Re: AW: ipv6 PTR in zone file
On Tue, Apr 12, 2011 at 11:21:14AM +0200, Marco Davids (SIDN) wrote:
...
Or do it 'the BIND way':
dig -x 2001:7b8:c05::80:1 | grep ip6.arpa | tail -1 | awk '{print $1}'
...
If things work right, this seems to give the name of the smallest
existing enclosing zone (from the SOA or NS record), not the entry in
the zone. Wasn't the latter what was desired? And what if you are
creating the new zone?
As 'arpaname' given the above, returns:
1.0.0.0.0.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.5.0.C.0.8.B.7.0.1.0.0.2.IP6.ARPA
then the entry
1.0.0.0.0.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0 PTR sidn.bip.bit.nl.
in the 5.0.c.0.8.b.7.0.1.0.0.2.ip6.arpa. zone file
(zone.2001:07b8:0c05?) may be the best we can do in general.
In specific, we could enter:
$ORIGIN 0.0.0.0.0.0.0.0.0.0.0.0
1.0.0.0.0.8.0.0 PTR sidn.bip.bit.nl.
...
$ORIGIN 5.0.c.0.8.b.7.0.1.0.0.2.ip6.arpa.
if we have multiple addresses in that subnet.
But M. de Nostredame already is aware of how to do this.
Using one of the existing IPAM (IP Address Management) appliances might
be what you need. BT has one that looked good.
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Re: AW: ipv6 PTR in zone file
pint use Net::IP
pint $foo = new Net::IP '2001:db8::42'
3
pint $foo-reverse_ip()
2.4.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.
0.1.0.0.2.ip6.arpa.
pint
Or you could just dash off the simple perl expression to do the job:
my $ptr = do {
my($head,$tail) =
map { join '', map { sprintf '%04s',$_; } split /:/,$_; }
split /::/, $addr . '::', 3;
my $hex32 = '0' x 32;
substr( $hex32, 0, length($head) ) = $head;
substr( $hex32, 32, -length($tail) ) = $tail;
join '.', ( reverse split //, $hex32 ), 'ip6.arpa';
};
John
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Re: AW: ipv6 PTR in zone file
On Fri, Apr 15, 2011 at 10:56:00AM -0400, John Wobus wrote:
pint use Net::IP
pint $foo = new Net::IP '2001:db8::42'
3
pint $foo-reverse_ip()
2.4.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.
0.1.0.0.2.ip6.arpa.
pint
Or you could just dash off the simple perl expression to do the job:
my $ptr = do {
my($head,$tail) =
map { join '', map { sprintf '%04s',$_; } split /:/,$_; }
split /::/, $addr . '::', 3;
my $hex32 = '0' x 32;
substr( $hex32, 0, length($head) ) = $head;
substr( $hex32, 32, -length($tail) ) = $tail;
join '.', ( reverse split //, $hex32 ), 'ip6.arpa';
};
In case Pythonistas feel neglected, here's my contribution:
- Cut here --
#!/usr/bin/env python
#
import sys, socket
def ip6toptr(address):
return PTR owner name of an IPv6 address
try:
packed = socket.inet_pton(socket.AF_INET6, address)
except socket.error:
raise ValueError(%s isn't an IPv6 address % address)
hexstring = ''.join([%02x % ord(x) for x in packed])
ptrowner = %s.ip6.arpa % \
'.'.join([x for x in hexstring[::-1]])
return ptrowner
if __name__ == '__main__':
print ip6toptr(sys.argv[1])
- Cut here --
--
Shumon Huque
University of Pennsylvania.
