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Hey Guys,

Having some trouble with a SonicWall TZ 180 firewall appliance we think is causing some internet slowness.  We're subscribed to a 6 Mbps DSL Internet service.  However we've noticed that we always get about 2 Mbps.  We decided to have a technician come in and take a look.  He was able to get 5.5 Mbps if he connected directly to the modem.

This leads me to believe that the SonicWall device is somehow the cause as it is the only thing between the ISP's modem and our LAN.  I just have a hard time believing that this device can't handle a 6 Mbps connection.  I've attached a few screen shots with some configuration information from the Security Summary screen.




sonicwall1.jpg
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  • Security Summary 1
sonicwall1.jpg

sonicwall2.jpg
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  • Security Summary 2
sonicwall2.jpg

    asked 11/17/2011 04:43

    RyanHartwick's gravatar image

    RyanHartwick ♦♦


    9 Answers:
    Believe it.... I have replaced older routers for this exact same reason.
    link

    answered

    gcoltharp's gravatar image

    gcoltharp

    We do have another TZ 180 hanging around as a backup that basically never been used.  If I swap them would that help, or is it the particular model that would be the issue?
    link

    answered 2011-11-17 at 12:50:36

    RyanHartwick's gravatar image

    RyanHartwick

    The security services can certainly cause this. Have you tried disabling them in addition to removing the checkboxes for each zone? I had this issue with a Pro 2040. We upgraded to 20MB synchronous Internet and the most I can get out of it is about 10MB synchronous. It ended up being the processing speed of the SW appliance.
    link

    answered 2011-11-17 at 12:54:47

    digitap's gravatar image

    digitap

    If they are basically the same unit...it wouldnt help. I replaced an older Linksys firewall with a cheap Zyxel VPN endpoint and my throughput  went from 2Mbs (barely) to 18x2 on a Comcast Cable Business connection
    link

    answered 2011-11-17 at 12:55:06

    gcoltharp's gravatar image

    gcoltharp

    Oh, I should add that we're replacing the Pro with a NSA series which should keep up with the required throughput.
    link

    answered 2011-11-17 at 12:56:17

    digitap's gravatar image

    digitap

    As most of the Security Services are not licensed any more I cannot turn them off or configure them.  The only real option I can find right now is the "Performance" setting I've shown in the second screen shot in my original post.
    link

    answered 2011-11-17 at 12:58:28

    RyanHartwick's gravatar image

    RyanHartwick

    OK. Out of curiosity, when you change between the two options, do you see a response different? On my NSA 2400, you can select the security service option even if it's not enabled within the security services themselves. I've read somewhere that they should be disabled in both places to be free of them.

    I think, in the end, that you're running against a processing limitation of your SW appliance. The model you have is outdated. If you have maintenance still, you might consider upgrading the firmware as much as you can to see if that helps. If not, then it might be time to look into a secure upgrade.
    link

    answered 2011-11-17 at 13:10:56

    digitap's gravatar image

    digitap

    Hey guys after some further research, it appears that the SonicWall device was not the bottleneck, but the ISP connection itself.  The first technician on site actually lied to the client.  However, I appreciate the advice.
    link

    answered 2011-11-17 at 13:23:08

    RyanHartwick's gravatar image

    RyanHartwick

    No real solution to the issue yet, as the problem was not with the SonicWall appliance but with the ISP

    link

    answered 2011-12-02 at 10:52:14

    RyanHartwick's gravatar image

    RyanHartwick

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    Asked: 11/17/2011 04:43

    Seen: 359 times

    Last updated: 12/06/2011 05:18