How to assign Domain Controller to VLAN Systems

[slkamath]

Hi,

Myself Lokesh Kamath.

We have below mentioned configuration with 8 Network Ports.

1. WAN - 203.xxx.xxx.xxx
2. LAN - 192.168.20.1
3. Fin-VLAN - 192.1968.30.1
4. Marketing-VLAN - 192.168.40.1
5. Purchase-VLAN - 192.168.50.1
6. Toolroom-VLAN - 192.168.60.1

In the above configuration Domain Controller with Active Directory in LAN.
Primary DC 1 - 192.168.20.100
Secondary DC 2- 192.168.20.102

Apart from DC there are 2 software's running in DC1 (Tally & Salary Soft - Finance Software)

Windows Systems are there in Fin-VLAN & Toolroom-VLAN

How can give LAN-DC 1 & 2 access to Fin-VLAN & Toolroom-VLAN. Also that software's to Fin-VLAN?

Tally work on Port # 9000 & 9999
Salary Soft Don't know the port #

I tried below configuration.

I have created DC 1 & DC 2 alias.

In Fin-VLAN firewall rules i set any source from Fin-VLAN any port to Destination DC1 & DC2 to any port. This is not working (I may be wrong in creating rules).

So please guide me.

Thanks in advance

Lokesh Kamath

[KOM]

It sounds like you had it mostly right, but perhaps you made an error when creating your rules. Try again, and if it doesn't work then post a screenshot of your VLAN rules.

[slkamath]

@kom
Thanks for your response.

I tried that but no luck.

Firewall Fin-VLAN Rules

Fin-VLAN Edit

Firewall LAN Rules

Lokesh Kamath

[KOM]

What is this Finance network? I thought it was Fin-VLAN? Try changing it to 'any'. Are your domain controllers in any of those aliases for sure?

[johnpoz]

Why are you blocking rfc1918 and bogon on lan side interfaces? With rfc1918 blocked your not going to be able to talk to any vlans no matter what rules you put on the interfaces.

[slkamath]

@johnpoz @KOM

Thanks for your response.

@KOM Finance Network means - Fin-VLAN. Domain Controller, Backup Server, Network Printer, Network Shared Server, File Server all these System IP's are there in the Alias.

@johnpoz - I will remove that block and I will check.

Also I created Gateway for all the VLANS apart from WAN Gateway. Giving Gateway for all - Is this correct?

WAN Gateway - 203.xxx.xxx.xxx
LAN Gateway - 192.168.10.1
Fin-VLAN-Gateway - 192.168.20.1
Marketing-VLAN-Gateway - 192.168.40.1
Purchase-VLAN-Gateway - 192.168.50.1
Toolroom-VLAN-Gateway - 192.168.60.1

Lokesh Kamath

[johnpoz]

@slkamath said in How to assign Domain Controller to VLAN Systems:

Also I created Gateway for all the VLANS apart from WAN Gateway

NO!!!

Your telling pfsense the gateway to get to network xyz is itself?? NO!! there is no gateways setup on pfsense to talk to networks its directly attached too..

Think about it for 2 freaking seconds.. How would 192.168.20 talk to 192.168.40 --- BOTH rfc1918 if you have rule that says hey BLOCK rfc1918 source from talking anywhere..

Rules are evaluated as traffic enters an interface from the network its attached too, first rule to trigger wins, no other rules are evaluated... You have a rule right at the top that says hey your blocked!! No other rules are even looked at.

And where could it EVER be possible to see a bogon as source on your own freaking network? Do you even understand what a bogon is? Why are you blocking it? You do understand rfc1918 is part of bogon ;) Pfsense pulls it out of the bogon table - but it is by definition a bogon. So You have 2 rules that state - HEY.. 192.168.x.x - your Blocked... So from those rules NOTHING would work, you couldn't even ask pfsense for dns with those rules.

[slkamath]

@johnpoz
Thank You Very Much.

I removed the RFC1918 and also I removed all the Gateway for VLAN.

Thank you so much. Now VLAN is talking with LAN.

Every now & then they need to disconnect network & re-connect then only mails or shared server is working. Is that any rules issue?

For that purpose i hive given access to all the Mails port (143, 993, 110, 465, 25, 995)

Marketing-VLAN

Purchase-VLAN

Fin-VLAN is working apart Finance Software Tally. It says The Tally Server is not in the same Gateway

Tally Server is in LAN. Tally Users are in Fin-VLAN

Tally Server IP - 192.168.10.100 (ODBC Server port 9000, Tally Port 9999)
Fin-VLAN - 192.168.20.50

So any guidance.

Lokesh Kamath

[johnpoz]

You don't seem to understand how rules work. Rules are evaluated TOP down.. First rule to trigger wins and NO OTHER rules are evaluated.

