The solution to the NAT issues is simply to use IPv6 and not worry about NAT.
Yes, that’s what I do. Andrews and Arnold offer SIP over ipv6 in the UK (and probably further afield).
Building a Personal VoIP System
61–70 of 150 posts
Re: Building a Personal VoIP System
#62> Use a SIP Application Layer Gateway. This is a horrible feature offered by some routers. Basically, it deep-packet-inspects your SIP traffic, rewrites the headers, and creates port forwards on-the-fly to make sure the inbound audio stream makes its way to your device. SIP ALGs are a total hack and notoriously buggy. Yes, these hacky ALG features also allowed internet users to access internal IPs on arbitrary servic…
This was on by default on a consumer router that was used at a small office. Their VoIP phones would get phantom calls until I discovered this and disabled it.
Woah, good find. How did you actually find out that this was happening? Network captures?
When was this approximately? I’m wondering how widespread this (still) is.
Re: Building a Personal VoIP System
#63Any recomendable sip Clients for iPhones to Connect to such a system?
Acrobits Groundwire. Counterpath’s Bria Mobile. These use push notifications for incoming calls. That way there’s no missed calls because the operating system killed the app or battery drain caused by keeping the app running.
Re: Building a Personal VoIP System
#64So, maybe one of the VoIP experts that showed up on this thread can help me with one doubt... Let's say that I have a LDAP server where I manage user accounts, and I want people to be able to call each other with any SIP-enabled phone. I am not interested in voicemail/IVRs/any type of "voice application" on top of that. Do I really need Asterisk/FreeSWITCH or can I just go buy by setting up something like Kamailio?
Kamailio is what is called a Session Border Controller. Its primary purpose is to provide protection and some lightweight filtering for the media servers/PBXs behind it. Once you want "advanced" features like voicemail, parking, hunt groups, three-way calling, etc, you will need to use a PBX like FreeSWITCH (recommended) or Asterisk (not) behind it anyway. If you're only running a single machine, an SBC isn't really worth the trouble.
Re: Building a Personal VoIP System
#65Ah good memories! Even though I knew nothing about VoIP I installed, years ago, one at my wife's little SME using "RasPBX" (a distro made of Raspbian + FreePBX + Asterisk) running on a... Raspberry Pi 1 (maybe a Pi 2 but I'm pretty sure it was a 1). The Pi was booting from the SD card but everything was running on an external HDD. I did put six Cisco VoIP phones and all was working fine as long as no more than four p…
I have a tangentially related problem I have been battling with that you may be able to help me with. I'm moving overseas (Australia to Denmark) and would like to keep my current mobile phone number working for calls and SMS , but use it from afar. I would be able to leave a raspberry pi at a friend's house. Can you use this setup without a SIP provider? Would you need to buy a modem for the raspberry pi?what would y…
I've never done it, but look into chan_mobile and a bluetooth dongle to connect a mobile (with your SIM) to asterisk running on a Pi at your friend's place.
Re: Building a Personal VoIP System
#66People still actually make phone calls? I mean its neat that you can run your own voip, but I struggle to imagine it getting used much or being worth even $5/month
People still read newspapers, ride horses, plant crops by hand, and dress up for renaissance faires.
Re: Building a Personal VoIP System
#67Ah good memories! Even though I knew nothing about VoIP I installed, years ago, one at my wife's little SME using "RasPBX" (a distro made of Raspbian + FreePBX + Asterisk) running on a... Raspberry Pi 1 (maybe a Pi 2 but I'm pretty sure it was a 1). The Pi was booting from the SD card but everything was running on an external HDD. I did put six Cisco VoIP phones and all was working fine as long as no more than four p…
I have a tangentially related problem I have been battling with that you may be able to help me with. I'm moving overseas (Australia to Denmark) and would like to keep my current mobile phone number working for calls and SMS , but use it from afar. I would be able to leave a raspberry pi at a friend's house. Can you use this setup without a SIP provider? Would you need to buy a modem for the raspberry pi?what would y…
I would just port my number to twilio and use/write a really basic twilio mobile app. It's a bit risky to rely on a slightly cobbled hardware/software setup that is sitting across the world with no physical access.
Re: Building a Personal VoIP System
#68So, maybe one of the VoIP experts that showed up on this thread can help me with one doubt... Let's say that I have a LDAP server where I manage user accounts, and I want people to be able to call each other with any SIP-enabled phone. I am not interested in voicemail/IVRs/any type of "voice application" on top of that. Do I really need Asterisk/FreeSWITCH or can I just go buy by setting up something like Kamailio?
Kamailio is what is called a Session Border Controller. Its primary purpose is to provide protection and some lightweight filtering for the media servers/PBXs behind it. Once you want "advanced" features like voicemail, parking, hunt groups, three-way calling, etc, you will need to use a PBX like FreeSWITCH (recommended) or Asterisk (not) behind it anyway. If you're only running a single machine, an SBC isn't really…
> Once you want "advanced" features like voicemail, parking, hunt groups, three-way calling.
Right, but what I am saying is that I don't want any of those features. At least not yet.
I just want to give my customers a sip address (username@communick.com) where they can call other SIP addresses. In that case, is that a PBX still needed?
Re: Building a Personal VoIP System
#69Ah good memories! Even though I knew nothing about VoIP I installed, years ago, one at my wife's little SME using "RasPBX" (a distro made of Raspbian + FreePBX + Asterisk) running on a... Raspberry Pi 1 (maybe a Pi 2 but I'm pretty sure it was a 1). The Pi was booting from the SD card but everything was running on an external HDD. I did put six Cisco VoIP phones and all was working fine as long as no more than four p…
I've been working with bespoke VOIP/asterisk systems for a decade, I have one bit of advice to add - consider toll fraud. Especially for a system accessible from the internet. If an attacker can figure out how to make calls through your PBX, they can rack up tens of thousands of dollars in tolls over the course of a night.
Most of the integrated FOSS solutions come with fail2ban already configured, it is essential. If you want more peace of mind, a prepaid trunk helps. That means you charge up your sip trunk account, and if someone drains it, it just stops working instead of continuing to drain your bank account.
You can also limit international calling on your trunks, which effectively nullifies the financial drain of this kind of attack (though it's still obviously bad if an attacker can access your system in any way)
Re: Building a Personal VoIP System
#70Having gone down this road many times with freepbx, asterisk, etc.. I ultimately settled on just using voip.ms and connecting phones/sip clients directly to their internal sub-accounts with voicemail. They have enough features for most users so you don't need to worry about running your own PBX.
Same here. 3 businesses, only 1 problem in 10 years. The only thing I have to add: if you need to make telephone calls, the call quality using a SIP phone is much better than using a softphone.
This isn't necessarily true, a computer can speak SIP too, with a good headset it's just as good.