Odd ping result on network

Question

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?

Sirch · Accepted Answer · 2012-05-04 10:10:31Z

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

answered May 4 '12 at 10:10

Sirch
1,628315

	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

poige · Answer 2 · 2012-05-04 09:59:30Z

up vote 3 down vote

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

answered May 4 '12 at 9:59

poige
4,3561418

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

Silviu · Answer 3 · 2012-05-04 09:59:41Z

up vote 0 down vote

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.

answered May 4 '12 at 9:59

Silviu
357310

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

3 Answers