Ping private addresses

bon_chan

Hi everyone,

I was reading some information about the ping command and ICMP error messages, and then wanted to try to ping some addresses to get to see those actual messages.

My address is 192.168.0.15/24, and I tried to ping (randomly) 10.0.0.1, and it worked.
I thought that it was a bug, or that it came from my virtual machines.
Then I thought that it came from my proxy app, but it wasn't running

So I randomly tried to ping 172.31.250.15, and it worked again.
I don't get it. Why, since I'm not in the same network.
Do you guys have any idea?

Edit: Could the addresses be routers?

dead_p00l

have you tried doing a traceroute to those addresses?

networker050184

Sounds like these addresses are being used on your network. Is this at home or work?

As dead_p00l pointed out a trace route can give yo some info on where they are located.

bon_chan

Thx for your replies.
I'm doing this at home

When I trace the 172.x address, it goes through several routers of my ISP (into the Toll network maybe).

As for the first address (the 10.x... one), it says Trace complete straight after i typed the command (doesn't even go through my dsl box)
1 1ms <1ms <1ms 10.0.0.1
Trace complete

dead_p00l

Just for giggles I ran a trace to 10.0.0.1 on my network and it traces all the way through my corporate network. This is coming from my home network in the 192.168.23.0/24 range and completing at 10.0.0.1. I know for a fact that we use the 10.0.0.0 range on our internal corporate network so it's routing across my network, across my public interface and through our private structure and resolving.

RTmarc

dead_p00l wrote: »

Just for giggles I ran a trace to 10.0.0.1 on my network and it traces all the way through my corporate network. This is coming from my home network in the 192.168.23.0/24 range and completing at 10.0.0.1. I know for a fact that we use the 10.0.0.0 range on our internal corporate network so it's routing across my network, across my public interface and through our private structure and resolving.

Unless you are connecting to your work through a VPN connection you are not hitting your corporate network. Most likely you are hitting an internal address to your ISP.

fsanyee

Did you check the output of the route print?

dead_p00l

RTmarc wrote: »

Unless you are connecting to your work through a VPN connection you are not hitting your corporate network. Most likely you are hitting an internal address to your ISP.

I may have misspoken. I work for my ISP so to me they're one an the same.

RTmarc

Ahh. That makes more sense.