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Last change
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doc/per-user-ip: new documentation article
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| 1 | # Setting up per-user IP addresses
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| 2 |
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| 3 | If your bouncer hosts many users, you may want to assign a unique IP address for
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| 4 | each user. This allows upstream networks to easily ban a single user when a
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| 5 | misbehavior is detected, instead of banning the whole bouncer.
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| 6 |
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| 7 | Assuming you're running Linux and want to use the IPv6 prefix `2001:db8::/32`:
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| 8 |
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| 9 | 1. Setup the router to redirect ingress packets with one of these IP addresses
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| 10 | as the destination to your bouncer.
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| 11 | 2. Enable `net.ipv6.ip_nonlocal_bind=1` with `sysctl`.
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| 12 | 3. Setup a local route for this prefix:
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| 13 | `ip route add local 2001:db8::/56 dev lo`
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| 14 | 4. Check network connectivity:
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| 15 | `curl -6 --interface 2001:db8::42 https://emersion.fr`
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| 16 | 5. Configure soju to use this IP range: `upstream-user-ip 2001:db8::/32`
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| 17 |
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| 18 | The address `2001:db8::1` will be left unused. Users will be assigned IP
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| 19 | addresses starting from `2001:db8::2`.
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| 20 |
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| 21 | The IRC `/whois` command can be used to double-check that the expected IPv6
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| 22 | addresses are being used.
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