How does this uci command influence the firewall?

[root-r]

dear community,

i need your help interpreting a specific uci command.

here's some information about my situation: i successfully installed the latest version of openwrt on a d-link dwr-921 lte router. just like the documentation says, i then used the following uci commands to activate the integrated lte modem:

uci set network.wwan=interface
uci set network.wwan.proto='wwan'
uci set network.wwan.apn=''
uci set network.wwan.pincode=''
uci set network.wwan.auto='0'
uci commit network

uci set firewall.@zone[1].network='wan wwan wan6'
uci commit firewall

these commands made the router work correctly. however, i would like to know what the command
uci set firewall.@zone[1].network='wan wwan wan6'
exactly does to the firewall.

i was advised that changing the preconfiguration of openwrt's firewall should only be done by an experienced user (which i am not yet) and that the average user should be fine with the default settings. nevertheless, these steps were neccessary to make the router work.

so my questions are: in how far does the command
uci set firewall.@zone[1].network='wan wwan wan6'
modify the preoconfigured firewall? does it even do so? and if yes, is the firewall now "less secure" than it would be without these commands?

thank you

[mk24]

It merely adds the new wwan (wireless WAN) network to the wan zone. This is secure, since wan is the untrusted (Internet facing) side of the firewall.

[mrvikki]

can you tell me how did you use these uci commands in which software command formmat

[vgaetera]

Check out the official documentation and examples:

• https://openwrt.org/docs/guide-user/base-system/uci
• https://openwrt.org/docs/guide-quick-start/sshadministration