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Websites cannot be loaded - Wifi problem?

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Hallo,

users did encounter some strange problem where some websites cannot be loaded with their iPad whereas the same sites can be loaded with another device.

First of all, I would like to know if there are any serious problems inside the network.

You find attached a network trace of the router's wifi interface. I see some TCP Retransmission packets but I'm not sure if they indicate some serious problem.

https://drive.google.com/file/d/1UCQN...

My question is: at a first glance is there any indication for some serious wifi issues?

sugar76's avatar
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sugar76
asked 2022-09-19 12:02:55 +0000
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I would say too many Selective Acknowledgement packets. At least for a link between multiple public IP addresses.

hugo.vanderkooij's avatar
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hugo.vanderkooij
answered 2022-09-19 14:14:11 +0000
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Thanks. Could you give me a hint how to identify SACK packets? I searched for "sack" in the trace but I'm not quite sure how to identify those packets.

sugar76's avatar sugar76 (2022-09-21 08:47:48 +0000) edit
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tcp.options.sack

BigFatCat's avatar BigFatCat (2022-09-25 06:31:10 +0000) edit
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