Need help setting up VLAN [SOLVED]



  • Thanks to both Jahntassa and Clarknova, I have successfully setup my network with just a smart swtch and a laptop.

    Also, thanks to all who contributed/participated on this discussion.



  • Hi, I am back again….

    With instructions/help I received from members in this forum, especially clarknova and Jahntassa, I managed to configure my Netgear GS108T switch to use with the built-in nic on my laptop and was able to pull an both a WAN and LAP ip and then assumed everything was ok. But then I got busy wih production issues at work and could not really verify that everything was working as it should. Now that I have some time to devote towards this project again, here is my issue.

    The following screen shots are from my switch followed by the screen shots from pfSense. As you can see, my pc can indeed get a lan ip from dhcp and the wan gets an ip from FIOS too. But unfortunately, I cannot browse the internet from my pc. From reading the posts on this forum with similar config(s), seems I have everything in place already. What else am I missing?

    I have attached the screenshots from my config to help figure out what else needs to be done…I am hoping I missed a small step in my settings. Can you guys help? Thanks!

    One more piece of information. My pfsense laptop is connected to port 1, FIOS to port 2 and pc to port 3 of my smart switch.

    ???
















  • Everything in the screenshots appears correct to me. Perhaps there is a problem in your firewall rules or NAT config. Can you ping internet sites from pfsense and get a response? Can you ping a LAN host? Do you have a "Pass from all to all" rule on the LAN? Is Advanced Outbound NAT disabled?



  • Here are my answers and some more screenshots.

    • No I cannot ping any internet sites from the pfsense web interface
    • The default pass for all rule on the LAN is still active
    • Advanced outbound NAT is disabled.

    Interestingly, pfsense firewall log screen is completely empty as if no traffic is passing through the firewall.










  • The only other detail I omitted here is that I need to spoof the MAC address of my WAN side because FIOS expects it. Without it, I couldn't even pull the WAN ip. But I thought this is no big deal since I can actually establish a WAN connection, just no internet access.  ;)



  • Everything you posted looks in order to me. Can you get a ping response from your WAN gateway? From the DNS servers? Immediately after pinging these try this on the console:

    
    arp -an -i em0_vlan10
    
    

    The above assumes that your WAN interface is named em0_vlan10, which it would be in 2.0beta, but it might be different in 1.2.3.

    Interestingly, pfsense firewall log screen is completely empty as if no traffic is passing through the firewall.

    Your LAN rule doesn't have logging enabled, so you won't see any logged traffic there. The only firewall logging that is done by default is for the default block rule on the WAN, so unless you disabled that, I would expect to see some blocks in the log after a short time of being connected.



  • Ok, here is what happened.

    • No ping response from the WAN gateway. 100% packet loss.
    • No ping response from DNS servers. 100% packet loss.
    • arp -an -i -em0_vlan10 yields:

    ? (173.57.84.1) at (incomplete) on em0_vlan10 expires in 19 seconds [vlan]
    ? (68.238.96.12) at (incomplete) on em0_vlan10 expired [vlan]
    ? (68.238.64.12) at (incomplete) on em0_vlan10 expired [vlan]
    ? (173.57.84.60) at <obfuscated wan="" mac="">on em0_vlan10 permanent [vlan]</obfuscated>



  • You're getting no arp resolution on the WAN, and yet you have an IP address. I don't think dhcp will work without arp resolution, so unless I'm wrong, you had it long enough to get an address, and then you lost it.

    Are you able to get internet access from the FIOS using any other device, like a computer connected directly instead of pfsense?

    You may also need to stop blocking bogons on the WAN. I seem to recall reading on dslreports that some FIOS users had bogon-listed addresses upstream of them.



  • Hmmm….That may be so but pfsense installed on the dual core power hungry pc I am trying to replace with the laptop and a smart switch works just fine with my FIOS connection. I just have the issue I have outlined here on the smart switch and laptop.

    Also, the aforementioned dual core pc works just fine with the "block bogon networks" setting checked so it has to be specific to the new config. So, if you have any other suggestions, I am willing to try those out too.



  • I would suggest trying the following.

    1. Copy the config from the working pfsense to the laptop pfsense. You will have to manually change the vlan and interface information to reflect the difference in hardware.

    2. Double-check the MAC address info on the WAN to make sure that you are using a valid MAC.

    3. On the pfsense shell do 'tcpdump -i em0_vlan10 -n' and watch packets come and go on the WAN to see what is working and what isn't. Try renewing the dhcp lease while doing this, ping the gateway, etc. Paste the output here if you want us to have a look at it.



  • Hi, finally got a chance to try the shell command you mentioned above…...with interesting results!

    With the command running in the shell constantly capturing and logging packets, I get internet access. With it not running, back to no traffic with the same symptoms as described in my previous posts e.g. not being able to ping DNS server from WAN interface etc. Somehow just logging the traffic on the shell with the command somehow fixes the issue. Does that tell you guys anything at all about what the issue might be?

    I am not sure how to copy the output of the command since I am running it in the shell. If you could tell me a few steps about copying the output and pasting it here, I could do that.

