Let's say a colo assigns me an IP range 18.104.22.168/26. 22.214.171.124 is the gateway for my usable IP range 126.96.36.199 - 188.8.131.52.
I'm using pfSense firewall and have configured its external interface as 184.108.40.206/26.
I would like to have couple of IPs usable outside of the router/firewall in order to connect a remote console access device and a remote power switch outside of the pfSense appliance for the best chance of recovering from error conditions remotely (including, if necessary, restart of and console access to the pfSense appliance).
I would like to know if it's possible to use, for example, the IPs 220.127.116.11 and 18.104.22.168 of the given IP range outside of the firewall's external interface (split by a switch outside of the firewall's WAN interface), assuming I've configured those two IPs to be blocked in the router?
Would I get collisions? Would this work reliably? If this doesn't work, I'll have to request the smallest available IP segment to be used with the 'external' devices, and not include it in the firewall's configuration.
Thanks for any advice!