Re: [Dnsmasq-discuss] IPv6: Router with RA + static DHCPv6 from dnsmasq on separate host

2017-08-20 Thread M. Buecher 

On 2017-08-20 14:06, M. Buecher wrote:


On 2017-08-18 15:38, M. Buecher wrote:


Hello dnsmasq fellows,
Hello Simon,

I want to assign additional static DHCPv6 global unicast addresses 
(GUA) to some machines (mainly servers).

Yet I have failed to do so with dnsmasq.


Got it working. Indeed it was working.

The GUA prefix [1] is advertised by my router "AVM FRITZ!Box 7490" 
[3].
Its Router Advertisement (RA) has M-, O- and A-flag set. Priority is 
middle.

And it is the standard gateway for Internet connections.

dnsmasq 2.76 is running on a Raspberry with Raspbian 8 "Jessie" [4].
It is the only DNSv4/v6 server in the LAN and serves the local domain.
All other requests are forwarded by dnsmasq via IPv4 to the DNS relay 
of the router, this way those requests are resolved by the ISP's DNS 
servers.
It also advertises the Unique Local Addresses (ULA) [2] for the LAN 
via RA and assigns addresses via DHCPv6 only.
The host with dnsmasq (Raspberry) has a GUA via SLAAC by the router's 
RA.


Test machine is Windows 10 with latest updates.
It got its ULA via DHCPv6 from dnsmasq and has a GUA via SLAAC by the 
router's RA.
Additionally a second GUA is present due to Windows' IPv6 privacy 
extensions for outgoing connections.

*But* it doesn't have it's static GUA from dnsmasq!

Am I missing something in my dnsmasq configuration (see below)?
Or do I have to configure the clients in another way?
Any other enhancements for my configuration?


If you run "ipconfig /renew6 " on Windows (here 10), then 
Windows only requests the existing IPv6 addresses to be renewed.
To also get new addresses for the Windows you have to release all IPv6 
addresses before with "ipconfig /release6 ".


So on Windows always do the following for testing in an admin/elevated 
command prompt or Powershell:

ipconfig /release [Name Pattern]
ipconfig /renew [Name Pattern]


Sorry, had copied the IPv4 instrcutions to the mail.
Of course it should be:

ipconfig /release6 [Name Pattern]
ipconfig /renew6 [Name Pattern]

If this doesn't help, then deactivate and re-activate the interface via 
netsh to start afresh:

netsh interface set interface  admin=disabled
netsh interface set interface  admin=enabled


By the way:
Does dnsmasq also send a RA for the second/GUA dhcp range? How can I 
avoid this?

I would prefer to handle RA settings per dhcp-range via tags.


Yes, sends RA for each IPv6 DHCP range it manages. Couldn't find an 
option to disable or enable it for a specific dhcp range.
Additionally if a dhcp range is defined multiple times, it also sends 
the RA multiple times.

Will create to feature requests for these issues in separate posts.


Configuration:
1. File /etc/default/dnsmasq (Debian specific)
#DOMAIN_SUFFIX=`dnsdomainname`
#DNSMASQ_OPTS="--conf-file=/etc/dnsmasq.alt"
ENABLED=1
CONFIG_DIR=/etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new
IGNORE_RESOLVCONF=yes

2. dnsmasq configuration
# IPv4 options: router, dns, ntp
dhcp-option=tag:lan4,3,10.0.0.254
dhcp-option=tag:lan4,6,0.0.0.0
dhcp-option=tag:lan4,42,10.0.0.254

# IPv6 options: dns, domain
dhcp-option=option6:dns-server,[fd00::]
dhcp-option=tag:ula6,option6:domain-search,local.domain

dhcp-authoritative
domain-needed
strict-order
no-resolv
localise-queries
bogus-priv
expand-hosts
local-service
domain=local.domain
local=/local.domain/
addn-hosts=/etc/hosts.static
addn-hosts=/etc/hosts.block
stop-dns-rebind
rebind-localhost-ok
dhcp-broadcast=tag:needs-broadcast

server=10.0.0.254

### IPv4 range
dhcp-range=set:lan4,10.0.0.100,10.0.0.199,255.255.255.0,12h

### IPv6 ranges
dhcp-range=set:ula6,fd7a:d:e:f::1:0,fd7a:d:e:f::1:,64,12h
dhcp-range=set:gua6,2003:a:b:c00::1:0,2003:a:b:c00::1:,static,64,12h
enable-ra

dhcp-host=00:50:56:39:1d:3e,10.0.0.50,[::32],test-machine

Kind regards
Maddes

[1] Telekom native IPv6 Internet connection
IPv6 prefix: 2003:a:b:c00::/56 (c|00 = 256 subnets possible)
IPv6 adresses: 2003:a:x:y:1:2:3:4 (External IPv6 address from ISP 
subnet)


