Cannot configure WLAN Client connection as WWAN

[redradist]

Yes, it helped me rm /overlay/upper/etc/config/firewall !!
After restoring firewall configuration issue solved !!

Seems like I am messed up with firewall settings !!
Seems like was missed some config rule because previously I did not have it in /etc/config/firewall ... (

Thank you @mk24 !!
Thanks you all for your support !!

Also one additional question, could you please suggest documentation, book or manuals for proper configuring Routers on Linux specifically ?
I know theory, but theory is different from practice, I want some good book how to configure router, switch on linux, openwrt and so on ??

OpenWRT documentation is good, but seems like I missed some basis from the practice point of view ...

[lleachii]

@redradist

Also one additional question, could you please suggest documentation, book or manuals for proper configuring Routers on Linux specifically ?
I know theory, but theory is different from practice, I want some good book how to configure router, switch on linux, openwrt and so on ??

You want specifics by asking for general documentation...odd...

BTW, there's not much to making a Linux machine a router, you just enable IP Forwarding. This is all I've ever had to do.

• https://monoinfinito.wordpress.com/series/setting-up-a-linux-gatewayrouter-a-guide-for-non-network-admins/
• https://how-to.fandom.com/wiki/How_to_set_up_a_NAT_router_on_a_Linux-based_computer
• http://linux-training.be/security/ch10.html
• https://www.systutorials.com/1372/setting-up-gateway-using-iptables-and-route-on-linux/

I'm not really sure non-OpenWrt documentation will help much, as configs are done through an Interface (UCI) on OpenWrt.

Regarding configuring switches on OpenWrt, I suggest: https://openwrt.org/docs/guide-user/network/vlan/switch