    I suppose I don't have any issues running the tcpdump command running in the shell indefinitely if there would be no adverse effects but would really like to solve it if possible.



  • Interesting. Maybe your NIC just needs more attention.

    You can copy from the shell by accessing the shell via ssh (putty if you're in Windows). You'll have to enable the ssh server in pfsense first.



  • Could you try removing Port 2 from VLAN 1?



  • To dreamslacker:

    I am not sure how. Do you mean on vlan membership mark port 2 as U, T or blank?

    To clarknova:

    Any specific sections or output of tcpdump -i vlan0 -n for anything specific? I have pasted a small sample below.

    04:43:56.833417 IP 173.57.84.60.28747 > 208.83.244.123.1194: UDP, length 49
    04:43:56.837783 IP 208.83.244.123.1194 > 173.57.84.60.28747: UDP, length 49
    04:43:59.802912 IP 173.57.84.60.21579 > 208.83.244.21.123: NTPv4, Client, length 48
    04:43:59.857742 IP 208.83.244.21.123 > 173.57.84.60.21579: NTPv4, Server, length 48
    04:44:00.765513 IP 173.57.84.60.32769 > 192.168.0.100.57920: UDP, length 32
    04:44:00.766951 IP 173.57.84.60.32769 > 192.168.0.100.57920: UDP, length 32
    04:44:01.373543 IP 173.57.84.60.24484 > 67.18.187.111.123: NTPv4, Client, length 48
    04:44:01.380244 IP 67.18.187.111.123 > 173.57.84.60.24484: NTPv4, Server, length 48



  • @hmishra:

    To dreamslacker:

    I am not sure how. Do you mean on vlan membership mark port 2 as U, T or blank?

    Mark vlan 1 membership for port 2 as blank.



  • I did but it did not work. Screenshot attached. Just ignore the pot 8 marked as U. I have tried it all blanks for Port 2 - 8, U for 1 - 8, Port 1 T and rest U, Port 1 T and rest blanks etc. and few other combinations to no avail. For vlan1, the switch does not allow me to make port 1 as blank but I have tried with both T and U.




  • I meant blanking ONLY port 2.



  • So, you meant blanking port 2 but leave the rest 1 and 3-8 as T or U? I suppose I can try both.

    I am pretty sure I have done this combination as well but I will verify again. After doing this, does each step require a reboot or restart of the laptop or switch or the pc accessing it?



  • If you're just making changes on the switch then no need to reboot anything. The changes will be effected as soon as you hit the Apply or Save button (within a few seconds, anyway). In some cases you may need to reconfigure the interfaces on the connected hosts, like renewing an IP address.



  • On second thoughts, blank both ports 1 & 2 on VLAN 1 ONLY and leave the rest as Untagged.
    No reboot is required on the switch, if it needs to, it will notify you and power cycle on its own.



  • The switch does not allow me to blank Port 1. I get a message "Can't remove port 1 from this vlan, its PVID not changed". The only allowed setting for port 1 is either U or T. The rest don't matter and I could have them blank, U or T.



  • You can't black port 1 from vlan 1 because the PVID of that port is set to 1. Change the pvid to 10 or 20, then you will be able to blank it.



  • Ok, tried that too. As before, it simply does not work without running the tcpdump command in the shell.



  • Now that I have experimented quite a bit with setting up VLAN capable switch to work with Thinkpad R61i, my question is, is this a laptop issue or switch issue?



  • That sounds like a good question for cmb.

    I guess a person could always try a different switch or different laptop to find out.



  • Hmmm…...I would try with another switch if I had one.

    But I do have another laptop which I suppose I can try running off of Live CD instead of installing it although I am not sure if my vlan/config changes will be carried over after a reboot without installing the firewall i
    in the HDD.  :-\



  • You an experiment with the LiveCD until you find a setting that actually works out.  Dump the config into XML and then head over the laptop and use the menu to install to HDD.  It should retain all the configuration settings for the install.  If not, simply restore the XML file for the HDD install.

    IMO, the problem might be a configuration issue on the switch.  Then again, we won't quite know for sure until we see how the switch configuration looks like now.



  • Finally!!! It worked. In fact I am typing this reply on the new VLAN connection. ;D

    Apparently, just spoofing the MAC address on WAN interface with VLANs does not work. At least, in my case.

    I had to manually change the em0, vla0 and vlan1 MAC address(s) to match the spoofed one after which it chugged along happily. So, nothing was wrong with the switch or laptop, just a case of non-spoofed MAC.



  • I would like to Thank All who replied/helped in this thread. Especially clarknova with the detailed example on setting up the VLANs on a Netgear switch. I setup the switch as clarknova explained and then pfsense on initial install[took me a few tries, but figured it out]. Also the last post by OP helped me finally getting working. I'm on comcast, needed the WAN[vlan0 in my case] to spoof the Real NIC's MAC address. After that all was working great, much better than my old WRT54GL running tomato. Now all I need is to setup the wireless part. Hopefully I can find a detailed thread like this one for the wireless part.

    EDIT: For the record I'm running pfSense on a Thinkpad T23 with 1GB of ram and the Netgear GS108T switch.

    THANKS AGAIN ALL! :)


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