[2] Unique Local Addresses
ULA: fd7a:d:e:f::/64

[3] Router AVM FRITZ!Box 7490
FRITZ!OS: 06.83 (German)
DHCPv6 for LAN: Off
Standard-Gateway for Internet: On
DNS via RA: Off (RFC 5006)
RA: Enabled with M and O flag, SLAAC allowed (=A flag); DNS not 
advertised

https://en.avm.de/service/fritzbox/fritzbox-7490/overview/
https://en.avm.de/products/fritzbox/fritzbox-7490/

[4] Raspberry Pi 2
OS: Raspbian, Derivative of Debian 8 "Jessie", build from Raspberry Pi 
Foundation

https://www.raspberrypi.org/products/raspberry-pi-2-model-b/
https://www.raspberrypi.org/downloads/raspbian/
https://www.raspbian.org/


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Re: [Dnsmasq-discuss] IPv6: Router with RA + static DHCPv6 from dnsmasq on separate host

2017-08-20 Thread M. Buecher 

On 2017-08-18 15:38, M. Buecher wrote:

Hello dnsmasq fellows,
Hello Simon,

I want to assign additional static DHCPv6 global unicast addresses 
(GUA) to some machines (mainly servers).

Yet I have failed to do so with dnsmasq.


Got it working. Indeed it was working.


The GUA prefix [1] is advertised by my router "AVM FRITZ!Box 7490" [3].
Its Router Advertisement (RA) has M-, O- and A-flag set. Priority is 
middle.

And it is the standard gateway for Internet connections.

dnsmasq 2.76 is running on a Raspberry with Raspbian 8 "Jessie" [4].
It is the only DNSv4/v6 server in the LAN and serves the local domain.
All other requests are forwarded by dnsmasq via IPv4 to the DNS relay 
of the router, this way those requests are resolved by the ISP's DNS 
servers.
It also advertises the Unique Local Addresses (ULA) [2] for the LAN via 
RA and assigns addresses via DHCPv6 only.
The host with dnsmasq (Raspberry) has a GUA via SLAAC by the router's 
RA.


Test machine is Windows 10 with latest updates.
It got its ULA via DHCPv6 from dnsmasq and has a GUA via SLAAC by the 
router's RA.
Additionally a second GUA is present due to Windows' IPv6 privacy 
extensions for outgoing connections.

*But* it doesn't have it's static GUA from dnsmasq!

Am I missing something in my dnsmasq configuration (see below)?
Or do I have to configure the clients in another way?
Any other enhancements for my configuration?


If you run "ipconfig /renew6 " on Windows (here 10), then 
Windows only requests the existing IPv6 addresses to be renewed.
To also get new addresses for the Windows you have to release all IPv6 
addresses before with "ipconfig /release6 ".


So on Windows always do the following for testing in an admin/elevated 
command prompt or Powershell:

ipconfig /release [Name Pattern]
ipconfig /renew [Name Pattern]

If this doesn't help, then deactivate and re-activate the interface via 
netsh to start afresh:

netsh interface set interface  admin=disabled
netsh interface set interface  admin=enabled



By the way:
Does dnsmasq also send a RA for the second/GUA dhcp range? How can I 
avoid this?

I would prefer to handle RA settings per dhcp-range via tags.


Yes, sends RA for each IPv6 DHCP range it manages. Couldn't find an 
option to disable or enable it for a specific dhcp range.
Additionally if a dhcp range is defined multiple times, it also sends 
the RA multiple times.

Will create to feature requests for these issues in separate posts.