All of those allow rules are pointless because you have that allow purchase net tcp/udp any rule..

And then you have 2 rules below that allow to specific sites?

How would you ever get to the reject rules?

[slkamath]

@johnpoz
Thank you very much.

What i understood was it will check 1st rule if it is not matching will go to 2nd like that so on. If the rule is not specified or not matching i thought it will be blocked.

Based on the idea given by you i have did few changes. Please correct me if i am wrong.

Fin-VLAN

Marketing-VLAN

Purchase-VLAN

Quality-VLAN

Allow Specific Sites are the sites of Government Sites which is required for few departments. Due to block of News & Social Media (Squid Guard) few sites will not work so created alias and allowing it (Don't know this is right or wrong).

I thought if the rule is not specified means it will reject directly. No idea how to reject other than that. I think I am having very poor knowledge.

Lokesh Kamath

[johnpoz]

@slkamath said in How to assign Domain Controller to VLAN Systems:

What i understood was it will check 1st rule if it is not matching will go to 2nd like that so on.

Exactly - but what is the point of allowing X, above a rule that allows ALL? And blocking something below a rule that allow ALL will never be evaluated.

And yes there is a default deny that is not shown - so if you run through your rules and its not allowed then it will be blocked.

Your block rules on the end of your quality net are pointless.. They would just be blocked by the default deny if not allowed above. So unless you wanted to specifically log them or reject them vs just deny those rules are pointless.

What option do you have set in that allow to lan net? The gear symbol. That rule makes no sense because it allows all lan net, so what is the point of allowing to a specific lan IP?

[slkamath]

@johnpoz
Thank you very much.

How to put default deny rule (please find the pic below is it correct)?

Again did some changes.

Quality-VLAN

Gear Symbol is for Upload & Download limit set so it shows that symbol. In LAN there are nearly 10 IP's. All VLAN has to access those IP's (Shared Folder, Network Printer, Backup, Domain Controller, Tally).

LAN

Can you suggest any book or something so that i will get some knowledge to make it correct.

Lokesh Kamath

[stephenw10]

I suggest reading this chapter from the pfSense book:
https://www.netgate.com/docs/pfsense/book/firewall/firewall-fundamentals.html

Steve

[slkamath]

@stephenw10
Thank you Stephen.

[johnpoz]

Did you post the wrong pic - your qual ne has the block rfc1918 and bogon again..

Your lan rules everything below your any any is just pointless!! Not sure why this is so difficult to understand..

Imagine a source IP:PORT and DESTIP:PORT and protocol - now run through your rules top to bottom.

You have an ANY ANY rule - any protocol and source any dest.. So when would that rule not trigger and get to the safe_IP rule??

When would something not trigger that any any rule and fall through to your block rules? Your any any allows ANY, so
clearly ports 80 and 443 are part of ANY..

If you don't want IPs getting to 80/443 then those rules go ABOVE your any any rule.. Those will then be blocked and other ports like say 123 would not trigger those rules and be allowed through the any any rule.

[slkamath]

@johnpoz
Thank you Very Much

Sorry for the delay.

I made few changes. Please have a look. Also any mistake please guide me.

LAN - Allow Browsing is only for 5 IP's

LAN-UPDATED

Fin-VLAN

Marketing-VLAN

Quality-VLAN

One more issue that i am facing is
All the VLAN systems need to Disable & Enable the network to Send/Receive Mails or Accessing Shared Folder else share folder or mails will not work. (timeline of 2 to 5 min we need to disable & enable network) Where I need to change this?

Lokesh Kamath

[stephenw10]

Looks like you still have an allow all rule on the Fin-VLAN interface that will catch all traffic before it hits any of the other rules.

Steve

[slkamath]

@stephenw10
Thank you Stephen.

I will change the Fin-VLAN. Thanks. Other VLAN is correct?

Lokeh Kamath

[stephenw10]

Well they don't look immediately wrong. Without knowing exactly what you need to do I can't say more than that.

Steve

[slkamath]

@stephenw10

Thank You Very Much Steve.

One more issue that i am facing is
All the VLAN systems need to Disable & Enable the network to Send/Receive Mails or Accessing Shared Folder else share folder or mails will not work. (timeline of 2 to 5 min we need to disable & enable network) Where I need to change this?

Lokesh Kamath

[stephenw10]

That does not seem like a pfSense setting.

Where are you enabling/disabling that?

Can they still reach websites etc without doing that?

Steve

[slkamath]

@stephenw10
Thank you Steve.

Without enable / Disable they cant use internet, mails, shared folder. In LAN there is no issue.

We are enabling / disabling in Client System Network.

Lokesh Kamath

[johnpoz]

that makes ZERO sense and has zero to do with pfsense.. Is your client getting a different IP, new info like dns, etc.. Pointing to pfsense when it wasn't before, etc.

