LAN problem



  • This is a weird one that I have been living with for a while…

    I'm running an IPSEC tunnel between 2 offices.  The remote office will call saying that they cannot access anything LAN or WAN.  The IPSEC tunnel is down, so I have to PPTP to the pfsense box in the remote office.  From the pfsense box at the remote office, I cannot ping anything on the LAN and the activity on the traffic graph is flatline.  The WAN however, is fine.  I'll check the LAN setup out, and everything looks okay.

    I will then disable IPSEC, restart the dhcpd and dnsmasq services, and have someone at the remote office physically recycle the power on a 24 port self-managed Lynksys switch that is connected to the LAN port of the pfsense box.  Usually within a minute or 2 I can then ping the local network devices (in the remote office), see activity on the LAN side of the traffic graph, and everything returns to 'normal'.  I can then re-enable IPSEC and the tunnel.

    Is there a problem with the Lynksys switch?  As far as I can tell, there is only 1 DHCP server on the network.  But if there was more than 1, how can I tell?

    I've been racking my brain to fix this, but I'm running out of ideas.  Any help would be appreciated, especially if I can avoid any calls at 6AM!



  • ???
    Hello? Anyone?



  • Hi ;)

    Version of pfSense? Hardware in use?

    As for spotting other DHCP servers, the clients will list the DHCP server they used.  If that IP isn't one assigned to your pfSense host then that may be your problem.  From your description however it is most probably a bad switch.


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