Spring Boot with OAuth2 behind reverse proxy - spring-boot

Question

I'm new with Spring Security and trying to develop Spring Boot app with Google login using OAuth2 which runs under hostname:8080. This app is behind Apache reverse proxy server https://url.com.
Spring Boot version 2.1.0
Spring Security version 5.1.1
build.gradle:
dependencies {
implementation("org.springframework.boot:spring-boot-starter-web")
implementation("org.springframework.boot:spring-boot-starter-security")
implementation("org.springframework.security:spring-security-oauth2-client")
implementation("org.springframework.security:spring-security-oauth2-jose")
}
application.yml:
oauth2:
client:
registration:
google:
clientId: <clientId>
clientSecret: <clientSecret>
scope: profile, email, openid
server:
use-forward-headers: true
servlet:
session:
cookie:
http-only: false
Spring Security config:
#Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
#Override
protected void configure(HttpSecurity http) throws Exception {
http
.csrf()
.disable()
.authorizeRequests()
.anyRequest()
.authenticated()
.and()
.oauth2Login();
}
}
I request https://url.com
Get redirected to https://accounts.google.com/signin/oauth/
When authenticated get redirected back to
https://url.com/login/oauth2/code/google?state={state}&code={code}&scope=openid+email+profile+https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fuserinfo.email+https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fuserinfo.profile+https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fplus.me&authuser=0&session_state={session_state}&prompt=none which timed out with error:
[invalid_token_response] An error occurred while attempting to
retrieve the OAuth 2.0 Access Token Response: I/O error on POST
request for "https://www.googleapis.com/oauth2/v4/token": Connection
timed out (Connection timed out); nested exception is
java.net.ConnectException: Connection timed out (Connection timed out)
Is this error caused by the proxy server settings or boot app? Thanks for help.

Answer 1

Solved. I had to set the JVM parameters:
https.proxyHost=[host]
https.proxyPort=[port]
http.proxyHost=[host]
http.proxyPort=[port]