[ipv6hackers] IPv6 host scanning in IPv6

Fernando Gont fgont at si6networks.com
Sat Apr 21 17:58:55 CEST 2012

Hi, Chris,

Thanks so much for your timely response! -- Please find my comments

On 04/21/2012 11:46 AM, Christiaan Ottow wrote:
> vic0:
> 1500 lladdr 00:0c:29:50:3c:79 priority: 0 groups: egress media:
> Ethernet autoselect status: active inet6
> fe80::20c:29ff:fe50:3c79%vic0 prefixlen 64 scopeid 0x1 inet
> netmask 0xffffff00 broadcast inet6
> 2000:1337::8cab:b106:43b0:68f0 prefixlen 64 autoconf autoconfprivacy
> pltime 14398 vltime 86398

This could be problematic, since these addresses are valid for just 24
hours (vltime==86398). i.e., if you were used to e.g. days-long ssh
sessions, this would break them.

That said, did you check whether OpenBSD configures new addresses once
pltime becomes 0? If it doesn't, then after pltime seconds you'd have no
"preferred" addresses. (After 24 hs or so, the system should have about
6 global addresses per interface -- assuming the same settings as above).


Best regards,
Fernando Gont
SI6 Networks
e-mail: fgont at si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492

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