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Can anyone explain why when I ping 192.168.23.019 it gives me a reply from 192.168.23.17?

Then If I ping .23.19 I get a request timed out reply. But I can RDP onto .23.19 These are virtual machines.. Does that make a difference?

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What is OS you're running ping on? –  poige May 4 '12 at 10:02
    
Windows. Thanks Poige - Never even thought of octal numbering. –  Axle May 4 '12 at 11:09

3 Answers 3

up vote 7 down vote accepted

As poige hints, 019 is a messed up octal way to say 17. 010 = 8, add 9 to that you get 17.

So when you ping .019, you accidentally ping .17

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Thanks you very Much –  Axle May 4 '12 at 11:08
    
@Axle, Actually, it's not just messed but rather totally weird. iputils' (GNU/Linux) ping won't even ping such host with error diag: unknown host 192.168.23.019. That's why I asked you bout OS you've noticed this on. –  poige May 4 '12 at 12:14

ping 192.168.23.019 is incorrect, I suspect, since 0nn means octal number and 9 isn't octal allowed.

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Thanks you very Much –  Axle May 4 '12 at 11:08

Most probably .23.19 doesn't respond to ping, so it just drops the packets, that would explain the timeout and why you can RDP to it.

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Thanks. Would this be a firewall stopping it? –  Axle May 4 '12 at 11:01
    
Most probable... –  Silviu May 4 '12 at 12:16

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