clash/docs/introduction/faq.md

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sidebarTitle: Frequently Asked Questions
sidebarOrder: 4
---
# Frequently Asked Questions
Here we have some common questions people ask. If you have any questions not listed here, feel free to [open an issue](https://github.com/Dreamacro/clash/issues/new/choose).
[[toc]]
## Which release should I use for my system?
Here are some common systems that people use Clash on, and the recommended release for each of them:
- NETGEAR WNDR3700v2: mips-hardfloat [#846](https://github.com/Dreamacro/clash/issues/846)
- NETGEAR WNDR3800: mips-softfloat [#579](https://github.com/Dreamacro/clash/issues/579)
- ASUS RT-AC5300: armv5 [#2356](https://github.com/Dreamacro/clash/issues/2356)
- MediaTek MT7620A, MT7621A: mipsle-softfloat ([#136](https://github.com/Dreamacro/clash/issues/136))
- mips_24kc: [#192](https://github.com/Dreamacro/clash/issues/192)
If your device is not listed here, you can check the CPU architecture of your device with `uname -m` and find the corresponding release in the release page.
## List of wontfix
The official Clash core project will not implement/fix these things:
- [Snell](https://github.com/Dreamacro/clash/issues/2466)
- [Custom CA](https://github.com/Dreamacro/clash/issues/2333)
- [VMess Mux](https://github.com/Dreamacro/clash/issues/450)
- [VLess](https://github.com/Dreamacro/clash/issues/1185)
- [KCP](https://github.com/Dreamacro/clash/issues/16)
- [mKCP](https://github.com/Dreamacro/clash/issues/2308)
- [TLS Encrypted Client Hello](https://github.com/Dreamacro/clash/issues/2295)
- [TCP support for Clash DNS server](https://github.com/Dreamacro/clash/issues/368)
- [MITM](https://github.com/Dreamacro/clash/issues/227#issuecomment-508693628)
The following will be considered implementing when the official Go QUIC library releases.
- [TUIC](https://github.com/Dreamacro/clash/issues/2222)
- [Hysteria](https://github.com/Dreamacro/clash/issues/1863)
## Proxies work on my local machine, but not on my router or in a container
Your system might be out of sync in time. Refer to your platform documentations about time synchronisation - things will break if time is not in sync.
## Time complexity of rule matching
Refer to this discussion: [#422](https://github.com/Dreamacro/clash/issues/422)
## Clash Premium unable to access Internet
You can refer to these relevant discussions:
- [#432](https://github.com/Dreamacro/clash/issues/432#issuecomment-571634905)
- [#2480](https://github.com/Dreamacro/clash/issues/2480)
## error: unsupported rule type RULE-SET
If you stumbled on this error message:
```txt
FATA[0000] Parse config error: Rules[0] [RULE-SET,apple,REJECT] error: unsupported rule type RULE-SET
```
You're using Clash open-source edition. Rule Providers is currently only available in the [Premium core](https://github.com/Dreamacro/clash/releases/tag/premium). (it's free)
## DNS Hijack does not work
Since `tun.auto-route` does not intercept LAN traffic, if your system DNS is set to servers in private subnets, DNS hijack will not work. You can either:
1. Use a non-private DNS server as your system DNS like `1.1.1.1`
2. Or manually set up your system DNS to the Clash DNS (by default, `198.18.0.1`)