In message <cbc4a14e.28bd2%micho...@cisco.com>, michoski writes:
> On 4/30/12 4:14 PM, "Augie Schwer" <augie.sch...@gmail.com> wrote:
> > I think you've all missed the netmask there, 10.0.0.2 is in that range.
> >
> > augie@augnix:~$ sudo ifconfig lo:1 10.0.0.1 netmask 255.255.255.224
> >
> > augie@augnix:~$ ifconfig lo:1
> > lo:1 Link encap:Local Loopback
> > inet addr:10.0.0.1 Mask:255.255.255.224
> >
> > augie@augnix:~$ ping 10.0.0.2 -c 1
> > PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.
> > 64 bytes from 10.0.0.2: icmp_seq=1 ttl=64 time=0.027 ms
> >
> > --- 10.0.0.2 ping statistics ---
> > 1 packets transmitted, 1 received, 0% packet loss, time 0ms
> >
> > Given all that, can anyone suggest a reason why Bind won't listen on
> > that address?
>
> No, we all saw the netmask.
>
> A few tried to point out the answer...you first need to get the desired
> aliases UP on the system for BIND to listen-on.
>
> For example, loopback is 127/8 so I can ping all those addresses:
>
> OPS:507 r...@dev-ops-test11.vega:mhoskins# ifconfig lo
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> inet6 addr: ::1/128 Scope:Host
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:32 errors:0 dropped:0 overruns:0 frame:0
> TX packets:32 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:8148 (7.9 KiB) TX bytes:8148 (7.9 KiB)
>
> OPS:508 r...@dev-ops-test11.vega:mhoskins# ping 127.0.0.2
> PING 127.0.0.2 (127.0.0.2) 56(84) bytes of data.
> 64 bytes from 127.0.0.2: icmp_seq=1 ttl=64 time=0.012 ms
>
> --- 127.0.0.2 ping statistics ---
> 1 packets transmitted, 1 received, 0% packet loss, time 0ms
> rtt min/avg/max/mdev = 0.012/0.012/0.012/0.000 ms
>
> OPS:509 r...@dev-ops-test11.vega:mhoskins# ping 127.0.0.3
> PING 127.0.0.3 (127.0.0.3) 56(84) bytes of data.
> 64 bytes from 127.0.0.3: icmp_seq=1 ttl=64 time=0.011 ms
>
> --- 127.0.0.3 ping statistics ---
> 1 packets transmitted, 1 received, 0% packet loss, time 0ms
> rtt min/avg/max/mdev = 0.011/0.011/0.011/0.000 ms
The fact that you can ping them just means that you have a kernel
bug.
% ifconfig lo0
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
options=3<RXCSUM,TXCSUM>
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet 10.53.0.1 netmask 0xffffffff
inet6 fd92:7065:b8e:ffff::1 prefixlen 64
inet 10.53.0.2 netmask 0xffffffff
inet6 fd92:7065:b8e:ffff::2 prefixlen 64
inet 10.53.0.3 netmask 0xffffffff
inet6 fd92:7065:b8e:ffff::3 prefixlen 64
inet 10.53.0.4 netmask 0xffffffff
inet6 fd92:7065:b8e:ffff::4 prefixlen 64
inet 10.53.0.5 netmask 0xffffffff
inet6 fd92:7065:b8e:ffff::5 prefixlen 64
inet 10.53.0.6 netmask 0xffffffff
inet6 fd92:7065:b8e:ffff::6 prefixlen 64
inet 10.53.0.7 netmask 0xffffffff
inet6 fd92:7065:b8e:ffff::7 prefixlen 64
inet 10.53.0.50 netmask 0xffffffff
inet 10.53.0.60 netmask 0xffffffff
inet 10.53.0.70 netmask 0xffffffff
inet 10.53.0.80 netmask 0xffffffff
inet 10.53.0.90 netmask 0xffffffff
inet 10.53.0.100 netmask 0xffffffff
inet 10.53.0.110 netmask 0xffffffff
inet 10.53.0.120 netmask 0xffffffff
inet 10.53.0.130 netmask 0xffffffff
inet 10.53.0.140 netmask 0xffffffff
inet 10.53.0.150 netmask 0xffffffff
inet 10.53.0.160 netmask 0xffffffff
inet 10.53.0.170 netmask 0xffffffff
% ping 127.0.0.45
PING 127.0.0.45 (127.0.0.45): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
^C
--- 127.0.0.45 ping statistics ---
4 packets transmitted, 0 packets received, 100.0% packet loss
%
> However, I can't bind daemons to 127.0.0.2, etc. until I configure lo:0,
> etc. aliases for those addresses! If your ifconfig output doesn't show the
> IP you want to listen-on, it won't work. This is how it's been as long as
> I've been alive.
>
> If this is hard to believe, try adding a 10.0.0.2 (or whatever) loopback
> alias with a netmask of 255.255.255.255 (the correct netmask for aliases)
> and see how BIND behaves.
>
> --
> By nature, men are nearly alike;
> by practice, they get to be wide apart.
> -- Confucius
>
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--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org
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