Configuration:
1. File /etc/default/dnsmasq (Debian specific)
#DOMAIN_SUFFIX=`dnsdomainname`
#DNSMASQ_OPTS="--conf-file=/etc/dnsmasq.alt"
ENABLED=1
CONFIG_DIR=/etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new
IGNORE_RESOLVCONF=yes

2. dnsmasq configuration
# IPv4 options: router, dns, ntp
dhcp-option=tag:lan4,3,10.0.0.254
dhcp-option=tag:lan4,6,0.0.0.0
dhcp-option=tag:lan4,42,10.0.0.254

# IPv6 options: dns, domain
dhcp-option=option6:dns-server,[fd00::]
dhcp-option=tag:ula6,option6:domain-search,local.domain

dhcp-authoritative
domain-needed
strict-order
no-resolv
localise-queries
bogus-priv
expand-hosts
local-service
domain=local.domain
local=/local.domain/
addn-hosts=/etc/hosts.static
addn-hosts=/etc/hosts.block
stop-dns-rebind
rebind-localhost-ok
dhcp-broadcast=tag:needs-broadcast

server=10.0.0.254

### IPv4 range
dhcp-range=set:lan4,10.0.0.100,10.0.0.199,255.255.255.0,12h

### IPv6 ranges
dhcp-range=set:ula6,fd7a:d:e:f::1:0,fd7a:d:e:f::1:,64,12h
dhcp-range=set:gua6,2003:a:b:c00::1:0,2003:a:b:c00::1:,static,64,12h
enable-ra

dhcp-host=00:50:56:39:1d:3e,10.0.0.50,[::32],test-machine

Kind regards
Maddes

[1] Telekom native IPv6 Internet connection
IPv6 prefix: 2003:a:b:c00::/56 (c|00 = 256 subnets possible)
IPv6 adresses: 2003:a:x:y:1:2:3:4 (External IPv6 address from ISP 
subnet)


[2] Unique Local Addresses
ULA: fd7a:d:e:f::/64

[3] Router AVM FRITZ!Box 7490
FRITZ!OS: 06.83 (German)
DHCPv6 for LAN: Off
Standard-Gateway for Internet: On
DNS via RA: Off (RFC 5006)
RA: Enabled with M and O flag, SLAAC allowed (=A flag); DNS not 
advertised

https://en.avm.de/service/fritzbox/fritzbox-7490/overview/
https://en.avm.de/products/fritzbox/fritzbox-7490/

[4] Raspberry Pi 2
OS: Raspbian, Derivative of Debian 8 "Jessie", build from Raspberry Pi 
Foundation

https://www.raspberrypi.org/products/raspberry-pi-2-model-b/
https://www.raspberrypi.org/downloads/raspbian/
https://www.raspbian.org/



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Re: [Dnsmasq-discuss] IPv6: Router with RA + static DHCPv6 from dnsmasq on separate host

2017-08-19 Thread Kevin Darbyshire-Bryant 



On 18/08/17 19:54, David Kerr wrote:

Maddes,
   This looks very similar to a question I asked a few days ago... 
http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2017q3/011677.html 



dnsmasq DHCPv6 server only seems to be issuing leases on the ULA prefix 
and not on the GUA prefix when both types of addresses are configured on 
an interface.  If I remove the ULA from the network interface then 
leases are issued from the GUA range.


I am awaiting a reply to my question.


It might be worth adding 'log-dhcp' to your dnsmasq config files and get 
a bit more info as to what options dnsmasq is replying with on dhcpv6 
requests...if it's replying!


Also, a packet capture on the client machine/s provides the ultimate 
source of info on what is actually received.  Many times I've used 
'wireshark' and gone 'oh! - ooops!"


Cheers,

Kevin

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Re: [Dnsmasq-discuss] IPv6: Router with RA + static DHCPv6 from dnsmasq on separate host

2017-08-18 Thread David Kerr 
Maddes,
  This looks very similar to a question I asked a few days ago...
http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2017q3/011677.html

dnsmasq DHCPv6 server only seems to be issuing leases on the ULA prefix and
not on the GUA prefix when both types of addresses are configured on an
interface.  If I remove the ULA from the network interface then leases are
issued from the GUA range.

I am awaiting a reply to my question.

