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@hgn
hgn / tcpdump IPv6 router advertisement
Created March 16, 2015 18:59
Capture of IPv6 advertisement message via tcpdump
@virgo:~ $ sudo tcpdump -vvvv -ttt -i eth1 icmp6 and 'ip6[40] = 134'
00:00:00.000000 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 200) fe80::b675:eff:fefa:1cb > ip6-allnodes: [icmp6 sum ok] ICMP6, router advertisement, length 200
hop limit 0, Flags [managed, other stateful], pref medium, router lifetime 1800s, reachable time 0s, retrans time 0s
source link-address option (1), length 8 (1): b4:75:0e:fa:01:cb
0x0000: b475 0efa 01cb
mtu option (5), length 8 (1): 1280
0x0000: 0000 0000 0500
prefix info option (3), length 32 (4): 2a01:ffff:43f::/64, Flags [onlink, auto], valid time 7200s, pref. time 1800s
0x0000: 40c0 0000 1c20 0000 0708 0000 0000 2a01
0x0010: ffff 043f 0000 0000 0000 0000 0000
@esamattis
esamattis / unblockdns.md
Last active May 5, 2022 17:45
Transparent Netflix only region unblock with Asuswrt Merlin

Transparent Netflix only region unblock with Asuswrt Merlin

Ad-free time!, UnoTelly etc. services provide a nice way to unblock regions for Netflix and others using their custom DNS servers.

But I don't want to direct all my DNS traffic to them and I'm too lazy to manually configure all my devices (phones, tablets, media center boxes etc.). So here's how to transparently unblock Netflix for all your devices using the [Asuswrt Merlin][merlin] firmware. It's a custom router firmware which can be used on the Asus RT-N66U router for example.

Prerequisites

Enable JFFS partition and SSH login from http://<ROUTER-IP>/Advanced_System_Content.asp