root@OpenWrt:~# opkg update
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/base/Packages.gz.
wget: bad address 'downloads.openwrt.org'
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/base/Packages.sig.
wget: bad address 'downloads.openwrt.org'
Signature check failed.
Remove wrong Signature file.
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/luci/Packages.gz.
wget: bad address 'downloads.openwrt.org'
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/luci/Packages.sig.
wget: bad address 'downloads.openwrt.org'
Signature check failed.
Remove wrong Signature file.
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/packages/Packages.gz.
wget: bad address 'downloads.openwrt.org'
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/packages/Packages.sig.
wget: bad address 'downloads.openwrt.org'
Signature check failed.
Remove wrong Signature file.
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/routing/Packages.gz.
wget: bad address 'downloads.openwrt.org'
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/routing/Packages.sig.
wget: bad address 'downloads.openwrt.org'
Signature check failed.
Remove wrong Signature file.
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/telephony/Packages.gz.
wget: bad address 'downloads.openwrt.org'
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/telephony/Packages.sig.
wget: bad address 'downloads.openwrt.org'
Signature check failed.
Remove wrong Signature file.
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/management/Packages.gz.
wget: bad address 'downloads.openwrt.org'
Downloading http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/management/Packages.sig.
wget: bad address 'downloads.openwrt.org'
Signature check failed.
Remove wrong Signature file.
Collected errors:
 * opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/base/Packages.gz, wget returned 1.
 * opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/base/Packages.sig, wget returned 1.
 * opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/luci/Packages.gz, wget returned 1.
 * opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/luci/Packages.sig, wget returned 1.
 * opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/packages/Packages.gz, wget returned 1.
 * opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/packages/Packages.sig, wget returned 1.
 * opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/routing/Packages.gz, wget returned 1.
 * opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/routing/Packages.sig, wget returned 1.
 * opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/telephony/Packages.gz, wget returned 1.
 * opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/telephony/Packages.sig, wget returned 1.
 * opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/management/Packages.gz, wget returned 1.
 * opkg_download: Failed to download http://downloads.openwrt.org/chaos_calmer/15.05/brcm63xx/generic/packages/management/Packages.sig, wget returned 1.