David

On Fri, Aug 18, 2017 at 9:38 AM, M. Buecher 
wrote:

> Hello dnsmasq fellows,
> Hello Simon,
>
> I want to assign additional static DHCPv6 global unicast addresses (GUA)
> to some machines (mainly servers).
> Yet I have failed to do so with dnsmasq.
>
> The GUA prefix [1] is advertised by my router "AVM FRITZ!Box 7490" [3].
> Its Router Advertisement (RA) has M-, O- and A-flag set. Priority is
> middle.
> And it is the standard gateway for Internet connections.
>
> dnsmasq 2.76 is running on a Raspberry with Raspbian 8 "Jessie" [4].
> It is the only DNSv4/v6 server in the LAN and serves the local domain.
> All other requests are forwarded by dnsmasq via IPv4 to the DNS relay of
> the router, this way those requests are resolved by the ISP's DNS servers.
> It also advertises the Unique Local Addresses (ULA) [2] for the LAN via RA
> and assigns addresses via DHCPv6 only.
> The host with dnsmasq (Raspberry) has a GUA via SLAAC by the router's RA.
>
> Test machine is Windows 10 with latest updates.
> It got its ULA via DHCPv6 from dnsmasq and has a GUA via SLAAC by the
> router's RA.
> Additionally a second GUA is present due to Windows' IPv6 privacy
> extensions for outgoing connections.
> *But* it doesn't have it's static GUA from dnsmasq!
>
> Am I missing something in my dnsmasq configuration (see below)?
> Or do I have to configure the clients in another way?
> Any other enhancements for my configuration?
>
>
> By the way:
> Does dnsmasq also send a RA for the second/GUA dhcp range? How can I avoid
> this?
> I would prefer to handle RA settings per dhcp-range via tags.
>
>
> Configuration:
> 1. File /etc/default/dnsmasq (Debian specific)
> #DOMAIN_SUFFIX=`dnsdomainname`
> #DNSMASQ_OPTS="--conf-file=/etc/dnsmasq.alt"
> ENABLED=1
> CONFIG_DIR=/etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new
> IGNORE_RESOLVCONF=yes
>
> 2. dnsmasq configuration
> # IPv4 options: router, dns, ntp
> dhcp-option=tag:lan4,3,10.0.0.254
> dhcp-option=tag:lan4,6,0.0.0.0
> dhcp-option=tag:lan4,42,10.0.0.254
>
> # IPv6 options: dns, domain
> dhcp-option=option6:dns-server,[fd00::]
> dhcp-option=tag:ula6,option6:domain-search,local.domain
>
> dhcp-authoritative
> domain-needed
> strict-order
> no-resolv
> localise-queries
> bogus-priv
> expand-hosts
> local-service
> domain=local.domain
> local=/local.domain/
> addn-hosts=/etc/hosts.static
> addn-hosts=/etc/hosts.block
> stop-dns-rebind
> rebind-localhost-ok
> dhcp-broadcast=tag:needs-broadcast
>
> server=10.0.0.254
>
> ### IPv4 range
> dhcp-range=set:lan4,10.0.0.100,10.0.0.199,255.255.255.0,12h
>
> ### IPv6 ranges
> dhcp-range=set:ula6,fd7a:d:e:f::1:0,fd7a:d:e:f::1:,64,12h
> dhcp-range=set:gua6,2003:a:b:c00::1:0,2003:a:b:c00::1:,static,64,12h
> enable-ra
>
> dhcp-host=00:50:56:39:1d:3e,10.0.0.50,[::32],test-machine
>
>
> Kind regards
> Maddes
>
>
> [1] Telekom native IPv6 Internet connection
> IPv6 prefix: 2003:a:b:c00::/56 (c|00 = 256 subnets possible)
> IPv6 adresses: 2003:a:x:y:1:2:3:4 (External IPv6 address from ISP subnet)
>
> [2] Unique Local Addresses
> ULA: fd7a:d:e:f::/64
>
> [3] Router AVM FRITZ!Box 7490
> FRITZ!OS: 06.83 (German)
> DHCPv6 for LAN: Off
> Standard-Gateway for Internet: On
> DNS via RA: Off (RFC 5006)
> RA: Enabled with M and O flag, SLAAC allowed (=A flag); DNS not advertised
> https://en.avm.de/service/fritzbox/fritzbox-7490/overview/
> https://en.avm.de/products/fritzbox/fritzbox-7490/
>
> [4] Raspberry Pi 2
> OS: Raspbian, Derivative of Debian 8 "Jessie", build from Raspberry Pi
> Foundation
> https://www.raspberrypi.org/products/raspberry-pi-2-model-b/
> https://www.raspberrypi.org/downloads/raspbian/
> https://www.raspbian.org/
>
>
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>
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[Dnsmasq-discuss] IPv6: Router with RA + static DHCPv6 from dnsmasq on separate host

2017-08-18 Thread M. Buecher 

Hello dnsmasq fellows,
Hello Simon,

I want to assign additional static DHCPv6 global unicast addresses (GUA) 
to some machines (mainly servers).

