Issue with tun interface

[ArashT]

My router: Asus GT-AX6000
Firmware: asuswrt-merlin (+ entware)

I have a socks5 proxy on my router (by XTLS/Xray-core), the proxy itself is working fine
I want to use heiher/hev-socks5-tunnel that send all data with the proxy
First I noticed it fails to run because it couldn't create tun interface
After some searches I found the solution: I had to run "modprobe tun" command
tun2socks (hev-socks5-tunnel) started without error but I had connection issue
At first I thought my custom routing is the problem but It wasn't. The problem was the tun itself
I executed tun2socks without any custom routing and entered "curl --interface tun0 ipinfo.io" command to test the tun interface but curl simply fails and it can't get the response
Any suggestion to fix this issue ?
Thanks in advance

 

[L&LD]

The firmware version is important to note.

 

[sfx2000]

My router: Asus GT-AX6000

there is a dedicated subforum here that may help you sort your issues.

Be kind enough moving forward to consider that many of us are not Asus customers...

 

[ArashT]

The firmware version is important to note.

Asuswrt-Merlin GT-AX6000_3004_388.4_0

 

[L&LD]

Any reason you're not using 388.5? Or testing with 388.6 Alpha 1 (from yesterday)?

 

[ArashT]

Any reason you're not using 388.5? Or testing with 388.6 Alpha 1 (from yesterday)?

Upgraded to "GT-AX6000_3004_388.5_0", still I have the same issue

 

[singledog]

RT-AC86U 386.12_4
sing-box tun mode, same issue