Re: Why does netstat not work in jails?

From: Julian Elischer <julian_at_freebsd.org>
Date: Fri, 28 Aug 2015 10:12:24 +0800
On 8/28/15 9:54 AM, Chris H wrote:
> I've been attempting to run jails on an 11-CURRENT
> for the purpose of building world/kernel && ports
> for all of our 9-STABLE production servers. I'm using
> standard/classic jail setup(s) -- not using any
> of the "convenience" ports/applications that abstract
> the process in any way.
> While everything seemed to go as intended/anticipated,
> I'm seeing things I *didn't* expect.
> The host network get's it's "public" IP from the router
> in front of it. From the router, I insure that it is
> allocated the same non-public IP everytime. So DHCP
> assigns it 192.168.0.100. I assigned the jail 192.168.0.103.
> SSHD is started within the jail, root IS allowed login.
> But any attempt to ssh to 192.168.0.103 from the host,
> returns:
> ssh_exchange_identification: Connection closed by remote host.
>
> SSHD id NOT running on the host.
>
> inetd_flags="-wW -a 192.168.0.100" and syslogd_flags="-ss"
> is set on the host via rc.conf
what does netstat -aAn show (on the main host).

> second issue; loging into the jail, via jexex. If I perform:
> netstat -nr
> The following is returned:
> netstat: kvm not available: /dev/mem: No such file or directory
is there a /dev in the jail?  if you have set it up, have you allowed 
mem to be one of the exported devices?
I forget the exact details on how to set this but hopefully it's a 
hint. I have to look it up every time.

> Routing tables
> rt_tables: symbol not in namelist
>
> Any thought's jump out at anyone?
>
> Thanks!
>
> --Chris
>
> --
>
>
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Received on Fri Aug 28 2015 - 00:13:54 UTC

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