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Re: AW: ipv6 PTR in zone file
On Tue, Apr 12, 2011 at 3:41 AM, Niall O'Reilly niall.orei...@ucd.ie wrote: On 12 Apr 2011, at 10:49, Michel de Nostredame wrote: Thanks Walter and Marco. Those two tool/method do resolve short term needs. Thanks again. (btw, the URL form Walter should be ftp://ftp.bieringer.de/pub/linux/IPv6/ipv6calc/ ) Beside them, is any potential possibility to have something build-in in BIND config/zone file as kind of beautiful (my, and my team, personal point of view) solution? Anyone knows if there was any similar discussions inside BIND developer group before? Not that I recall. I'm not sure what benefit you see in adding a feature to the BIND server and tools. I should have thought that a suitable script, either for provisioning your zone file(s) or for applying a dynamic update, would both relieve any burden you currently have, and leave you more flexibility than would an extension to BIND. If there is $REVERSE (or some similar directive) can put inside ZONE file and named.conf file, then it would be a good help for those people who need to manually manage PTR records. From regular people point of view, it could be easier to read, maintain and less possible of human errors. Not sure how large will be the effort to add a new directive into BIND, but that just a feed back, and wish, from me and my team members, who needs to maintain few hundreds of statically assigned IPs for servers and CE/PE routers. -- Michel~ ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: AW: ipv6 PTR in zone file
On Apr 13, 2011, at 4:58 PM, Michel de Nostredame wrote: On Tue, Apr 12, 2011 at 3:41 AM, Niall O'Reilly niall.orei...@ucd.ie wrote: On 12 Apr 2011, at 10:49, Michel de Nostredame wrote: Thanks Walter and Marco. Those two tool/method do resolve short term needs. Thanks again. (btw, the URL form Walter should be ftp://ftp.bieringer.de/pub/linux/IPv6/ipv6calc/ ) Beside them, is any potential possibility to have something build-in in BIND config/zone file as kind of beautiful (my, and my team, personal point of view) solution? Anyone knows if there was any similar discussions inside BIND developer group before? Not that I recall. I'm not sure what benefit you see in adding a feature to the BIND server and tools. I should have thought that a suitable script, either for provisioning your zone file(s) or for applying a dynamic update, would both relieve any burden you currently have, and leave you more flexibility than would an extension to BIND. If there is $REVERSE (or some similar directive) can put inside ZONE file and named.conf file, then it would be a good help for those people who need to manually manage PTR records. From regular people point of view, it could be easier to read, maintain and less possible of human errors. Not sure how large will be the effort to add a new directive into BIND, but that just a feed back, and wish, from me and my team members, who needs to maintain few hundreds of statically assigned IPs for servers and CE/PE routers. Back in the good old days, when DNS administrators didn't have fancy tools, there was a common solution to this problem. I wrote a little script which took a host name and an IP address (IPv4, but the idea would be the same for IPv6) and generated the forward DNS A record for this and append it, or insert it, into the forward zone file. Then, this same script would then take this same information and add the appropriate PTR into the appropriate reverse zone file. The h2n script was another tool commonly used to manage DNS information from the contents of the /etc/hosts file. The problem with introducing some new directive into BIND is that your idea of what would be the appropriate zones files to work with may not be the same as someone else. For example, in the forward zone, would assigning MX records be the correct result also? There are too many possibilities to allow solving everyone's needs. This is something that needs to be done by the DNS administrator who understands the needs of the zone. (At least in my very humble opinion). Bill Larson ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: AW: ipv6 PTR in zone file
On 4/13/2011 6:58 PM, Michel de Nostredame wrote: Not sure how large will be the effort to add a new directive into BIND, but that just a feed back, and wish, from me and my team members, who needs to maintain few hundreds of statically assigned IPs for servers and CE/PE routers. Dynamic zones and the judicious use of arpaname seems like the best bet to me (without adding extra code to BIND, that is). AlanC signature.asc Description: OpenPGP digital signature ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
AW: ipv6 PTR in zone file
Hello, you could use ipv6calc (ftp://ftp.bieringer.de/pub/linux/ipv6/ipv6calc) to calculate the reverse strings. Then you can put them into the zone file. With Best regards, Walter Im Auftrag von Michel de Nostredame Gesendet: Montag, 11. April 2011 20:44 An: bind-users Betreff: ipv6 PTR in zone file Hi BIND Users, I am not sure if my post here is proper or not. If not please kindly guide me to a correct list. I have lot of static IPv6 address needs to add into DNS PTR record. Most of them are server IP addresses and addresses on router interfaces. Compose proper PTR records, without human errors, is highly difficult (compares to IPv4 PTR records), as we encode some customer information into the address. I tried to look into bit-string and soon realized it is already removed from recent BIND versions. Then tried to search $REVERSE and $INVERSE on Google but got no much luck; seems not much development / discussion recently. For example, today we probably do PTR list this, $ORIGIN 0.0.0.0.0.0.d.4.1.a.1.0.1.0.0.2.ip6.arpa. 1.0.1.a.0.0.0.5.6.0.c.1.0.0.5.6 PTR xe-3-0-3-101.ar.par1.fr.netname.net. What I am think about is if there is any potential possibility to compose IPv6 PTR records in ZONE files in a little easier method? something like $ORIGIN $REVERSE(2001:01a1:4d00:).ip6.arpa. $REVERSE(6500:1c06:5000:a101) PTR xe-3-0-3-101.ar.par1.fr.netname.net. ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: AW: ipv6 PTR in zone file
On 04/12/11 10:50, walter.jontofs...@t-systems.com wrote:
you could use ipv6calc (ftp://ftp.bieringer.de/pub/linux/ipv6/ipv6calc) to
calculate the reverse strings.
Yes.
Or do it 'the BIND way':
dig -x 2001:7b8:c05::80:1 | grep ip6.arpa | tail -1 | awk '{print $1}'
--
Marco
Im Auftrag von Michel de Nostredame
Gesendet: Montag, 11. April 2011 20:44
An: bind-users
Betreff: ipv6 PTR in zone file
Hi BIND Users,
I am not sure if my post here is proper or not. If not please
kindly guide me to a correct list.
I have lot of static IPv6 address needs to add into DNS PTR record.
