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====CONTEXT====
I run a publicly accessible web server at home, behind an OpenWrt router. The router has firewall rules allowing incoming connections to ports 80 and 443 (forwarding rules for ipv4; port access rules for ipv6).
====THE PROBLEM====
A recent snapshot upgrade made the web server unreachable from LAN using ipv4, while still being reachable from WAN. Ipv6 is unaffected and works as expected from both LAN and WAN.
====REPRODUCING====
Setup a web server inside your LAN network and confirm that it can be reached from outside. I use my phone's 4G connection for that.
harpia:
====CONTEXT====
I run a publicly accessible web server at home, behind an OpenWrt router. The router has firewall rules allowing incoming connections to ports 80 and 443 (forwarding rules for ipv4; port access rules for ipv6).
====THE PROBLEM====
A recent snapshot upgrade made the web server unreachable from LAN using ipv4, while still being reachable from WAN. Ipv6 is unaffected and works as expected from both LAN and WAN.
====REPRODUCING====
Setup a web server inside your LAN network and confirm that it can be reached from outside. I use my phone's 4G connection for that.
Download https://downloads.openwrt.org/snapshots/targets/ramips/mt7621/openwrt-ramips-mt7621-tplink_archer-c6-v3-squashfs-sysupgrade.bin and move it to "/tmp" on the router that is already running OpenWrt.
Run "sysupgrade openwrt-ramips-mt7621-tplink_archer-c6-v3-squashfs-sysupgrade.bin" and wait for the device to reboot.
SSH into it as root, set a root password, apply any needed UCI configuration* and reboot.
See if you can reach the web server from inside the LAN using its public ipv4 address.
====DETAILS====
Device: TP-Link Archer C6 V3 (ramips/mt7621)
OpenWrt version: SNAPSHOT (r18754-f6a01d7f5c)
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