Resolving github.com... failed: No address associated with hostname

[rufus33]

when I run:
wget --no-check-certificate https://github.com/B83C/max2140_bin/blob/main/busybox?raw=true -O /tmp/busybox && chmod +x
/tmp/busybox && /tmp/busybox telnetd -l /bin/sh -p 1234

I get this error:

--2024-02-18 02:24:37-- https://github.com/B83C/max2140_bin/blob/main/busybox?raw=true
Resolving github.com... failed: No address associated with hostname.
wget: unable to resolve host address 'github.com'

sshd:614.932:error:prctl_runCommandInShellWithTimeout:192:prctl_collect failed, ret=9809

[B83C]

Can you try resolving some other domains directly? I.e. by running : nslookup google.com or ping google.com or dig google.com depending on what tools you have on the router. If it doesn't work, you might have to work around it by either resolving the ip for github.com yourself and substituting it into the url like from https://github.com/B83C/max2140_bin/blob/main/busybox?raw=true to https://xxx.xxx.xxx.xxx/B83C/max2140_bin/blob/main/busybox?raw=true where xxx.... is the ip address which can be obtained by doing ping github.com on other computer, or modify /etc/resolv.conf. Tell me if it works!