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Eir VOB on a FTTH conection

  • 07-03-2025 12:04AM
    #1
    Registered Users, Registered Users 2 Posts: 6


    Hi there all. Pulling what's left of my hair out trying to get this to work.

    When I renewed by B'Band with eir, with voice, they decommissioned my copper line.

    I have my own gear so thought it would not be a problem. Data - no problem.

    Voice of Broadband - not working and have tried all possibilities, I think!

    I have the ethernet from the fibre ONT connected to the WAN port on my router.

    I tried an ethernet link from the router to both the WAN port and a LAN port on the F3000,

    but it looks like it cannot activate the voice port as the DNS would need to reconcile the 2 entries

    on the F3000 for voice gateway to the "external" eir VOIP addresses, which is not possible as they are

    not externally accessible!

    Has anyone got this to work - this being a UDM pro with eirs Talk offering over VOB?

    Tagged:


Comments

  • Registered Users, Registered Users 2 Posts: 6 Irish_John


    Anyone?



  • Registered Users, Registered Users 2, Paid Member Posts: 3,217 ✭✭✭Glaceon


    Have you tried putting a switch between your ONT and F3000/UDM Pro WAN ports? I don’t think it’ll work with the F3000 behind the UDM.



  • Registered Users, Registered Users 2 Posts: 6 Irish_John


    @Glaceon Thanks for suggestion. Yeah, I have a 2.5Gb x 5 port on order but was hoping for something a bit slicker. Not bothered with the double-natting that will result if I use a switch, but if I could figure the DNS piece out it would work using config as above. Problem is I don't have the aliases eir may (or may not!) have set-up for the internal urls.



  • Registered Users, Registered Users 2, Paid Member Posts: 3,217 ✭✭✭Glaceon


    You’ll only end up with double NAT if you connect this way:

    ONT to F3000 WAN, F3000 LAN to UDM.

    The switch would get around that because you’d connect both WAN ports to the ONT via the switch. I don’t think anyone really knows how the phone service works on these because it’s undocumented and Eir don’t provide any SIP credentials. There could be a phone VLAN involved.



  • Registered Users, Registered Users 2 Posts: 1,710 ✭✭✭KildareP


    If you do NOT have a static IP (and don't care about IPv6):

    • Leave your UDM WAN port in DHCP mode (not PPPoE) with the WAN port connected to the ONT
    • Plug the F3000 into a LAN port on the UDM and set the F3000 WAN port into PPP mode
    • The F3000 will bring up a PPPoE session through the UDM and get its own WAN IP, and the UDM will have its own separate WAN IP.

    If you DO have a static IP (or care about IPv6):

    • You will need a 5-port switch, one port connected to the ONT, with the UDM and F3000 connected to one of the other ports
    • UDM in PPPoE mode
    • F3000 in DHCP mode (which it is by default).


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  • Registered Users, Registered Users 2 Posts: 656 ✭✭✭PixelCrafter


    Would be a lot handier if they just sold a DECT phone base station or something that you could use with any router.

    I don't really see the point of their landline services as they are.



  • Registered Users, Registered Users 2 Posts: 6 Irish_John


    @KildareP Afraid not, but thanks for reply. Tried that config as per original post, the DNS is the problem as there is no way for the UDM to have a DNS entry for the SIP services, as you would on say a corporate LAN (create a DNS entry on the DCs for the IP to SIP url mapping).



  • Registered Users, Registered Users 2 Posts: 6 Irish_John


    PS using a switch does not need PPPoE as both devices will be assigned an external IP, but there is a speed overhead for this. This is only said for the benefit of anyone else looking for a solution, your reply most welcome.



  • Registered Users, Registered Users 2 Posts: 1,710 ✭✭✭KildareP


    The F3000 is not routing via the UDM, the PPPoE tunnels through it on Layer 2. It doesn’t see anything on your local LAN.

    I have this exact setup (albeit a Fritzbox into the ONT with F3000 connected through using PPPoE) and it is working fine.



  • Registered Users, Registered Users 2, Paid Member Posts: 6,515 ✭✭✭CalamariFritti


    I have an old thread about this problem. To get right to the bottom - the login credentials which you need to connect to Eir's SIP server will not be revealed to you by Eir. In fact I was told they actually dont know them themselves. They are system generated and will be pushed out to their routers via automated remote config. Both them and you can only see the encrypted credentials and entering those into your own equipment will of course not work.

    Basically what that means you cannot directly connect to Eir's SIP server with your own equipment. I'm pretty sure you can connect local VOIP devices like soft phones to your Eir router. But the first device in line to connect to Eir's SIP server must be their Eir router.

