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Error connecting with SSL. EOF was observed that violates the protocol

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Hello,

When I enable "ProxyProtocol" in Apache2.4, our PRTG SSL Certificate sensor fails with the following: Failed to establish secure connection [Step 0] Error connecting with SSL. EOF was observed that violates the protocol

No other apps, browser nor clientsoftware seem to complain about this change in the Apache config - why does the PRTG fail?

apache eof proxyprotocol

Created on Oct 8, 2018 1:25:59 PM by  thomashm (0) 1



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Hello,

from the doc https://roadrunner2.github.io/mod-proxy-protocol/mod_proxy_protocol.html you are not supposed to connect directly to an Apache port using the proxy_protocol so are your other users connecting to this Apache port or are they (as they should) connecting to Haproxy instead ? And is your prtg sensor connecting to Haproxy too or to the Apache port that should be normally blocked by firewall?

Created on Oct 9, 2018 8:58:27 AM by  gpfr (60) 1 1



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Hi there,

Unfortunately, our knowledge about Proxy Settings in an Apache Webserver is rather restricted. But could you check what gpfr has mentioned?

Best regards.

Created on Oct 9, 2018 10:17:32 AM by  Dariusz Gorka [Paessler Support]



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Hello

Yes, GPFR is right. When using ProxyProtocol one cannot connect to the apache webservice thru anything but the haproxy, so the "error" makes perfect sense. I was wrong about client software not failing, my testing had been improper.

Thanks,

Created on Oct 9, 2018 10:56:07 AM by  thomashm (0) 1



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