On the Overview tab, under Network Infrastructure, DNS/Gateway/DHCP: 10.0.0.1, I get two messages for each of ports 465, 993, and 995. I don't know what they mean or what, if anything, should be done about them:

"Failed to establish secure connection [Step 0] Socket Error # 10054 Connection reset by peer. [Step 1] Socket Error # 10054 Connection reset by peer. [Step 2] Socket Error # 10054 Connection reset by peer. [Step 3] Socket Error # 10054 Connection reset by peer. [Step 4] Socket Error # 10054 Connection reset by peer."
"Error by lookup value 'No Secure Protocol Available' in Security Rating"

Article Comments

Dear Rick

When the sensor tries to connect, it uses the most secure connection protocol available. If no connection is possible, the next best protocol is used. The error message shows that none of the supported protocols (via TLS, SSL) were accepted by the device.


Sep, 2016 - Permalink

Thanks. What would cause this problem?


Sep, 2016 - Permalink

Since the TCP connection was actively closed ("Socket Error # 10054 Connection reset by peer") it looks like being caused by the firewall configuration, the wrong ports used, or possibly flood protection.


Sep, 2016 - Permalink

Thanks. Is this something that should be fixed? If so, how?


Sep, 2016 - Permalink

If you want to monitor those DHCP ports, they must be open and the firewall must allow PRTG to access them. If you don't need these ports monitored, you can delete or pause the sensors in question.


Sep, 2016 - Permalink

Thanks!


Sep, 2016 - Permalink

I'm still having trouble with this. I'm over my head, but I'm hoping you can help. I checked Inbound Rules in Windows Firewall and all four PRTG listings show "Any" under both Local Port and Remote Port. What else should I check? Thanks.


Sep, 2016 - Permalink

Dear Rick

In this case please check the log of the DHCP if you can find any connection related messages. For example it could be the case that a flood protection applies.


Sep, 2016 - Permalink

Thanks. Where do I find the log of the DHCP?


Sep, 2016 - Permalink

Dear Rick

This depends. Please contact the admin responsible for this DHCP server.


Sep, 2016 - Permalink

I don't have an admin or a server. This is a home network with a WiFi router.


Sep, 2016 - Permalink

Dear Rick

In this case, I don't think this sensor provides useful information unless there is a reason to specifically monitor these ports.


Sep, 2016 - Permalink