ping returns a different address before ssh into a device connected to a school network
Currently I have a few Raspberry Pis connected to my university's protected network Uni-PROTECTED. When I am working on my laptop in the same room under the same network, I have no problem sshing into those Pis by using the IP addresses returned from hostname -I, e.g. 100.91.145.6.
I want to work from home but I couldn't ssh since 100.91.145.6 is a private IP address. I have looked around on the internet which told me that I need to config the router. But since the router is managed by the building, I don't have access to it.
A solution I found is:
I tried to ping 100.91.145.6, but it returns a different IP address 169.228.83.196. And here is what arp -a returns after the ping:
b-wrlss-2t-6509-vlan999-gw.ucsd.edu (169.228.184.1) at 0:21:56:4a:38:0 on en0 permanent [ethernet]
? (224.0.0.251) at 1:0:5e:0:0:fb on en0 ifscope permanent [ethernet]
? (239.255.255.250) at 1:0:5e:7f:ff:fa on en0 ifscope permanent [ethernet]I can successfully ssh through 169.228.83.196 but now I am very confused by the three IP addresses. I am certain that 100.91.145.6 does not work with ssh because it is a private IP, but why pinging it returns a different one, and what is 169.228.145.6?
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