[Unbound-users] Unbound and Bind Views
Hayward, Bruce
Bruce.Hayward at mtsallstream.com
Wed Oct 27 20:39:39 UTC 2010
# interface: 192.0.2.154 at 5003
# interface: 2001:DB8::5
interface: 142.161.130.152 at 49152
interface: 142.161.130.131 at 49152
# interface: 142.161.2.131
interface: 127.0.0.1 at 53
interface: 127.0.0.1 at 49152
# enable this feature to copy the source address of queries to reply.
# Socket options are not supported on all platforms. experimental.
interface-automatic: yes
# port to answer queries from
# port: 53
[root at wnpgmb02hbv-ns09 etc]# netstat -na |grep 49152
[root at wnpgmb02hbv-ns09 etc]#
Bruce
Bruce Hayward, MTS Allstream Inc., (p) 204-958-1983 (e) bruce.hayward at mtsallstream.com <mailto:bruce.hayward at mtsallstream.com>
________________________________
From: Arni Birgisson [mailto:arnib at menandmice.com]
Sent: October 27, 2010 3:16 PM
To: Hayward, Bruce
Cc: unbound-users at unbound.net
Subject: Re: [Unbound-users] Unbound and Bind Views
Hi Bruce,
I have configured a test server at Men & Mice with:
interface: 10.99.99.1 at 9000
and output of netstat -na | grep 9000
tcp 0 0 10.99.99.1:9000 0.0.0.0:* LISTEN
udp 0 0 10.99.99.1:9000 0.0.0.0:*
Notice that UDP ports never display the "LISTEN" state as the TCP ports are.
and sees it listening (netstat -na|grep -I listen or netstat -tnlp | grep unbound or netstat -anlp | grep unbound)
I can't quite see from your command there below, but in your grep command is using a -i switch (lower case i for case-insensitive).
Hope this helps!
Best regards
Arni.
Arni Birgisson
Professional Services
Men & Mice
Address: Noatun 17, IS-105, Reykjavik, Iceland
Phone: +354-412-1500
Email: arnib at menandmice.com
www.menandmice.com <http://www.menandmice.com/>
Men & Mice
We bring control and flexibility to network management
Disclaimer: www.menandmice.com/disclaimer
On Oct 27, 2010, at 7:56 PM, Hayward, Bruce wrote:
Before I spend more on this (I even have Iptables firewall logs running as well as the usual assortment)
Is there someone out there that has configured an interface in the unbound.conf to a port other than 53? (something in the private/dynamic range)
Per the unbound.conf man:
interface: <ip address[@port]>
and sees it listening (netstat -na|grep -I listen or netstat -tnlp | grep unbound or netstat -anlp | grep unbound)
?
Thanks
Bruce
Bruce Hayward, MTS Allstream Inc., (p) 204-958-1983 (e) bruce.hayward at mtsallstream.com
-----Original Message-----
From: Ondřej Surý [mailto:ondrej at sury.org]
Sent: October 27, 2010 12:46 PM
To: Hayward, Bruce
Cc: unbound-users at unbound.net
Subject: Re: [Unbound-users] Unbound and Bind Views
Hi,
On Wed, Oct 27, 2010 at 19:32, Hayward, Bruce
<Bruce.Hayward at mtsallstream.com> wrote:
Hi
Would then:
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 53 -j REDIRECT --to-port 49152
I think so, but it's a long time since I had to use iptables.
regardless of IP address direct any ip hitting port 53 to redirect to port 49152?
Also do not see the port showing up with the netstat regardless of options - does unbound not open that port when configured?
Try: netstat -tnlp and -unlp and if the port doesn't show up then
check the logs. (Well check the log file anyway as a first thing when
something doesn't work as expected...)
root at ookami:~# netstat -tnlp | grep unbound
tcp 0 0 127.0.0.1:53 0.0.0.0:*
LISTEN 1715/unbound
tcp 0 0 127.0.0.1:953 0.0.0.0:*
LISTEN 1715/unbound
tcp6 0 0 ::1:53 :::*
LISTEN 1715/unbound
tcp6 0 0 ::1:953 :::*
LISTEN 1715/unbound
root at ookami:~# netstat -anlp | grep unbound
tcp 0 0 127.0.0.1:53 0.0.0.0:*
LISTEN 1715/unbound
tcp 0 0 127.0.0.1:953 0.0.0.0:*
LISTEN 1715/unbound
tcp6 0 0 ::1:53 :::*
LISTEN 1715/unbound
tcp6 0 0 ::1:953 :::*
LISTEN 1715/unbound
udp 0 0 127.0.0.1:53 0.0.0.0:*
1715/unbound
udp6 0 0 ::1:53 :::*
1715/unbound
unix 3 [ ] STREAM CONNECTED 9599 1715/unbound
unix 3 [ ] STREAM CONNECTED 9598 1715/unbound
unix 2 [ ] DGRAM 9586 1715/unbound
-----Original Message-----
From: Ondřej Surý [mailto:ondrej at sury.org]
Sent: October 27, 2010 12:22 PM
To: Hayward, Bruce
Cc: unbound-users at unbound.net
Subject: Re: [Unbound-users] Unbound and Bind Views
On Wed, Oct 27, 2010 at 19:14, Hayward, Bruce
<Bruce.Hayward at mtsallstream.com> wrote:
Hi
I been hammering my way through this.
