Was about to file a report for this.
Can confirm, tested in 16.04
http://pastebin.com/JzexVR0D
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Title:
ping reports wrong IP res
Can confirm - I tested in 15.10 and this bug no longer exists in the
current iputils package, but this should be backported to 14.04 IMHO
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14.04 contains an old version of the bug109709-less-dns.patch patch.
Current versions implement DNS caching without this buggy behavior, so
the best solution would be to refresh the patch.
See the commit history for that file:
http://anonscm.debian.org/cgit/collab-maint/iputils.git/log/debian/patc
Couldn't the upstream fix be to time out the DNS resolution? If you
don't have an answer in X seconds/milliseconds, never mind and carry on.
It's just ping, after all, and it's a good idea to make low level
diagnosis independent of higher level functionality, as noted in the
Debian bug report.
Cac
To follow up on myself (I seem to do that a lot) see
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=109709. The problem
that this patch tries to fix is sort of real (but see below), but the
patch is plain wrong. Yes it fixes that issue, but introduces this new
bug.
Which one is more serious? I
No, don't kick upstream. It's bug109709-less-dns.patch. Revert it, it's
bogus
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Title:
ping reports wrong IP responding under cert
I Noted the nexthop field is wrong as well in my last output.
What happens is a wrong optimisation. the pr_addr function assumes it is
always called with the same address, so it just returns the previous
buffer on subsequent invocations.
The following quickfix fixes both the issue in this ticket
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: iputils (Ubuntu)
Status: New => Confirmed
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The problem even exists on an ICMP redirect.
martijn@garfield:~$ ping 172.22.226.3
PING 172.22.226.3 (172.22.226.3) 56(84) bytes of data.
>From 10.0.0.138: icmp_seq=1 Redirect Host(New nexthop: 10.0.0.138)
64 bytes from 10.0.0.138: icmp_seq=1 ttl=245 time=66.4 ms
64 bytes from 10.0.0.138: icmp_seq
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