[Freeswitch-users] MultiNAT
Russell Treleaven
rtreleaven at bunnykick.ca
Thu Jul 24 21:28:51 MSD 2014
I think a topology map would be of benefit.
Just to be clear the alias mentioned earlier is not a function of
freeswitch.
have a look at
https://wiki.debian.org/NetworkConfiguration#Multiple_IP_addresses_on_One_Interface
Most operating systems can have multiple ip addresses per interface.
On Thu, Jul 24, 2014 at 12:58 PM, Kurtis Heimerl <kheimerl at cs.berkeley.edu>
wrote:
> To do that we'd have to move the actual VPN onto the same box as
> FreeSWITCH, which is again a bad architectural concern.
>
> Sounds like there's no way to dynamically shift the ext-rtp-ip in the
> dialplan. Bummer.
>
>
> On Thu, Jul 24, 2014 at 4:31 AM, Steven Ayre <steveayre at gmail.com> wrote:
>
>> Would it be possible to eliminate the NAT at the VPN making it a normal
>> router and then have the servers listen on both 198.168.*.* and X.Y.*.*?
>> You could then have 2 SIP profiles with different external IPs configured
>> (indeed the VPN wouldn't even need that setting).
>>
>>
>> On 24 July 2014 01:40, Kurtis Heimerl <kheimerl at cs.berkeley.edu> wrote:
>>
>>> It's doable, but inelegant as I'd have to push some core configuration
>>> into the NAT itself to enable it (the port forwarding).
>>>
>>>
>>> On Wed, Jul 23, 2014 at 5:35 PM, William King <
>>> william.king at quentustech.com> wrote:
>>>
>>>> I'd be curious if having two profiles(each with their own external ip
>>>> configurations) would be the best way to handle this. Then you can in
>>>> your dialplan choose which profile to send the calls out, and the NAT
>>>> would still be handled properly for that route.
>>>>
>>>> William King
>>>> Senior Engineer
>>>> Quentus Technologies, INC
>>>> 1037 NE 65th St Suite 273
>>>> Seattle, WA 98115
>>>> Main: (877) 211-9337
>>>> Office: (206) 388-4772
>>>> Cell: (253) 686-5518
>>>> william.king at quentustech.com
>>>>
>>>> On 07/23/2014 04:43 PM, Kurtis Heimerl wrote:
>>>> > If the answer is no, the answer is no. I *think* I may be able to port
>>>> > forward 5060->5090 or something in the VPN NAT to enable a new
>>>> profile,
>>>> > but I'm concerned about the reverse direction. Either way, it's not a
>>>> > scalable solution, so I'd prefer to set the return ips in the dialplan
>>>> > if able.
>>>> >
>>>> >
>>>> > On Wed, Jul 23, 2014 at 4:29 PM, Brian West <brian at freeswitch.org
>>>> > <mailto:brian at freeswitch.org>> wrote:
>>>> >
>>>> > This scenario is going to be a hard one to solve due to that...
>>>> let
>>>> > me think about it.
>>>> >
>>>> >
>>>> > On Wed, Jul 23, 2014 at 2:40 PM, Kurtis Heimerl
>>>> > <kheimerl at cs.berkeley.edu <mailto:kheimerl at cs.berkeley.edu>>
>>>> wrote:
>>>> >
>>>> > Hrm, this is more complicated to explain than I anticipated.
>>>> >
>>>> > Basically, this is the fault of VPNs. We have one machine in
>>>> our
>>>> > data center that is running a VPN connecting (X.Y.*.*) to
>>>> > carrier 1. That box is one-to-one NATing all communciations to
>>>> > our (FS) VoIP server on the local subnet (192,168.*.*). So
>>>> > that's NAT 1.
>>>> >
>>>> > The second NAT is for the actual public access from our VoIP
>>>> > box. This has a public IP outside the firewall (A.B.*.*) and
>>>> > NATs again to the VoIP server on the local subnet
>>>> (192.168.*.*)
>>>> >
>>>> > So, this one machine (192.168.*.*) is actually behind two
>>>> > separate NATs at the moment. It has some rules in the IP
>>>> tables
>>>> > to route X.Y traffic to the VPN box, and otherwise route to
>>>> the
>>>> > broader internet. The existing way to deal with a NAT in FS is
>>>> > the ext-rtp/sip-ip field in the profile, but that no longer
>>>> > works when we have to dynamically set these fields depending
>>>> on
>>>> > which NAT they are going through.
>>>> >
>>>> > Does that make sense? Even if not, here's the problem: I want
>>>> to
>>>> > set ext-rtp/sip-ip dynamically in the dialplan. Is that
>>>> possible?
