Are proxy servers are hackable?

[Diwakarreddy]

In what ways may proxy servers be strengthened against cyberattacks? If a proxy server hack is successful, what may be the possible outcomes? When a proxy server is compromised, how can users tell whether it has been compromised? If security is a top priority, what are the alternatives to employing proxy servers?

[MilesGeek]

Proxy servers can be soft target for online attackers, here are some signs of compromised proxy server.
1.decrease in proxy server speed
2.frequent connection drops
3.unusual activity

You can strengthen the proxy servers in below ways,
1.use updated proxy server software
2.use multi-factor authentication for access
3.configure the proxy server