SOCKS-proxy Dante

https://habr.com/post/354274/

apt install dante-server

internal: 0.0.0.0 port = 1080
external: 185.21.x.x

clientmethod: none
socksmethod: username
user.privileged: root
user.notprivileged: nobody
errorlog: /var/log/danted/sockd.errlog
logoutput: /var/log/danted/socksd.log

client pass {
     from: 0.0.0.0/0 to: 0.0.0.0/0
}

socks pass {
     from: 0.0.0.0/0 to: 0.0.0.0/0
}

Modify Dante configuration file to enable logging, here for errors and debug:
In case you are receiving errors after configuring log sinks for danted service, like:

alert: configparsing(): could not (re)open logfile "/var/log/socks.log": Read-only file system

stop service
edit service config:
vim /lib/systemd/system/danted.service
add entry to allow writing to /var/log/ directory:
InaccessibleDirectories=...
ReadOnlyDirectories=...
ReadWriteDirectories=/var/log

reload service:
systemctl daemon-reload
service danted restart