>>>> >
>>>> >
>>>> > On Wed, Jul 23, 2014 at 5:40 AM, Brian West
>>>> > <brian at freeswitch.org <mailto:brian at freeswitch.org>> wrote:
>>>> >
>>>> > I'm guessing both networks are behind the same nat and
>>>> > routed? Or is it two different nat'ed networks behind the
>>>> > same public IP? If its just two standard networks thats
>>>> > fully routed and no nat between the 192.x and the 10.x
>>>> space
>>>> > then just set your local-network-acl to rfc1918.auto.
>>>> >
>>>> >
>>>> > On Wed, Jul 23, 2014 at 12:52 AM, Kurtis Heimerl
>>>> > <kheimerl at cs.berkeley.edu <mailto:
>>>> kheimerl at cs.berkeley.edu>>
>>>> > wrote:
>>>> >
>>>> > Comments in line:
>>>> >
>>>> >
>>>> > On Tue, Jul 22, 2014 at 9:22 PM, Pasha
>>>> > <pasha at prosperity4ever.com
>>>> > <mailto:pasha at prosperity4ever.com>> wrote:
>>>> >
>>>> > The problem with that though (if I understand your
>>>> > scenario correctly) is that even if there was a
>>>> way
>>>> > to set external IP in freeswitch in the dial plan
>>>> > you say that you only have 1 external IP to deal
>>>> > with anyway, so what would you set your second IP
>>>> to
>>>> > for routing to work properly?
>>>> >
>>>> > There's only one actual IP on the box, but it's behind
>>>> > *two* different NATs. Setting the ext-rtp/sip-ip to
>>>> the
>>>> > appropriate NAT IP works for both connections, but I
>>>> > need to make that dynamic.
>>>> >
>>>> >
>>>> > In my mind what might work for you is if you
>>>> create
>>>> > an alias to your single network controller with
>>>> the
>>>> > second IP that you need, then if you have access
>>>> to
>>>> > the firewall perform NAT so that if connection
>>>> comes
>>>> > in from external IP of vendor #1 on 5060 you
>>>> forward
>>>> > that to 5060 on internal IP 1 of your fresswitch
>>>> > box. If call comes in on external IP of vendor #2
>>>> on
>>>> > 5060 you forward to port 5060 of your internal IP
>>>> #2
>>>> > (alias on freeswitch box)... that's for
>>>> incoming...
>>>> >
>>>> >
>>>> > I'm not sure I understand this. Does a FS alias allow
>>>> me
>>>> > to have multiple IPs on the same box somehow?
>>>> >
>>>> >
>>>> > I apologize if I didn't fully understand your
>>>> > scenario. I'm not even sure why you're having a
>>>> > conflict in this case because your providers are
>>>> > different, the only time you have an issue with
>>>> > single external IP is if you're trying to setup a
>>>> > second trunk to the same provider (most of them
>>>> > won't allow more than on trunk on a single IP).
>>>> >
>>>> >
>>>> > It's a relatively simple, but apparently uncommon,
>>>> case,
>>>> > I agree. My issue sounds very similar to having
>>>> multiple
>>>> > trunks to the same provider in a way, but I have
>>>> > different external IPs for RTP and such instead.
>>>> >
>>>> >
>>>> > Paul
>>>> >
>>>> >
>>>> > On 14-07-22 05:28 PM, Kurtis Heimerl wrote:
>>>> >> I can't do that unfortunately. Our providers are
>>>> >> hitting the generic SIP Port: 5060 so that's not
>>>> >> available. Our system behind the two NATs has
>>>> only
>>>> >> one network interface, and as such only one
>>>> >> available public IP. So we can't just set up a
>>>> new
>>>> >> profile. I can probably hack around this in
>>>> >> another way (port forwarding through one of the
>>>> >> NATs to allow a second profile on the same IP)
>>>> but
>>>> >> that's pretty ugly and unsustainable going
>>>> >> forward. I'd much prefer to simply set the
>>>> >> expected external IP in the outbound dialplan for
>>>> >> each provider.
>>>> >>
>>>> >>
>>>> >> On Tue, Jul 22, 2014 at 5:07 PM, Russell
>>>> Treleaven
>>>> >> <rtreleaven at bunnykick.ca
>>>> >> <mailto:rtreleaven at bunnykick.ca>> wrote:
>>>> >>
>>>> >> Either give them separate ip addresses or
>>>> >> separate ports.
>>>> >>
>>>> >>
>>>> >> Sent from my BlackBerry® PlayBook™
>>>> >> www.blackberry.com <
>>>> http://www.blackberry.com>
>>>> >>
>>>> >>
>>>> ------------------------------------------------------------------------
>>>> >> *From:* "Kurtis Heimerl"
>>>> >> <kheimerl at cs.berkeley.edu
>>>> >> <mailto:kheimerl at cs.berkeley.edu>>
>>>> >> *To:* "FreeSWITCH Users Help"
>>>> >> <freeswitch-users at lists.freeswitch.org
>>>> >> <mailto:
>>>> freeswitch-users at lists.freeswitch.org>>
>>>> >> *Sent:* 22 July, 2014 8:04 PM
>>>> >> *Subject:* Re: [Freeswitch-users] MultiNAT
>>>> >>
>>>> >> They all have to sit on the same internal IP
>>>> >> and Port, so I don't think I can.
