https://github.com/blahgeek/bgtr

Make custom traceroute result on a single linux box.
https://github.com/blahgeek/bgtr

Last synced: about 2 months ago
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Make custom traceroute result on a single linux box.

• Host: GitHub
• URL: https://github.com/blahgeek/bgtr
• Owner: blahgeek
• Created: 2015-02-18T05:24:44.000Z (almost 10 years ago)
• Default Branch: master
• Last Pushed: 2015-02-18T05:25:27.000Z (almost 10 years ago)
• Last Synced: 2023-06-06T15:36:21.483Z (over 1 year ago)
• Language: Python
• Homepage: http://blog.blahgeek.com/bgtr/
• Size: 289 KB
• Stars: 11
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md

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README

        
# bgtr

Make custom traceroute result on a single linux box.

![](happy.2015.png)

For more details, see [My Blog](http://blog.blahgeek.com/bgtr/) (Chinese)

## Try it

```

mtr -6 happy.2015.blahgeek.com

```

## Howto

- Get a `/64` IPv6 pool, with rDNS support

- Using `ip6tables ... -j NFQUEUE` to queue specific packets to user space

- Drop those whose `hop limit` is less than NUM and send back an `Time Exceeded` ICMPv6 message, accept others

## Step-by-step Howto

- Goto [Tunnel Broker](http://tunnelbroker.net), register an tunnel, configure it. For me, `2001:470:1f05:42c::/64` is routed to my VPS.

- Pick a destination IP address, let's say `2001:470:1f05:42c:2015::`. Run:

```

ip6tables -t nat -I PREROUTING -d 2001:470:1f05:42c:2015:: -j NFQUEUE --queue-num 1

```

  So that all packets to `2001:470:1f05:42c:2015::` will be queued to user space (queue 1).

- Install python requirements: `pip install NetfilterQueue scapy`

- Run `main.py` on root. Change `PREFIX=` to your own IPv6 prefix.

Now, try run `mtr 2001:470:1f05:42c:2015::` from another machine and see the result. And finally you may want to make it prettier:

- Set *rDNS Delegations* to *dns.he.net* at Tunnel Broker, goto [HE.net DNS](http://dns.he.net) to setup rDNS for each address.

- Bind `2001:470:1f05:42c:2015::` to a domain like `happy.2015.blahgeek.com`