[Webkit-unassigned] [Bug 278790] New: Hosting Misconfiguration on webkit.org

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=278790

            Bug ID: 278790
           Summary: Hosting Misconfiguration on webkit.org
           Product: WebKit
           Version: Safari 18
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Website
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: zamadatix at gmail.com
                CC: jond at apple.com

Hello all,

webkit.org and associated sites on the same hosting (e.g. browserbench.org) have a dual part configuration resulting in connectivity issues for some clients configured in a similar manner. The first component is the webserver infrastructure is configured with jumbo frames (i.e. an MTU greater than the standard 1500) on the order of ~8500 bytes causing a TCP MSS of 8373 to be sent back. The second component is the infrastructure filters ICMP. The net result is PMTUD is made unreliable, the connection (with a client also with jumbo frames) can be signalled to use >1500 byte frames, and the connection opens (TCP opening uses small packets which fit under a single 1500 byte packet) but hangs whenever actual page data starts to be sent.

In general, the easiest way is to internet clamped to 1500 but I'm sure your infrastructure/network folks know the full gamut of options to resolve this so I'll leave the report at this for now :).


Thank you,

Daniel Smith

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