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Tutorials and FAQs / Re: Tutorial 2024/02: HAProxy + Let's Encrypt Wildcard Certificates + 100% A+ Rating
« on: Today at 09:18:57 am »
I found it: I had traffic shaping activated.
Once I disabled that, everything works as expected. I still do not get why this happens only with traffic originating from the OpnSense machine itself, but whatever. If others are experiencing this, it might be caused by external traffic shaping by your provider which may also explain why it sometimes happens and sometimes not.
I also found that it was indeed HTTP/2 traffic and that enlarging the H2 initial window sizes helps a bit.
Once I disabled that, everything works as expected. I still do not get why this happens only with traffic originating from the OpnSense machine itself, but whatever. If others are experiencing this, it might be caused by external traffic shaping by your provider which may also explain why it sometimes happens and sometimes not.
I also found that it was indeed HTTP/2 traffic and that enlarging the H2 initial window sizes helps a bit.