Mikrotik Router. IPv6 ok. No IPv4...

Forums › 2degrees (including Slingshot, Orcon, Flip, Stuff Fibre, MyRepublic, 2talk and Vocus) › Mikrotik Router. IPv6 ok. No IPv4...

Classified

12 posts

Geek

ID Verified

#306388 18-Jul-2023 11:56

Background:

I used to be with Slingshot but 2degrees offered a good deal and Slingshot was going to up their prices so no brainer. With Slingshot I used to use PPPOE through VLAN10 and it was robust. DHCP through VLAN for IPv6 and it was all well and working.

Issue:

Yesterday I got rid of PPPOE legacy connection and created a DHCP client interfacing VLAN10. Changed all the applicable firewall rules and NAT to point to VLAN10 (as it used to be pointed to the PPPOE client).
Some websites work like apple.com and geekzone.co.nz which are IPv6 sites load perfectly fine but some websites like asb.co.nz I'm assuming IPv4 only sites fail to load. So I checked whatsmyipaddress.com and it showed that I had a valid IPv6 address but no IPv4 address detected.

Strange thing is the DHCP client is able to see the 2degrees DHCP server and is able to obtain an IP address.

Other possible relevant info: MTU is at 1500, DNS is using cloudflare's which is 1.1.1.1, 1.0.0.1.

What am I doing wrong haha.

michaelmurfy

meow
13242 posts

Uber Geek

Moderator

ID Verified

Trusted

Lifetime subscriber

#3105477 18-Jul-2023 12:03

Check your NAT Masquerade rule and ensure your WAN interface is tagged as WAN.

Michael Murphy | https://murfy.nz
Referral Links: Quic Broadband (use R122101E7CV7Q for free setup)

Are you happy with what you get from Geekzone? Please consider supporting us by subscribing.
Opinions are my own and not the views of my employer.

Classified

12 posts

Geek

ID Verified

#3105485 18-Jul-2023 12:14

michaelmurfy:

Check your NAT Masquerade rule and ensure your WAN interface is tagged as WAN.

I've removed most of the default config when I set it up including WAN and LAN tagging etc.

Masquerade rule is:

chain=srcnat
out. interface=ether1-vlan10
action=masquerade

in ether1-vlan10, settings are:

mtu=1500
vlan id=10
interface=ether1-gateway

and physical output of ether1 goes to the ONT.

michaelmurfy

meow
13242 posts

Uber Geek

Moderator

ID Verified

Trusted

Lifetime subscriber

#3105499 18-Jul-2023 12:44

I mean, your VLAN interface should be in the WAN interface group.

Classified

12 posts

Geek

ID Verified

#3105516 18-Jul-2023 13:31

michaelmurfy:

I mean, your VLAN interface should be in the WAN interface group.

Sorry I'm not sure that I'm understanding what you're saying.

I got rid of interface groups. I've got a bridge-local for my LAN and VLAN10 is is not part of any group..

Anyhow, I did a router reset (which should have LAN and WAN interface groups) and did the whole DHCP client through VLAN10 thing, removed ether1 and added VLAN10 into the WAN group but still not working. DHCP client is working though. It's got an IP address. NAT masquerade is interfacing WAN. Is this all correct?

michaelmurfy

meow
13242 posts

Uber Geek

Moderator

ID Verified

Trusted

Lifetime subscriber

#3105520 18-Jul-2023 13:38

Got another router to test also?

It sounds like your configuration should work but also there are so many things you could potentially miss.

I'd ensure your router is on the latest version of RouterOS too. Being DHCP, it is pretty easy to get running assuming your interface is in the WAN group. Sounds like to me the masquerade rule is not working or the default route is not being added.

Also goes without saying ensure DHCP is listening on the WAN (VLAN) interface and add default route is set:

Classified

12 posts

Geek

ID Verified

#3105948 19-Jul-2023 13:56

I plugged in the supplied router instead and at first go DHCP didn't work until it asked me for PPPOE credentials. I punched those in and now we have a connection. Strange that 2degrees advertise connection via DHCP but actually that is not correct. Unless it's just me that's having the issue...

Changed back to my Mikrotik router and set up PPPOE again and it's fine. Oh well. Crisis adverted.

Classified

12 posts

Geek

ID Verified

#3105965 19-Jul-2023 15:14

SMH. It was working fine for like 14 hours and now IPv4 just stopped working. Guess it's back to using supplied router until they give me a static IP maybe.

Quic Broadband

Move to New Zealand's best fibre broadband service (affiliate link). Note that to use Quic Broadband you must be comfortable with configuring your own router.

schmoogol

76 posts

Master Geek

ID Verified

#3106351 20-Jul-2023 18:23

Classified:

...Strange that 2degrees advertise connection via DHCP but actually that is not correct. Unless it's just me that's having the issue...

This won't help you solve your problem but I can at least confirm for you that I have had a DHCP connection working on a 2degrees supplied FritzBox and on my Mikrotik router (following michaelmurphy's stickied guide). I didn't have to enter any credentials on either router to get them up and running.