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Newbie: Help Needed with BT Business Broadband Fibre connection to OPNsense:
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Topic: Newbie: Help Needed with BT Business Broadband Fibre connection to OPNsense: (Read 223 times)
revlmh
Newbie
Posts: 3
Karma: 0
Newbie: Help Needed with BT Business Broadband Fibre connection to OPNsense:
«
on:
September 20, 2024, 01:38:50 am »
Hi all. I am certainly a newbie to networking but not a novice regarding software and PC-building. I wanted to build a home router using an older pc (i7-4790), 8 cores, so older but has plenty of capability. I am using the on-board motherboard and a separate Realtec card - no problems with setup etc. I have exhausted the BT-related walkthroughs (not just BT) on YouTube. I am confident that the router is set up right - I can get to the GUI from the LAN port and go through the wizard. The WAN looks to be configured correctly (I used autodetection). Here is a summary. I would welcome any help...It could be something simple.
BT fibre lead (that would go into the business router now goes into a modem), and the WAN lead goes from the (Draytek) modem to the WAN port on the router (old PC)..I am aware that this could be a newbie simple problem I have missed
... No Internet Connection: Despite the PC recognizing the Ethernet link as “Network - no internet" rather than 'Network unidentified; there’s errr...no internet access.
BT Support: BT suggested that the generic username (originally given when I first subscribed, and used for years) might be for testing purposes. They provided a new username, but the issue persists. BT were pretty unhelpful apart from this but an engineer back in the UK suggested using a Draytek modem.
Router Mode: The BT usernames and passwords work when the modem is in router mode, whether using a Draytek or TP-Link router. (The Draytek comes set in bridge mode but it can act as a modem-router).
Settings PPPOE, MTU 1492. MSS 1452, VLAN tag attached to WAN port of 101.
Troubleshooting Steps Taken:
Switched out ethernet cables - cable came with modem.
Attempted generic usernames and passwords (thanks Sheridan Computers YouTube) for BT business hub, and BT homehub - no success.
DNS Settings: Configured DNS servers manually.
Gateway Configuration: Verified WAN gateway setup - gateway is up.
NAT Configuration: Ensured NAT is enabled - Automatic outbound
Diagnostics: Used OPNsense diagnostic - Ping to 8.8.8.8 does not return.
Firewall Rules: Checked firewall rules to allow traffic from LAN to WAN.
Despite these steps, I still can’t get the internet connection to work. Any advice or suggestions would be greatly appreciated! Wondering if this could be hardware - but wary of spending any more money.
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Last Edit: September 20, 2024, 02:05:20 am by revlmh
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bartjsmit
Hero Member
Posts: 1969
Karma: 193
Re: Newbie: Help Needed with BT Business Broadband Fibre connection to OPNsense:
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Reply #1 on:
September 20, 2024, 08:13:37 am »
First off - this is not fibre, no matter what BT sales and marketing tries to tell you. It sounds more like FTTC or VDSL and the Draytek is an excellent first step
Would this be a 130 by any chance?
The Realtek is a niggle but if OPNsense sees the Ethernet interface you should be fine. Your basics look to be in good shape.
Your first point of call is the PPP log:
Interfaces: Point-to-Point: Log File
It's not a given that you will have PPPoE. There is DHCP in VDSL as well (*cough* Sky *cough*). Play around with option 61 for a laugh.
Bart...
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revlmh
Newbie
Posts: 3
Karma: 0
Re: Newbie: Help Needed with BT Business Broadband Fibre connection to OPNsense:
«
Reply #2 on:
September 20, 2024, 12:24:58 pm »
Thanks Bart... much appreciated. Good to know my basic setup is okay. I tried to play around with other options - no luck. Yes, it is VDSL - and it is a Draytek 160 router. I called up the PPP log and got nothing. I have tried to play around with option 61 - i.e., going to DHCP - but I am pretty clueless here. I have a table of values from BT - Broadband IP address, Default Gateway, and Primary and Secondary DNS for the old router, but I do not quite know what I am doing with these! I am at Network for Idiots chapter one but am picking things up pretty quickly I think. Could you be a bit more specific
One thing - I ditched the idea of managing the PPPoE through the Draytek, just for a test, fixed the cable to the old router (a cheap TP-Link that has been really faithful), checked the connection to a laptop - no problem - internet over ethernet fine. However, when I take the same cable and plug it as the WAN into the new-built router, I get nothing - when I work through the wizard again. I think I should be getting double NAT.
I am wondering if this points to a hardware issue - although the WAN is coming through to a motherboard ethernet port...I have tried switching to no avail.
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bartjsmit
Hero Member
Posts: 1969
Karma: 193
Re: Newbie: Help Needed with BT Business Broadband Fibre connection to OPNsense:
«
Reply #3 on:
September 20, 2024, 02:13:23 pm »
Are you sure the Draytek is in modem mode? Boot your laptop off a live Ubuntu USB drive and see what appears on the ethernet port. You can make a PPP connection from the GUI:
https://www.linuxbabe.com/ubuntu/create-pppoe-connection-ubuntu-16-04
You may get away with double NAT but you must tell OPNsense that your WAN has an RFC1918 IP:
Interfaces:WAN:Block private IP
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revlmh
Newbie
Posts: 3
Karma: 0
Re: Newbie: Help Needed with BT Business Broadband Fibre connection to OPNsense:
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Reply #4 on:
September 20, 2024, 06:44:24 pm »
Thanks. Installed Ubuntu dual boot anyway - ran network manager by command line. Worked through the options. Modem not recognized - apologies did not screen grab but it would not progress. No option to put in a username and password - which is does when it detects even a wireless connection.
Checked Draytek - it is in bridge mode....
mmmm...
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bartjsmit
Hero Member
Posts: 1969
Karma: 193
Re: Newbie: Help Needed with BT Business Broadband Fibre connection to OPNsense:
«
Reply #5 on:
Today
at 08:43:06 am »
Yikes! Factory reset of the modem is the next step, I guess. Did you tag your laptop ethernet with VLAN 101? I think the theory is that you access the Draytek web GUI on the base interface and do your WAN traffic over VLAN 101.
I remember a BT specific firmware for the 130 and a whole bunch of options that took a bit of googling. Obvious ones were PPPoE rather than PPPoA. Most will not apply in bridge mode.
Keep a keen eye on the lights - ACT blinking for activity and DSL steady on for a link are what you want to see.
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Newbie: Help Needed with BT Business Broadband Fibre connection to OPNsense: