[OpenWrt Wiki] Integrating an OpenWrt network device in ...
https://openwrt.org/docs/guide-user/network/integrating-openwrt-introduction13.06.2019 · While double NAT doesn't generally have any ill effects on run-of-the-mill network connectivity – Web browsing, e-mail, IM, and so forth – it can be a major impediment when you need remote access to devices on your network, preventing you from connecting to your OpenWrt device's webinterface, ssh, VPN, ftp, http, Nextcloud, Seafile, and whatever else service you …