Most of them are server IP addresses and addresses on router
interfaces.
Compose proper PTR records, without human errors, is highly
difficult (compares to IPv4 PTR records), as we encode some
customer information into the address.
I tried to look into bit-string and soon realized it is
already removed from recent BIND versions. Then tried to
search $REVERSE and $INVERSE on Google but got no much
luck; seems not much development / discussion recently.
For example, today we probably do PTR list this,
$ORIGIN 0.0.0.0.0.0.d.4.1.a.1.0.1.0.0.2.ip6.arpa.
1.0.1.a.0.0.0.5.6.0.c.1.0.0.5.6 PTR
xe-3-0-3-101.ar.par1.fr.netname.net.
What I am think about is if there is any potential possibility
to compose IPv6 PTR records in ZONE files in a little easier method?
something like
$ORIGIN $REVERSE(2001:01a1:4d00:).ip6.arpa.
$REVERSE(6500:1c06:5000:a101) PTR
xe-3-0-3-101.ar.par1.fr.netname.net.
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Re: AW: ipv6 PTR in zone file
On Tue, Apr 12, 2011 at 2:21 AM, Marco Davids (SIDN)
marco.dav...@sidn.nl wrote:
On 04/12/11 10:50, walter.jontofs...@t-systems.com wrote:
you could use ipv6calc (ftp://ftp.bieringer.de/pub/linux/ipv6/ipv6calc) to
calculate the reverse strings.
Yes.
Or do it 'the BIND way':
dig -x 2001:7b8:c05::80:1 | grep ip6.arpa | tail -1 | awk '{print $1}'
Thanks Walter and Marco. Those two tool/method do resolve short term
needs. Thanks again.
(btw, the URL form Walter should be
ftp://ftp.bieringer.de/pub/linux/IPv6/ipv6calc/ )
Beside them, is any potential possibility to have something build-in
in BIND config/zone file as kind of beautiful (my, and my team,
personal point of view) solution?
Anyone knows if there was any similar discussions inside BIND
developer group before?
--
Michel~
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Re: AW: ipv6 PTR in zone file
On 04/12/11 11:49, Michel de Nostredame wrote:
you could use ipv6calc (ftp://ftp.bieringer.de/pub/linux/ipv6/ipv6calc) to
calculate the reverse strings.
Yes.
Or do it 'the BIND way':
dig -x 2001:7b8:c05::80:1 | grep ip6.arpa | tail -1 | awk '{print $1}'
Beside them, is any potential possibility to have something build-in
in BIND config/zone file as kind of beautiful (my, and my team,
personal point of view) solution?
I wonder if the $GENERATE directive could work for you.
Not sure...
http://www.zytrax.com/books/dns/ch8/generate.html
--
Marco
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Re: AW: ipv6 PTR in zone file
On 12 Apr 2011, at 10:49, Michel de Nostredame wrote:
Thanks Walter and Marco. Those two tool/method do resolve short term
needs. Thanks again.
(btw, the URL form Walter should be
ftp://ftp.bieringer.de/pub/linux/IPv6/ipv6calc/ )
Beside them, is any potential possibility to have something build-in
in BIND config/zone file as kind of beautiful (my, and my team,
personal point of view) solution?
Anyone knows if there was any similar discussions inside BIND
developer group before?
Not that I recall.
I'm not sure what benefit you see in adding a feature to
the BIND server and tools. I should have thought that a
suitable script, either for provisioning your zone file(s)
or for applying a dynamic update, would both relieve any
burden you currently have, and leave you more flexibility
than would an extension to BIND.
FWIW, here's yet another way, grabbed from a shell (bash)
session.
dhcp-c101a88b(niall)4: alias pint
alias pint='perl -ne '\''sub BEGIN {print pint } sub END {print \n} printf
%s\npint ,eval'\'''
dhcp-c101a88b(niall)5: pint
pint use Net::IP
pint $foo = new Net::IP '2001:db8::42'
3
pint $foo-reverse_ip()
2.4.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa.
pint ^D
dhcp-c101a88b(niall)6:
Best regards,
Niall O'Reilly
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Re: AW: ipv6 PTR in zone file
On Apr 12 2011, Marco Davids (SIDN) wrote:
On 04/12/11 10:50, walter.jontofs...@t-systems.com wrote:
you could use ipv6calc (ftp://ftp.bieringer.de/pub/linux/ipv6/ipv6calc) to
calculate the reverse strings.
Yes.
Or do it 'the BIND way':
dig -x 2001:7b8:c05::80:1 | grep ip6.arpa | tail -1 | awk '{print $1}'
Oh, yuck. There is a perfectly good program shipped with BIND to do this:
$ type arpaname
arpaname is /usr/local/sbin/arpaname
$ arpaname 2001:7b8:c05::80:1
1.0.0.0.0.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.5.0.C.0.8.B.7.0.1.0.0.2.IP6.ARPA
--
Chris Thompson
Email: c...@cam.ac.uk
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