New to routing: what protocol do I need?

[Alessandro Vesely]

On Tue 25/Apr/2023 12:49:13 +0200 Kevin P. Fleming wrote:
> If you are only using Bird for the radv protocol, you should probably just 
> let everything default to using the 'master6' table, and make your life 
> simpler. You can remove the 'kernel' protocol completely, change the 
> 'static' protocol and the 'radv' protocol to not specify a table name, and 
> 'show route' will give you the result you are looking for without having to 
> specify a table name.

I'm beginning to understand.  Can I use table names for policy routing?


I don't know what protocol I need.  It is a new question.  I should know what protocol is using the next hop on ppp0 (default gw).  I'm not even sure what IPv6 hosts are out there; traceroute shows nothing.  Running traceroute from an external site I find that, wherever the trace starts from, it falls into a loop:

2a00:6d42::1:0:1:36       Aruba S.p.A. (sometimes ???)
2a00:6d42:0:2:5::12            "             "
2a02:29e1::a              Seflow s.r.l. --> _my ISP_
2a02:29e0:109:ff00::5          "
2a02:29e0:255::2               "
2001:7f8:c5::a503:1034:1  Samer Abdel-Hafez (sometimes ???)

The bottom one, from Amsterdam, points back to Aruba in Italy.  One of the three 2a02:29e0/30 should point to me instead of returning "uphill".  I guess I should advertise something, but don't know how.  nmap finds nothing, but confirms those hosts are up:

597-north:bird# nmap -6 -e ppp0 -Pn -T4 --system-dns 2a02:29e1::a 2a02:29e0:109:ff00::5 2a02:29e0:255::2
Starting Nmap 7.80 ( https://nmap.org ) at 2023-04-25 18:05 CEST
Nmap scan report for 2a02:29e1::a
Host is up.
All 1000 scanned ports on 2a02:29e1::a are filtered

Nmap scan report for 2a02:29e0:109:ff00::5
Host is up.
All 1000 scanned ports on 2a02:29e0:109:ff00::5 are filtered

Nmap scan report for 2a02:29e0:255::2
Host is up.
All 1000 scanned ports on 2a02:29e0:255::2 are filtered

Nmap done: 3 IP addresses (3 hosts up) scanned in 302.54 seconds


What should I scan to find what are they listening to?  (Or maybe there are some fe80 hosts I don't see?)

My ISP say everything is fine on their side, and if I used an external router such as TP-Link, ZTE, Mikrotik or Fritz!box they have guides, but not for Linux box.  What advertisements do those routers run?  (The guides talk about DNS and DHCP, which I don't think I need.)

A few further details about this question are here:
https://unix.stackexchange.com/questions/742826/ipv6-over-pppoe


Best
Ale