The tool that I have on the RHEL servers is iptables (not something that we normally use)
I have figured out enough to know that I cannot use port forwarding as this is to localhost. But must use thee port redirect option E.g.
iptables -t nat -A PREROUTING -p tcp -d 142.161.130.xxx --dport 53 -j REDIRECT --to-ports 49152
iptables -t nat -A PREROUTING -p udp -d 142.161.130.xxx --dport 53 -j REDIRECT --to-ports 49152
Means if 142.161.130.xxx will connect at port 53 of this server then it will actually connected to 49152
I think you need -s 142... and not -d 142... here. -s is source
address, -d is destination address.
And in the unbound.conf file I have setup
interface: 142.161.130.xxy at 49152
interface: 142.161.130.xxx at 49152
interface: 127.0.0.1 at 53
interface: 127.0.0.1 at 49152
When I do a netstat -na|grep -i listen - I do not see the port 49152 listening.
What am I missing?
-l switch to nestat.
Bruce
Bruce Hayward, MTS Allstream Inc., (p) 204-958-1983 (e) bruce.hayward at mtsallstream.com
-----Original Message-----
From: Ondřej Surý [mailto:ondrej at sury.org]
Sent: October 25, 2010 8:33 AM
To: Hayward, Bruce
Cc: unbound-users at unbound.net
Subject: Re: [Unbound-users] Unbound and Bind Views
Hi Bruce,
it should be fairly easy to accomplish both option using DNAT on linux
(or using other translation mechanisms either on the router or on the
end box).
f.e. on linux you can use:
- 10.10.10.1 is the normal address
- 10.10.10.2 is extra address you use to serve internal clients (can
be localhost if NATed on the box)
- 192.168.1.1/32 is the specific CIDR
iptables -t nat -A PREROUTING -s 192.168.1.1/32 -d 10.10.10.1 -j DNAT
--to-destination 10.10.14.2
If you do the NAT on the router before, it has the added benefit of
splitting the load (so you can provide less loaded service to your
customers... etc.)
Ondrej
On Mon, Oct 25, 2010 at 15:18, Hayward, Bruce
<Bruce.Hayward at mtsallstream.com> wrote:
Hey
On specific resolvers we use bind views to direct those who come from an IP in a specific CIDR to use a specific zone. We have two cases of these views.
We also use views to isolate those that should only use internal zones versus those that should not use internal zones (external customers)
Those that do not come from an IP in a specific CIDR use a global zone.
"Views" were introduced in Bind 9.
http://oreilly.com/pub/a/oreilly/networking/news/views_0501.html
Bruce
Bruce Hayward, MTS Allstream Inc., (p) 204-958-1983 (e) bruce.hayward at mtsallstream.com
-----Original Message-----
From: unbound-users-bounces at NLnetLabs.nl [mailto:unbound-users-bounces at NLnetLabs.nl] On Behalf Of Ondrej Surý
Sent: October 21, 2010 9:52 AM
To: unbound-users at unbound.net
Subject: Re: [Unbound-users] Unbound and Bind Views
Hey Bruce,
I think that it's pretty well documented in the mail you sent a
link... you setup two unbound instances and mangle the traffic from
set of ip addresses using standard firewall/nat features your
operating system has.
Anyway maybe if you can explain what you are trying to accomplish then
we can propose alternative without views.
Ondrej
On Thu, Oct 21, 2010 at 15:32, Hayward, Bruce
<Bruce.Hayward at mtsallstream.com> wrote:
One area of Bind that we use is views to direct traffic.
Before we can switch to Unbound, we would need a means of emulating
views.
In researching this (on Google) I came across a thread discussing this:
http://www.mail-archive.com/unbound-users@unbound.net/msg00337.html
Has anyone documented steps to accomplish this?
Thanks
Bruce
Bruce Hayward, MTS Allstream Inc., (p) 204-958-1983 (e)
bruce.hayward at mtsallstream.com
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Ondřej Surý <ondrej at sury.org>
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