Cannot update and cannot install luci

[backupandforkacc]

After installation, I have connected the router via cable to my fritzbox. I then tried to update or to install luci, but failed:

root@OpenWrt:~# opkg update
Downloading http://downloads.openwrt.org/snapshots/targets/ramips/mt7621/package                                                             s/Packages.gz
Failed to establish connection
*** Failed to download the package list from http://downloads.openwrt.org/snapshots/targets/ramips/mt7621/pac                                kages/Packages.gz

Downloading http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/base/Packages.gz
Failed to establish connection
*** Failed to download the package list from http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/base                                /Packages.gz

Downloading http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/luci/Packages.gz
Failed to establish connection
*** Failed to download the package list from http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/luci                                /Packages.gz

Downloading http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/packages/Packages.gz
Failed to establish connection
*** Failed to download the package list from http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/pack                                ages/Packages.gz

Downloading http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/routing/Packages.gz
Failed to establish connection
*** Failed to download the package list from http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/rout                                ing/Packages.gz

Downloading http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/telephony/Packages.gz
Failed to establish connection
*** Failed to download the package list from http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/telephony/Packages.gz

Collected errors:
 * opkg_download: Failed to download http://downloads.openwrt.org/snapshots/targets/ramips/mt7621/packages/Packages.gz, wget returned 4.
 * opkg_download: Check your network settings and connectivity.

 * opkg_download: Failed to download http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/base/Packages.gz, wget returned 4.
 * opkg_download: Check your network settings and connectivity.

 * opkg_download: Failed to download http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/luci/Packages.gz, wget returned 4.
 * opkg_download: Check your network settings and connectivity.

 * opkg_download: Failed to download http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/packages/Packages.gz, wget returned 4.
 * opkg_download: Check your network settings and connectivity.

 * opkg_download: Failed to download http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/routing/Packages.gz, wget returned 4.
 * opkg_download: Check your network settings and connectivity.

 * opkg_download: Failed to download http://downloads.openwrt.org/snapshots/packages/mipsel_24kc/telephony/Packages.gz, wget returned 4.
 * opkg_download: Check your network settings and connectivity.

I reached the router via the IPv6 adress that the fritzbox gave me. So it surely is connected to the fritzbox. There are also no restrictions. Still it seems it does not get any internet connection. What am I doing wrongly?

[acecilia]

This is not a problem of OpenWrtInvasion, this is an issue with OpenWrt itself