>>>> >>
>>>> >>
>>>> >> On Tue, Jul 22, 2014 at 4:57 PM, Russell
>>>> >> Treleaven <rtreleaven at bunnykick.ca
>>>> >> <mailto:rtreleaven at bunnykick.ca>> wrote:
>>>> >>
>>>> >> Hi Kurtis,
>>>> >>
>>>> >> Why not make a separate profile for each
>>>> >> provider?
>>>> >>
>>>> >> Sent from my BlackBerry® PlayBook™
>>>> >> www.blackberry.com <
>>>> http://www.blackberry.com>
>>>> >>
>>>> >>
>>>> ------------------------------------------------------------------------
>>>> >> *From:* "Kurtis Heimerl"
>>>> >> <kheimerl at cs.berkeley.edu
>>>> >> <mailto:kheimerl at cs.berkeley.edu>>
>>>> >> *To:* "FreeSWITCH Users Help"
>>>> >> <freeswitch-users at lists.freeswitch.org
>>>> >> <mailto:
>>>> freeswitch-users at lists.freeswitch.org>>
>>>> >> *Sent:* 22 July, 2014 7:14 PM
>>>> >> *Subject:* [Freeswitch-users] MultiNAT
>>>> >>
>>>> >> Hey Users,
>>>> >>
>>>> >> I have an interesting NAT setup. I'm
>>>> >> running FS on the inside of our network
>>>> as
>>>> >> a router/proxy between some SIP phones
>>>> and
>>>> >> DID providers. However, each DID provider
>>>> >> is behind a *different* NAT (a property
>>>> of
>>>> >> our VPN setups for them).
>>>> >>
>>>> >> For instance: DID1 is at IP 192.168.1.1
>>>> >> and DID2 is at 10.0.0.1.
>>>> >>
>>>> >> I have calls working for each of them
>>>> when
>>>> >> I set the following in my external
>>>> profile:
>>>> >>
>>>> >> <param name="ext-rtp-ip"
>>>> value="10.0.0.2"/>
>>>> >> <param name="ext-sip-ip"
>>>> value="10.0.0.2"/>
>>>> >>
>>>> >> However, I need to dynamically route
>>>> >> between *both* of them. I need a
>>>> mechanism
>>>> >> for setting ext-rtp-ip and ext-sip-ip in
>>>> >> the dialplan itself!
>>>> >>
>>>> >> Is there a set way to do this?
>>>> >>
>>>> >> Thanks!
>>>> >>
>>>> >>
>>>> _________________________________________________________________________
>>>> >> Professional FreeSWITCH Consulting
>>>> Services:
>>>> >> consulting at freeswitch.org
>>>> >> <mailto:consulting at freeswitch.org>
>>>> >> http://www.freeswitchsolutions.com
>>>> >>
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>>>> >>
>>>> >>
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>>>> >>
>>>> >>
>>>> >>
>>>> _________________________________________________________________________
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>>>> >>
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>>>> >>
>>>> >>
>>>> _________________________________________________________________________
>>>> >> Professional FreeSWITCH Consulting Services:
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>>>> >>
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>>>> >
>>>> _________________________________________________________________________
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>>>> >
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>>>> >
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>>>> >
>>>> > --
>>>> >
>>>> > */Brian West/*
>>>> > brian at freeswitch.org <mailto:brian at freeswitch.org>
>>>> >
>>>> >
>>>> > */Twitter: @FreeSWITCH , @briankwest/*
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>>>> >
>>>> >
>>>> _________________________________________________________________________
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>>>> >
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>>>> Server
>>>> >
>>>> >
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>>>> >
>>>> >
>>>> >
>>>> >
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>>>> > --
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>>>> > */Brian West/*
>>>> > brian at freeswitch.org <mailto:brian at freeswitch.org>
>>>> >
>>>> >
>>>> > */Twitter: @FreeSWITCH , @briankwest/*
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>>>> >
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>>>> > | *ISN:*410*543 | *Skype:*briankwest
>>>> >
>>>> >
>>>> >
>>>> _________________________________________________________________________
>>>> > Professional FreeSWITCH Consulting Services:
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>>>> > http://www.freeswitchsolutions.com
>>>> >
>>>> >
>>>> >
>>>> >
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>>>> >
>>>> >
>>>> >
>>>> >
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>>>>
>>>>
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>>>
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>>>
>>>
>>>
>>>
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>>
>> _________________________________________________________________________
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>> http://www.freeswitchsolutions.com
>>
>>
>>
>>
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>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
>
>
>
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