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Apache Not Accepting More Than 50 or so Concurrent Connections

cn flag

I'm sure I'm missing something simple, but 2 Windows servers (2016) and a Linux server (Ubuntu 20.x) have pretty much the basic Apache 2.4 installed. Works great.

However, the devices that talk to the web server (they are IP telephones) when rebooted, talk to the server and work fine. However, if I reboot more then 50 phones, Apache seems to be fine with the first 50 that hit it, but the others are ignored. The phones are all loading the exact same page/file. So I'm wondering if there is some default DoS type restriction in place that I can't find, or if maybe I need to install the evasive mod to open up Apache to allow a mass hit on the same page/file. I'm currently using the event mpm. Didn't think that would be the restriction as Windows uses the winnt mpm. I did play with the mpm event conf directives but regardless of what changes I make I always get max of 50 devices that get the data they need from Apache.

New to the Apache server but seems reasonably straight forward, so I'm guessing it is something I have overlooked.

Any thoughts greatly appreciated.

yagmoth555 avatar
cn flag
Hi, your html log say what ? I more wonder if it's not a DoS from your switch side, thus the log would not show those requests if so.
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