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Joined 3 years ago
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Cake day: November 14th, 2023

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  • I’ve done it successfully for two Tripplite 1500va and two APC 750va UPS’s. They’ve been running for over 4 years now.

    I bought a lifepo4 that specifically said it had a lead acid drop in replacement BMS (battery management system).

    The only problem I have had was when I had a two day power outage. After running to complete drain ( and they lasted over 2x longer than my older lead acid), the Trupplites wouldn’t charge up after power was restored. I had to pull the batteries and charge them outside the ups to get everything working again.

    Under normal use they have worked great.

    Lifepo4 works fantastic as a drop in because the peak charge of lead acid is only 80% charge of lifepo4. This means that while you don’t get full capacity out of the lifepo4, it never fully charges which dramatically increases the lifepo4 lifespan.













  • I’ll try an analogy to explain better. The firewall is a lock on the door to your house. Vlans are a rule that to go from one room to another, you must go back out the locked door and back in.

    So an attacker tries to come in and can’t pick the lock. You are safe.

    Another attacker can pick the lock and get into a room. But if they can pick the lock for one room, they can pick the same lock again and get into any other rooms because it’s the same lock protecting every room in the house.


  • if you allowed that to happen you either did not set firewall rules strict enough

    The argument was that the vlans force a device through the firewall so that the firewall can protect it. But for that to happen, like you said the firewall wasn’t strick enough or didn’t have a defense against a 0 day.

    So the vlan doesn’t do anything either way. Either the firewall works in which case you don’t need vlans to force local traffic through them a second time or they don’t work in which case again the vlan did nothing.