Yet I have failed to do so with dnsmasq.

The GUA prefix [1] is advertised by my router "AVM FRITZ!Box 7490" [3].
Its Router Advertisement (RA) has M-, O- and A-flag set. Priority is 
middle.

And it is the standard gateway for Internet connections.

dnsmasq 2.76 is running on a Raspberry with Raspbian 8 "Jessie" [4].
It is the only DNSv4/v6 server in the LAN and serves the local domain.
All other requests are forwarded by dnsmasq via IPv4 to the DNS relay of 
the router, this way those requests are resolved by the ISP's DNS 
servers.
It also advertises the Unique Local Addresses (ULA) [2] for the LAN via 
RA and assigns addresses via DHCPv6 only.
The host with dnsmasq (Raspberry) has a GUA via SLAAC by the router's 
RA.


Test machine is Windows 10 with latest updates.
It got its ULA via DHCPv6 from dnsmasq and has a GUA via SLAAC by the 
router's RA.
Additionally a second GUA is present due to Windows' IPv6 privacy 
extensions for outgoing connections.

*But* it doesn't have it's static GUA from dnsmasq!

Am I missing something in my dnsmasq configuration (see below)?
Or do I have to configure the clients in another way?
Any other enhancements for my configuration?


By the way:
Does dnsmasq also send a RA for the second/GUA dhcp range? How can I 
avoid this?

I would prefer to handle RA settings per dhcp-range via tags.


Configuration:
1. File /etc/default/dnsmasq (Debian specific)
#DOMAIN_SUFFIX=`dnsdomainname`
#DNSMASQ_OPTS="--conf-file=/etc/dnsmasq.alt"
ENABLED=1
CONFIG_DIR=/etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new
IGNORE_RESOLVCONF=yes

2. dnsmasq configuration
# IPv4 options: router, dns, ntp
dhcp-option=tag:lan4,3,10.0.0.254
dhcp-option=tag:lan4,6,0.0.0.0
dhcp-option=tag:lan4,42,10.0.0.254

# IPv6 options: dns, domain
dhcp-option=option6:dns-server,[fd00::]
dhcp-option=tag:ula6,option6:domain-search,local.domain

dhcp-authoritative
domain-needed
strict-order
no-resolv
localise-queries
bogus-priv
expand-hosts
local-service
domain=local.domain
local=/local.domain/
addn-hosts=/etc/hosts.static
addn-hosts=/etc/hosts.block
stop-dns-rebind
rebind-localhost-ok
dhcp-broadcast=tag:needs-broadcast

server=10.0.0.254

### IPv4 range
dhcp-range=set:lan4,10.0.0.100,10.0.0.199,255.255.255.0,12h

### IPv6 ranges
dhcp-range=set:ula6,fd7a:d:e:f::1:0,fd7a:d:e:f::1:,64,12h
dhcp-range=set:gua6,2003:a:b:c00::1:0,2003:a:b:c00::1:,static,64,12h
enable-ra

dhcp-host=00:50:56:39:1d:3e,10.0.0.50,[::32],test-machine


Kind regards
Maddes


[1] Telekom native IPv6 Internet connection
IPv6 prefix: 2003:a:b:c00::/56 (c|00 = 256 subnets possible)
IPv6 adresses: 2003:a:x:y:1:2:3:4 (External IPv6 address from ISP 
subnet)


[2] Unique Local Addresses
ULA: fd7a:d:e:f::/64

[3] Router AVM FRITZ!Box 7490
FRITZ!OS: 06.83 (German)
DHCPv6 for LAN: Off
Standard-Gateway for Internet: On
DNS via RA: Off (RFC 5006)
RA: Enabled with M and O flag, SLAAC allowed (=A flag); DNS not 
advertised

https://en.avm.de/service/fritzbox/fritzbox-7490/overview/
https://en.avm.de/products/fritzbox/fritzbox-7490/

[4] Raspberry Pi 2
OS: Raspbian, Derivative of Debian 8 "Jessie", build from Raspberry Pi 
Foundation

https://www.raspberrypi.org/products/raspberry-pi-2-model-b/
https://www.raspberrypi.org/downloads/raspbian/
https://www.raspbian.org/


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