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content: add openwrt configuration page

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Signed-off-by: Christoph Heiss <christoph@c8h4.io>
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Christoph Heiss 2024-05-31 22:06:26 +02:00
parent a35a539939
commit e2dbc106ca
Signed by: c8h4
GPG key ID: 73D5E7FDEE3DE49A
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---
title: OpenWrt configuration tips & tricks
date: 2024-05-31T21:32:01+02:00
---
## configuring IPv6 privacy extension
all that's needed is to set a sysctl:
```shell {lineanchors=list}
$ secret="$(dd if=/dev/urandom bs=16c count=1 2>/dev/null \
| hexdump -e '8/2 "%04x:" "\n"'| sed 's/:$//')"
$ echo "net.ipv6.conf.default.stable_secret=$secret" \
>>/etc/sysctl.d/30-ipv6-privacy.conf
$ sysctl -w /etc/sysctl.d/30-ipv6-privacy.conf
$ ifup lan # and any other interface that might need it, or reboot
```
checking the current sysctl value:
```shell {lineanchors=list}
$ sysctl -a | grep stable_secret
```
(thanks to [this OpenWrt Discourse thread](https://forum.openwrt.org/t/cascading-routers-dhcpv6-and-unwanted-eui64-w-slaac-on-wan6/18993/37)!)