    I since have switched to digiweb who are using Fritzboxes (which I had already) but the same problem applies. They pushed a SIP config to my Fritzbox enabling voice services over broadband and I can register all sorts of VOIP devices to my Fritzbox but again the external credentials are not know to me.

    This is my old thread. I think this very much applies to your problem.


    This is Fritzbox's SIP config screen. As you can see the password is not revealed. Username is basically your full international phone number. These details were deployed by remote config and any meddling will make VOIP stop working.

    image.png
    Post edited by CalamariFritti on


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  • Registered Users, Registered Users 2, Paid Member Posts: 3,217 ✭✭✭Glaceon


    Off-topic I know, but there are tools and websites to read the configuration files exported from a Fritz, that might help you get the credentials.



  • Registered Users, Registered Users 2, Paid Member Posts: 6,515 ✭✭✭CalamariFritti


    I read the configuration but the password is a one way hash



  • Registered Users, Registered Users 2 Posts: 6 Irish_John


    Never said it was (that UDM doing routing in a switch usage scenario). The F3000 would run for sip access only, with WiFi and dhcp off.



  • Registered Users, Registered Users 2 Posts: 1,710 ✭✭✭KildareP



    Tried that config as per original post, the DNS is the problem as there is no way for the UDM to have a DNS entry for the SIP services, as you would on say a corporate LAN

    The F3000 doesn’t need anything at all on the UDM (except if the UDM blocks PPPoE from LAN-side devices) - there is no DNS entry to create because the F3000 is directly on it’s on WAN connection over PPPoE.



  • Registered Users, Registered Users 2, Paid Member Posts: 6,515 ✭✭✭CalamariFritti


    And it doesnt use a DNS name in their SIP config but an actual IP address so no DNS service needed at that point. In my case anyway and not that this should be a problem.

    Not sure tbh what the OP is trying to achieve. I thought the OP was trying to omit the Eir router altogether and use just their own hardware (except for the ONT). AFAIK this is not supported.

    I have my own gear so thought it would not be a problem. Data - no problem.

    I have the ethernet from the fibre ONT connected to the WAN port on my router.

    If the Eir router was to be first in line there shouldn't be a problem. WAN as described above and as for SIP the Eir router should be the local SIP server no?

    Post edited by CalamariFritti on


  • Registered Users, Registered Users 2 Posts: 1,710 ✭✭✭KildareP


    I'm a bit confused myself as to what they're after!

    The SIP registrar is vobb-pub.voice.eir.ie and it will only resolve using the eir DNS servers on an eir connection.

    The problem is no-one in eir genuinely can give you the auth password - it's auto-generated by their provisioning system and pushed out to the modem over TR069. All the agents see is a 32-character hash of the password - which of course does not work.

    The newer F3500 seems to display another auth password in its logs (about 12-characters) during initial boot up when TR069 is provisioning it but that seems to be hashed or truncated as it doesn't work either.

    The simple answer is - if you want VoBB landline you HAVE to use their modem for that aspect but you can use whatever you like for the internet side of things.

    Solution 1:

    • 5 port switch into the ONT and your modem and eir's into that, both grab independent WAN IPs
    • Your network connects into your own modem, only the landline connects into eir's phone port

    Solution 2 (my own case):

    • Your modem in DHCP/IPoE mode and the eir in PPPoE mode connected into a LAN port of your modem
    • Landline connects into the eir phone port


  • Registered Users, Registered Users 2, Paid Member Posts: 6,515 ✭✭✭CalamariFritti


    Thats what I thought too.

    Eircom's router has to be in play or else no VOIP/SIP. I'd use it as first in line then from there I'd connect WAN traffic directly into my own routers WAN port. Then let my own router do all the local home networking like WiFi whatnot.

    And as for SIP

    • you either simply use the Eir router for telephony - connect SIP devices like phones or soft phones to the Eir router
    • or else use the Eir router as your own local SIP server. You should be able to configure your own router as a SIP client of the Eir router. Then connect phones to your own router.
      SIP forwarding of a sort which I have not done myself tbh. Meaning I'm not 100% sure about the configuration, but AFAIK it should be absolutely possible.

    When I had that problem I tried to get the SIP credentials only to find out this was not going to happen. Reason was I wanted to use my own Fritzbox instead of the Eir router but no joy. Then I found out that digiweb uses Fritzboxes so in the end I switched to digiweb and they remote configured my SIP no problem. Not my preferred solution as I still dont know the SIP credentials for liberal use but I really didnt need to anymore and I got what I wanted in the end, the use of my Fritzbox.

    And tbh digiweb are fantastic compared to Eir who are IMO the most cheap-skating, price-gouging, worst-supported and generally clueless provider there is in Ireland. And they're not cheaper than digiweb either from what I can see.

