someone else can advise further. Regardless, no matter how you assign addresses to the different blocks, the method to filter them would be the same.
I can't think of a better way to achieve what you want, given you can't use a 2nd SSID & VLAN on the access point. If you could, this would be a lot easier.
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@jknott What do mean by "filter page"?
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@ronron555 said in Problems in address distribution in DHCP:
@jknott What do mean by "filter page"?
In pfSense, click on Firewall > Rules. It's where you create the rules to filter traffic.
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@itay1787 said in Problems in address distribution in DHCP:
This pfsense is designed for school and I want to create a separation between the teachers and the students because of this i need lan (teachers) will have different rules and different ip addresses.
This done via VLAN... PERIOD!!! If your AP does not support vlans, then get new AP that does.. Or just use different AP for each vlan.. Same goes for switches - you need vlan capable switches unless all of your clients are wireless.
If what you want to do is allow different users to access different internet pages, this can be done with proxy, and or restrictions can be done with captive portal, etc.
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I would do this one of two different ways: 2 separate physical interfaces, or 2 separate virtual interfaces.
Put all teachers on one interface, put all students on the other interface. You can then DHCP and work with the pile of MAC & IP addresses all you want, for each interface. If you want traffic to cross-over from one interface to the other, simply write the proper firewall rules on pfsense.
Do NOT use bridging.
Jeff
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@jknott Hey, after the new changes I made to pfsense on your advice it seems that the problem was gone, everything works great.
There is only one problem - I have to block all "STUDENTS_Network" from "LAN"
Meaning that they would have access only to the Internet and nothing else.
Please look at the picture I attached. -
Where is this students network - I only see lan and admin_vlan
Where is the students vlan?
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@johnpoz There is no vlan. This is alias
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In that configuration any student who wants to can just set a static IP address on the teacher LAN and be on it.
That is implementing almost no security at all. Or, worse, just an illusion of security.
If that is a business requirement, someone is going to have to buy some gear that supports 802.1q. Or duplicate the layer 2 gear for two separate LANs with different router interfaces.
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@derelict We know that VLANs will be much more secure
But as soon as the network is built, it's the thing we found that will work. We may soon be switching AP. And with that happening, we'll make sure they have VLANs and replace everything with VLANs.But right now we have a problem with setting up one of the rules as I said above.
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You can not stop people on network A from talking to other people on network A... The firewall/router is NOT involved in these discussions.
Why do you think we stated the only way to do this is with vlans.
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Because DHCP server is not designed to do that. It is designed to serve the interface subnet scope. You will probably have to use a different DHCP server.
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You can not build a network with junk ;) you need to either isolate your networks at the physical layer with different switches and AP for each network you want. Or you need switches and AP that support vlans - its that simple = PERIOD!