I have USR9108 Modem and I install openwrt backfire 10.03.1 on it
as it is the onle version runs with good speed ( I try 14, 15 and 17 but they
are very slow and restarts the modem )
My main use of this to run zerotier on it but when I update packages from
system -> software I did find it.
Also I try "opkg install zerotier_*.ipk" from ssh but fail
wfopen: zerotier_*.ipk: No such file or directory.
pkg_init_from_file: Failed to extract control file from zerotier_*.ipk.
Backfire is over 8 years old now, and is no longer maintained or actively supported. It is known to have multiple security vulnerabilities in the kernel and application software.