    Edit: Not sure your solution 1 is supported. Would they allow you two WAN IP's on the same line/ONT?

    Post edited by CalamariFritti on


  • Registered Users, Registered Users 2 Posts: 1,710 ✭✭✭KildareP


    Both solutions speaking from experience - they will definitely allow 2 x WAN IPs as an eir retail customer.



  • Registered Users, Registered Users 2 Posts: 952 ✭✭✭daraghwal


    To get your SIP credentials for liberal use you can download a backup from the fritzbox (System > Backup > Save) taking note of the password, uploading into this https://www.mengelke.de/Projekte/FritzBox-JSTool , decrypting it with the password you used and searching through it for any usernames or passwords you might want including PPPoE details.



  • Registered Users, Registered Users 2, Paid Member Posts: 6,515 ✭✭✭CalamariFritti


    Wow, that seems to have worked thank you!

    I used the full php tool instead of the JST version, but it spat out an apparently decrypted config. All the passwords are correct as far I know them so I guess the SIP one will be too. Its definitely something other than the 32 byte hash.



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  • Registered Users, Registered Users 2 Posts: 6,167 ✭✭✭ZENER


    Hopefully I'm not dragging up a dead thread but having faced exactly this issue recently I thought my experience may help others here.

    I have Eir 1Gb FTTH and was supplied the F3000 router. We transferred our old copper phone line to VoIP (SIP and RTP) so the house phone connected into the RJ11 jack at the rear of the F3000.

    It was always my intention to install a UDM Pro and a couple of AC LR APs for WiFi so this is what I did.

    The F3000 phone ports don't work with the router in Bridge mode and switching back will require a call to Eir support to have the phone config re-sent to the router.

    I found a couple of useful threads on here and a Blog online and did some reading up on the SIP protocol to try get a handle on things.

    As suggested above I connected the F3000 WAN port to one of the LAN ports on the UDM. Outgoing calls worked straight away no problem but incoming calls didn't unless I made an outgoing call, incoming calls then worked for about 10 minutes afterwards then stopped. The blog said some ports needed to be forwarded to the Eir box and that it was necessary that the Eir box WAN port should be set to either a fixed IP or to DHCP (with Fixed IP set in the UDM - see below). Along with this the DNS in the WAN config in the Eir box must be set to Eirs DNS or nothing will work. You can set what ever DNS you like on the UDM.

    Once that side is done the following steps were needed. On the UDM find the F3000 in the Devices section on UniFi. In settings for the device (F3000) tick the Fixed IP Address box which will always give it the same IP. This is only if you set the Eir WAN to DHCP.

    On the UDM head to Settings and then to Port Forwarding and configure as in the pic below. The posts here and the Blog said SIP required port 6050 to be forwarded (6051 is for secure SIP) RTP requires ports 10000 to 10100 so I set all of those. Unfortunately this didn't work for me as incoming calls still never arrived.

    In the phone config on the F3000 it shows port 5080 was used to contact the Eir PBX so I forwarded that port and everything worked ! It's been 3 days now and incoming calls sill work fine.

    Screenshot 2025-09-23 at 20.52.02.png

    The UDM will obviously change the WAN IP dynamically in the above table.

    Hopefully this helps someone in a similar scenario and thanks to the posters here and to the owner of the Blog post for the valuable information.

    Cheers !



  • Registered Users, Registered Users 2 Posts: 6,167 ✭✭✭ZENER


    Corrected a port number error.



  • Registered Users, Registered Users 2 Posts: 656 ✭✭✭PixelCrafter


    Is it possible to order Eir FTTH without any voice service? I don't really need it and it's just randomly bundled with it.



  • Registered Users, Registered Users 2, Paid Member Posts: 6,515 ✭✭✭CalamariFritti


    If you dont need it then just dont use it. AFAIK you can not not have it in order to get a cheaper package or so.



  • Registered Users, Registered Users 2 Posts: 1,893 ✭✭✭Rattlehead_ie


    Life saver @ZENER , Thank you.

    Literally just deployed a UDR7 in my parents place. Had the same experience with regards the outgoing calls. I had thought that this just initiated the thing as internal calls worked after. I left happy everything was working. I didn't test 10 mins later, so I'm going to implement this now.

    Out of curiosity and if anyone is familiar with it. My parents had 2 RJ11 links in the back of the modem.

    1. Was connected to a cable that ran along the skirting and disappeared
    2. Was connected to their DECT phone

    No calls worked unless the cable in line 1 was plugged in to Eir modem. That would make me thing that's not VOIP at all and what in gods name is going on there? Just to be clear also the phone before they had swapped to FTTH came in the usual wall splitter junction box, 1 port for Standard phone line 1 port for xDSL



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