How do I find which device attempt using the port 25

asked 2025-05-04 11:38:27 +0000

danbreeker gravatar image

Hi,

I'm facing a problem as a device on my network attempts to use the port 25, which is blocked by my operator. As soon as it tries, it blocks my internet connection and I have to call the operator to unlock it.

How can I monitor the attempts on this port?

Thanks for your help,

Dan

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Can you login into the router a.k.a. "modem" provided by your ISP and configure the firewall to block port 25?
Then the log file should show the IP-address trying to use this port, and prevents attempts seen by the ISP.

André gravatar imageAndré ( 2025-05-04 18:35:02 +0000 )edit
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