CPUG: The Check Point User Group

Resources for the Check Point Community, by the Check Point Community.

First, I hope you're all well and staying safe.
Second, I want to give a "heads up" that you should see more activity here shortly, and maybe a few cosmetic changes.
I'll post more details to the "Announcements" forum soon, so be on the lookout. -E


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Thread: Firewall blocking without rules

  1. #1
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    Default Firewall blocking without rules

    I have the Application Control enabled.

    Some websites are being blocked, without showing the block message. The webpage only doesn't respond. The https inspection is not enabled.

    I run a fw ctl zdebug drop on the firewall and get a lot of logs "dropped by fwpslglue_chain Reason: PSL Reject: ASPII_MT;"

    I believe that this could be the problem, but how to solve?

  2. #2
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    Default Re: Firewall blocking without rules

    It seems that the problem with the ISP, I made a route to another ISP that we have and the problem gone.

    Maybe some routes inside the ISP.

  3. #3
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    Default Re: Firewall blocking without rules

    If you have application control enabled you should also enable usercheck to present users with a block/click through warning.

  4. #4
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    Default Re: Firewall blocking without rules

    When the ISP is connected via a PPPoE connection you have an MTU issue, more and more websites are setting the DoNotFragment bit in the packets.
    The PPPoE header takes 8 bytes from the 1500 available bytes. So lower your MTU on the Firewalls interfaces and you should be ok.
    Regards, Maarten.
    Triple MDS on R77.30, MDS on R80.10, VSX, GAIA.

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