Spam blocking with sender_access in postfix itself.

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This is kinda a pet peeve with me.  I hate spam.  I have my own email servers hosted locally at my shop because I dislike other entities contacting me without my explicit permission.  If I suddenly get spam from some entity I want to ensure I have full control to block everything from their domain.  That is what I thought I had done and it seemed to work for some time, however, I started getting spam from several entities that I thought I had blocked, and after checking found that I had blocked them. I went looking for answers and found the answers were in the details.  I read posts pretty fast and sometimes just exclude them from the solution due to how little detail or how much detail they…
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SSH Disconnects (continued, yet again), and other disconnecting services.

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This has been an ongoing for some time and various things have been done in an attempt to resolve it.  Much of that consisted of swapping out cables and switches, testing hardware, doing a test install, and disconnecting VLAN segments,  I also bought an inexpensive replacement cable modem just in case thinking that it may be the issue.   I didn't test that as I hadn't eliminated the pfsense setup as the cause, nor for that matter any of it except some specific hardware such as switches and cables.  All told, I had swapped out multiple cables and switches, some a couple of times.  After eliminating those I put everything back to the way it was and went onto the next step. At times I thought I had narrowed it…
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