[stephenw10]

Mmm, I could believe it was a rogue dhcp server setting a bad gateway.

Steve

[slkamath]

@stephenw10
Thank you very much Steve.

I have not mentioned any Gateway in DHCP Server.

Please find the below pictures.

FIN-DHCP

FIN-DNS-GATEWAY

Marketing DHCP

Marketing-DNS-GATEWAY

Purchase-DHCP

Purchase-DNS-GATEWAY

Moulding-DHCP

Moulding-DNS-GATEWAY

Quality_DHCP

Quality-DNS-GATEWAY

Should I Specify Gateway? If Yes pfSense LAN IP is the Gateway right. Also Should I add pfSense LAN IP in Gateway (Routing - Gateway)?

Lokesh Kamath

[slkamath]

@stephenw10
Thank you very much Steve.

I had given Gateway as mentioned below to each VLAN, but not mentioned in Routing - Gateways Please guide me if anything wrong.

Marketing DNS-GATEWAY

Purchase DNS-GATEWAY

Moulding DNS-GATEWAY

Quality DNS-GATEWAY

Lokesh Kamath

[johnpoz]

Dude who told you to put in a gateway - there is ZERO reason to do that. What he stated was there might a ROGUE dhcp server handing out the WRONG info!!

[slkamath]

@johnpoz
Thank you very much John.

I will remove that immediately.

@johnpoz, @stephenw10
I do not have any idea on that. please guide me.

Lokesh Kamath

[johnpoz]

Before you go restarting your machines interfaces when something doesn't work... How about you troubleshoot WHY!!!

Are these machines windows? If so then simple

ipconfig /all

from cmd prompt will give you all the info for networking.. Does it show the proper info, what does it show for your dhcp server?

Can machine ping the box your trying to talk to for smtp? Can it resolve its FQDN? Where is this smtp server in your network? Is it outside your network?

[slkamath]

@johnpoz
Thank you very much

When it is not working
1st I will check in pfSense machine will go to ping and select the VLAN and ping the LAN & Google.
2nd I will check in my machine is it working.
3rd I will tell then to disable & enable the network. Then it will work. Now users understood that everytime it is not working then they only disable & enable.

All these machines are UBUNTU. No Windows.

Regarding SMTP i have not tried pinging from client. But I tried pinging google.com & it is pinging.

SMTP is outside network. It's in BIGROCK.IN

Lokesh Kamath

[stephenw10]

So when one machine is failing check the Connection Information in Network Manager.

A rogue DHCP server is some other device that has DHCP enabled on your network that is handing out leases instead of pfSense. Like a soho router you might be using as an access point for example.

Steve

[slkamath]

@stephenw10
Thank you very much.

Ok. Then we initially had an DHCP with Windows DC. but now I unauthorized it from DHCP (6 months back). may be that is the cause i think. If i can remove that machine from network my issue will be solved.

I will do that tomorrow and I will inform you.

Lokesh Kamath

[johnpoz]

If the boxes are ubuntu.. you can still view the same info just different way. Network Manager would be the gui way.

Very simple test would be traceroute fqdn of smtp server

Where does it fail? Does it even fail to resolve? Does it not get paste hop 1, you should do this test when working - does it take another path when not working, etc. etc.

[slkamath]

@johnpoz
Thank you very much.

Ok. I will Check & update you tomorrow.

Lokesh Kamath

[slkamath]

@johnpoz

I removed the Old Windows DC from the Network but still no luck.

Lokesh Kamath

[johnpoz]

Where did I say anything about the OLD DC? If you want help if figuring out what is wrong your going to have to give us some actually info to work with!!!

Your smtp server is outside - can you not reach it, can you not resolve it?

[slkamath]

@johnpoz
Thank you John.

Sorry.

SMTP Server is resolving no issue with that.

traceroute mail.laxmielectronics.com - Result

Marketing-VLAN

Quality-VLAN

Lokesh Kamath

[stephenw10]

That appears to be going via a completely different route. You don't even a 192.168.1.0/24 subnet on your pfSense firewall.

I suggest that device at 192.168.1.1 is some other rogue gateway device. Do you even have an account with actcorp.in?

Steve

[slkamath]

@stephenw10
Thanks Steve

No We don't have actcorp ISP. I think the user has connected to his own wifi Internet due to it is showing like that.

I am sorry for that. Please excuse me. I will once again post the right details tomorrow.

Our ISP Spectra.

Lokesh Kamath

[johnpoz]

hop 2 in that trace 10.253 at 1700ms ??? WTF?? Yeah no wonder they having problems.. Whatever it is they are doing they are not going through your pfsense.

And a 13ms 1st hop is horrible - and most likely wifi.