I need to use Clash proxy (I live in Iran and clash can help me go undetected and keep my VPN servers for longer) on my router. OpenWRT is great but the clash app is buggy
Clash is a proxy router
is there anything similar on pfSense?
It may be possible, but, you’d have to add the FreeBSD ports repo to add it and depending packages. You won’t have any WebUI configuration and would manually need to configure it on the CLI; but, FreeBSD does have Clash; FreshPorts -- net/clash: Rule-based tunnel in Go
Not familiar with Clash proxy but Pfsense has HAProxy. You can check it out and see if it does what you need.