I have 4 usable static ip’s (.51-.54) from Spectrum via a Cisco DPQ3925 modem and have the ip’s statically programmed to 4 different hosts attached to the built in switch. Network .51 has a linksys LRT224 router and a private network behind it. Network .52 has a Meraki router and a private network behind it. Network .53 has a Nethserver box with a private network behind it. Network .54 has my credit card machine on it and is standalone so I can pass PCI compliance.
Periodically ip’s .51 and .53 quit responding to pings and subsequently I can’t connect to those hosts from the internet. I can get on the networks behind those hosts and ping, tracert, etc to the Internet without an issue. The hosts on ip’s .52 and .54 don’t seem to have any ping issues from the internet when .51 and .53 aren’t responding. I thought that the built in switch was the issue so I moved all 4 hosts to an external switch with a jumper to the modem. Everything seems to work ok both inbound and outbound for about 6 hours and then I started having issues with networks .51 and .53 again.
Does anyone have any idea why 2 out of 4 ip’s might be going “dead” from the internet? Dealing with Spectrum tech support is a pain and past experience has shown that one needs to have their ducks in a row with plenty of supporting data before they think it’s their issue.
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