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  1. #1
    Master Untangler
    Join Date
    Oct 2010
    Posts
    115

    Default WAN Balancer Breaks Inbound/Outbound Connections

    I submitted a support ticket on this problem a few minutes ago but would be interested if anyone else has encountered problems like this with the WAN Balancer.

    We enabled the Untangle WAN Balancer in our network it was set to balance 50/50 between our ADSL connection and our new fibre connection. Once it was up and running we noticed that intermittently all inbound external connections to the network would stop working. Specifically these connections were incoming emails (via our MX-Record/Public IP address), Outlook Web Access and email connections from our mobile devices. Additionally outgoing internet (website) connectivity also went down intermittently and quite frequently.

    We also noticed that if we enabled the WAN Failover app, a short while after enabling it all internet (outgoing and incoming) connectivity was lost. We disabled this immediately.

    The particular issues we encountered whilst the WAN Balancer was running were as follows:-

    - Connecting externally from outside the network to Outlook Web Access would work for a period of time but then a few minutes later it would not be possible to connect for a couple of hours. Some external staff could connect whereas at the same time other external staff could not connect.
    - Email connections from mobile phones would work for a short period of time but then a few minutes later would not work for a few hours if at all.
    - Incoming external emails would take over 30 minutes to arrive under usual working conditions emails arrive within 2-3 minutes at most.
    - It was not possible to access websites from workstations on the network.
    - We set up a route rule within the WAN Balancer to ensure that all email traffic from our Domain Controller (Exchange server) went out via the WAN interface responsible for external incoming connections but this did not make any difference.

    To verify it was the WAN Balancer causing the problems, we turned off the WAN Balancer. After doing this everything returned to normal working conditions.

  2. #2
    Untangle Junkie dmorris's Avatar
    Join Date
    Nov 2006
    Location
    San Carlos, CA
    Posts
    17,486

    Default

    WAN Balancer/Failover does not effect inbound traffic, so my guess is there is some more fundamental issue, like DNS configuration.
    DNS configuration can be complicated with multiple WANs if the configured DNS servers only answer from one WAN.

    Just a wild guess.

    Next time you cant access websites from workstations I would do this:
    http://wiki.untangle.com/index.php/The_Internet_is_Down
    Attention: Support and help on the Untangle Forums is provided by volunteers and community members like yourself.
    If you need Untangle support please call or email support@untangle.com

  3. #3
    Master Untangler
    Join Date
    Oct 2010
    Posts
    115

    Default

    It did seem highly likely that either the WAN Balancer or WAN Failover were causing the issues - as soon as we turned off the WAN Balancer (the WAN Failover app we had already turned off) normal service was resumed.

    My suspicion is that even though the WAN Failover app had been turned off and removed part of it was still lurking somewhere in the system.

    I'm in dialogue with support now so I'm sure we'll get it sorted.

    Thanks.

  4. #4
    Master Untangler
    Join Date
    Oct 2010
    Posts
    115

    Default

    Since fully removing the WAN Failover app (not just leaving it disabled as that made no difference), we've not had any problems as yet.
    Thanks to Eric in support for his assistance.

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