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Originally Posted by magnesik
Is it possible to filter packets by lenght?
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The only "length" filtration that is possible is the max-mss option of scrub. Please refer to
pf.conf(5)for the description and syntax.
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During uploading files on machine connected to router with firewall listed above by http (port 80), internet on it is frozen. Any other service doesnt work or works very very slowly.
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I'd look to your queuing rules. I've never used HFSC queuing, so I can't comment on your rules, but the symptom you describe is indicative of incorrect traffic shaping.
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I suspect them (huge ACKs) as my problem.
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Don't suspect. Know. Use
tcpdump(8).