Re: Configuring pppd to accept link-local IPv6 interface id from remote peer

>> Looking at the git master branch, it looks like Pali Rohár is actively
>> working in this space:
>>
>> https://github.com/paulusmack/ppp/commits/master
> Well, I'll give a look to find what's wrong.


Just a quick follow up to say that it is all working fine after I 
upgraded to version 2.4.9 of pppd.

I had initially been using version 2.4.7, that came with Raspberry Pi OS 
(buster).
I had also been testing using git master of the ppp repo on the 'client'.

But I hadn't tried upgrading the 'server' (the peer configured with the 
interface identifiers).
After upgrading to 2.4.9 on the 'server' it works perfectly - even with 
an older version of pppd on the 'client'.
I haven't tracked down the commit that fixed it but I guess it was 
something to do with failing to Nack the random interface identifier 
sent by the peer.

Thank you for your help and thoughts on the issue.


nick.


|pppd file ./ppp-options ipv6cp-accept-local /dev/ttyAMA0 115200 using 
channel 368 Using interface ppp0 Connect: ppp0 <--> /dev/ttyAMA0 sent 
[LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x7f793cbe>] rcvd [LCP ConfReq 
id=0xb <asyncmap 0x0> <magic 0xecde7250>] sent [LCP ConfAck id=0xb 
<asyncmap 0x0> <magic 0xecde7250>] rcvd [LCP ConfReq id=0xb <asyncmap 
0x0> <magic 0xecde7250>] sent [LCP ConfAck id=0xb <asyncmap 0x0> <magic 
0xecde7250>] rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x7f793cbe>] 
sent [LCP EchoReq id=0x0 magic=0x7f793cbe] sent [IPV6CP ConfReq id=0x1 
<addr fe80::0dfd:3c3b:e130:91ce>] rcvd [LCP EchoReq id=0x0 
magic=0xecde7250] sent [LCP EchoRep id=0x0 magic=0x7f793cbe] rcvd [LCP 
EchoRep id=0x0 magic=0xecde7250] rcvd [IPV6CP ConfReq id=0xb <addr 
fe80::0000:0000:0000:0001>] sent [IPV6CP ConfAck id=0xb <addr 
fe80::0000:0000:0000:0001>] rcvd [IPV6CP ConfNak id=0x1 <addr 
fe80::0000:0000:0000:0002>] sent [IPV6CP ConfReq id=0x2 <addr 
fe80::0000:0000:0000:0002>] rcvd [IPV6CP ConfAck id=0x2 <addr 
fe80::0000:0000:0000:0002>] local LL address fe80::0000:0000:0000:0002 
remote LL address fe80::0000:0000:0000:0001 Script /etc/ppp/ipv6-up 
started (pid 7049) Script /etc/ppp/ipv6-up finished (pid 7049), status = 
0x0 |