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Re: An Ounce of Prevention

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On Tue, Jun 18, 2019 at 11:12:40AM +0000, Andy Smith wrote:
> Hi Bob,
> 
> On Tue, Jun 18, 2019 at 12:07:16AM -0400, Bob Bernstein wrote:
> > On Tue, 18 Jun 2019, Andy Smith wrote:
> > >What happens if you try to ping something? Like:
> 
> […]
> 
> > PING linode.com(2600:3c00::22 (2600:3c00::22)) 56 data bytes
> > 64 bytes from 2600:3c00::22 (2600:3c00::22): icmp_seq=1 ttl=51 time=63.4 ms
> 
> So it seems you have IPv6 connectivity but not IPv4, although you do
> have your v4 address configured on the interface.

... or it's just (v4) ICMP being filtered out somewhere. There are
firewall configurations which do that.

>                                                  I'd be interested
> in seeing your routing table (the "ip route show" command I
> mentioned before).

I think traceroute would be more interesting in this context:
it has options explicitly made for such firewall landscapes.

Read the man page or ask here if interested.

Cheers
-- t

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Thread

An Ounce of Prevention Bob Bernstein <poobah@ruptured-duck.com> - 2019-06-17 20:30 +0200
  Re: An Ounce of Prevention Greg Wooledge <wooledg@eeg.ccf.org> - 2019-06-17 20:40 +0200
    Re: An Ounce of Prevention Tixy <tixy@yxit.co.uk> - 2019-06-17 20:50 +0200
      Re: An Ounce of Prevention Tixy <tixy@yxit.co.uk> - 2019-06-17 21:00 +0200
        Re: An Ounce of Prevention Tixy <tixy@yxit.co.uk> - 2019-06-17 21:00 +0200
    Re: An Ounce of Prevention Bob Bernstein <bob@fanatick.org> - 2019-06-17 22:00 +0200
      Re: An Ounce of Prevention Bob Bernstein <poobah@ruptured-duck.com> - 2019-06-18 02:50 +0200
        Re: An Ounce of Prevention Andy Smith <andy@strugglers.net> - 2019-06-18 03:00 +0200
          Re: An Ounce of Prevention Bob Bernstein <bob@fanatick.org> - 2019-06-18 03:50 +0200
            Re: An Ounce of Prevention Andy Smith <andy@strugglers.net> - 2019-06-18 04:40 +0200
              Re: An Ounce of Prevention Bob Bernstein <bob@fanatick.org> - 2019-06-18 06:30 +0200
                Re: An Ounce of Prevention <tomas@tuxteam.de> - 2019-06-18 10:20 +0200
                Re: An Ounce of Prevention Richard Hector <richard@walnut.gen.nz> - 2019-06-18 10:40 +0200
                Re: An Ounce of Prevention Andy Smith <andy@strugglers.net> - 2019-06-18 13:20 +0200
                Re: An Ounce of Prevention <tomas@tuxteam.de> - 2019-06-18 13:40 +0200
                Re: An Ounce of Prevention Bob Bernstein <bob@fanatick.org> - 2019-06-18 17:40 +0200
  Re: An Ounce of Prevention Joe <joe@jretrading.com> - 2019-06-17 21:50 +0200
  Re: An Ounce of Prevention andreimpopescu@gmail.com - 2019-07-02 11:20 +0200

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