from BT fttp consumer 900mb using ipv6
root@penguin:/# mtr time.google.com --udp -P 123 -bzw
Start: 2023-10-25T17:48:47+0100
HOST: penguin Loss% Snt Last
Avg Best Wrst StDev
1. AS2856 2a00:23c8:1fa4:c401:389b:48ff:fe61:ba61 0.0% 10 0.4
0.4 0.3 0.9 0.2
2. AS2856 2a00:23c8:1fa4:c401:1e99:57ff:fe5a:aa9b 0.0% 10 1.4
1.5 1.3 1.7 0.1
3. AS??? ??? 100.0 10 0.0
0.0 0.0 0.0 0.0
from BT business but using ipv4.
[root@localhost /]# mtr time.google.com --udp -P 123 -bzw
Start: Wed Oct 25 17:42:47 2023
HOST: localhost.localdomain Loss%
Snt Last Avg Best Wrst StDev
1. AS??? gateway (192.168.2.94) 0.0%
10 0.4 0.4 0.3 0.4 0.0
2. AS??? btbusinesshub (192.168.1.254) 0.0%
10 1.8 1.8 1.6 1.9 0.0
3. AS2856 81.148.64.1 0.0%
10 6.1 6.1 5.7 6.5 0.0
4. AS2856 213.120.163.234 0.0%
10 6.2 6.5 6.1 6.8 0.0
5. AS2856 217.32.240.97 0.0%
10 6.5 6.8 6.1 9.9 1.0
AS2856 217.32.240.95
6. AS2856 213.121.192.134 0.0%
10 6.8 6.6 6.2 6.8 0.0
AS2856 core1-hu0-12-0-5.southbank.ukcore.bt.net (195.99.127.46)
AS2856 core1-hu0-16-0-9.southbank.ukcore.bt.net (213.121.192.94)
AS2856 core1-hu0-15-0-6.ukcore.bt.net (213.121.192.80)
AS2856 core1-hu0-12-0-1.southbank.ukcore.bt.net (195.99.127.30)
AS2856 host213-121-192-128.ukcore.bt.net (213.121.192.128)
AS2856 core1-hu0-2-0-5.southbank.ukcore.bt.net (195.99.127.28)
AS2856 core1-hu0-8-0-5.southbank.ukcore.bt.net (195.99.127.178)
7. AS2856 peer2-et7-0-5.slough.ukcore.bt.net (194.72.16.218) 0.0%
10 7.1 6.7 6.0 7.2 0.0
AS2856 peer3-et0-1-2.redbus.ukcore.bt.net (194.72.16.96)
AS2856 peer2-et3-0-2.slough.ukcore.bt.net (62.172.103.216)
AS2856 peer8-et-7-0-2.telehouse.ukcore.bt.net (109.159.252.100)
AS2856 peer3-et3-0-5.slough.ukcore.bt.net (194.72.16.70)
AS2856 peer3-et7-0-2.redbus.ukcore.bt.net (194.72.16.98)
AS2856 peer7-et-3-0-2.telehouse.ukcore.bt.net (109.159.252.180)
AS2856 peer3-et3-0-2.slough.ukcore.bt.net (109.159.252.82)
8. AS2856 109.159.253.237 10.0%
10 8.3 8.7 6.5 19.0 3.9
AS2856 peer2-xe3-1-3.telehouse.ukcore.bt.net (109.159.253.5)
AS2856 109.159.253.219
AS2856 109.159.253.187
AS2856 109.159.253.3
AS15169 142.250.171.140
AS2856 peer5-te0-0-0-32.telehouse.ukcore.bt.net (195.99.126.77)
AS15169 142.250.47.6
9. AS??? ??? 100.0
10 0.0 0.0 0.0 0.0 0.0
Colin
On Wed, 25 Oct 2023 at 16:54, Paul Mansfield <[email protected]>
wrote:
> this might have been a technical decision, to block udp:123 from ipv6
> sources, because of the possibility of DoS amplification, then
> executed badly?
>
> https://www.cloudflare.com/en-gb/learning/ddos/ntp-amplification-ddos-attack/
>
> but, still, one would think that Hyperoptic would have appropriate
> ingress rules on their CPEs and elsewhere to prevent spoofing, as well
> as permit udp:123 from their customers.
>
>
