Java Proxy Authentication Required


http 407 proxy authentication required : how to handle in java ...

http 407 proxy authentication required : how to handle in java …

tProperty(“oxySet”, “true”);
tProperty(“”, “true”);
tProperty(“oxyHost”, “192. 168. 1. 103”);
tProperty(“oxyPort”, “3128”);
tProperty(“oxyUser”, “user123”);
tProperty(“oxyPassword”, “passwD123”);
url = new URL(“);
every time when I am using this code IOException throws which say HTTP response code 407.
HTTP 407 means proxy authentication required. why this problem is coming while I set proxyUser and proxyPassword.
401 will occur if I put wrong password but it always give me 407, means my code does not take username and password. In above code user123 is username and passwD123 is password for proxy authentication.
asked Jan 1 ’13 at 19:06
I found the solution thanks Mr. Vinod Singh.
Proxy authentication in Java
The usual corporate networks provide internet access via proxy servers and at times they require authentication as well. May applications do open the connections to servers which are external to the corporate intranet. So one has to do proxy authentication programmatically. Fortunately Java provides a transparent mechanism to do proxy authentications.
Create a simple class like below-
class ProxyAuthenticator extends Authenticator {
private String user, password;
public ProxyAuthenticator(String user, String password) {
= user;
ssword = password;}
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user, CharArray());}}
and put these lines of code before your code opens an URLConnection-
tDefault(new ProxyAuthenticator(“user”, “password”));
tProperty(“oxyHost”, “proxy host”);
tProperty(“oxyPort”, “port”);
Now all calls will successfully pass through the proxy authentication.
answered Jan 1 ’13 at 20:57
dayitv89dayitv892, 7652 gold badges25 silver badges43 bronze badges
You mentioned:
Create a simple class like below-…
What if the site you are connecting to also requires a username/password to allow you.
Setting a Default Authenticator(tDefault) will fail I guess when the external site will look for authenticated user.
Any views? meone?
Used this code earlier and was getting the error (407) Proxy Authentication Required.
I believe that was because the authentication was requested by different hosts. and when you set a default authenticator with one user/pass for one host, then the authentication will fail for other requesting host. I made the following change yesterday to SimpleAuthenticator class and now it works like a charm.
protected PasswordAuthentication getPasswordAuthentication()
String requestingHost = getRequestingHost();
if (requestingHost == proxyHost){
(“getPasswordAuthentication() request recieved from->” + requestingHost);
return new PasswordAuthentication(proxyuser, CharArray());}
return new PasswordAuthentication(sharepointusername, CharArray());}}
More info here:
answered Jul 29 ’13 at 16:08
TheAshwaniKTheAshwaniK1, 43813 silver badges15 bronze badges
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407 Proxy Authentication Required - HTTP - MDN Web Docs

407 Proxy Authentication Required – HTTP – MDN Web Docs

The HTTP 407 Proxy Authentication Required client error
status response code indicates that the request has not been applied because it lacks
valid authentication credentials for a proxy server that is between the
browser and the server that can access the requested resource.
This status is sent with a Proxy-Authenticate header that contains
information on how to authorize correctly.
Status407 Proxy Authentication Required
Example responseHTTP/1. 1 407 Proxy Authentication Required
Date: Wed, 21 Oct 2015 07:28:00 GMT
Proxy-Authenticate: Basic realm=”Access to internal site”
SpecificationsSpecificationHypertext Transfer Protocol (HTTP/1. 1): Authentication (HTTP/1. 1)# status. 407Browser compatibilityBCD tables only load in the browserSee also
HTTP authentication
401, 403
Basic authentication fails for outgoing proxy in Java 8u111

Basic authentication fails for outgoing proxy in Java 8u111

ProblemYou want to configure outgoing proxy for any Atlassian product and that proxy requires basic authentication. Assuming that username/pass is correct, but you are still getting error: 407 Proxy Authentication RequiredSee the stack-trace:
Unable to tunnel through proxy. Proxy returns “HTTP/1. 1 407 Proxy Authentication Required”
at ()
Typical Java environment variables for proxy:
oxyUser=test oxyPassword=ping oxyHost=172. 16. 47. 128 oxyPort=8080 oxyUser=test oxyPassword=ping oxyHost=172. 128 oxyPort=808
See related:

Getting issue details…
DiagnosisEnvironmentJava version 8u111+Diagnostic StepsYou can capture TCP session and you can see that Java doesn’t send Proxy-Authorization header. Eg:
User-Agent: Java/1. 8. 0_92
Accept: text/html, image/gif, image/jpeg, *; q=. 2, */*; q=. 2
Proxy-Connection: keep-alive
CauseIn Java 8u111 Basic authentication for HTTPS tunneling was disabled by default. From some environments, certain authentication schemes may be undesirable when proxying HTTPS. Accordingly, the Basic authentication scheme has been deactivated, by default, in the Oracle Java Runtime.. Now, proxies requiring Basic authentication when setting up a tunnel for HTTPS will no longer succeed by default. If required, this authentication scheme can be reactivated by removing Basic from the networking property, or by setting a system property of the same name to “” ( empty) on the command solutionIf you still want to use basic authentication for Proxy you can re-enable it. Add to Java environment:
Last modified on Oct 11, 2018
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Frequently Asked Questions about java proxy authentication required

How do I fix proxy authentication required?

In order to resolve the issue we can recommend the following options: 1. Configure the internet connection to not use the Proxy server. In the Internet Explorer, open the Internet Options dialog box, click Connections, click LAN Settings, and disable “Use a Proxy Server…”.

Is Proxy authentication required?

The 407 Proxy Authentication Required is an HTTP response status code indicating that the server is unable to complete the request because the client lacks proper authentication credentials for a proxy server that is intercepting the request between the client and server.Feb 1, 2018

How do I authenticate a proxy?

When Proxy Authentication is disabled, you are only allowed to configure new policies using IP addresses….To configure user authentication method:Go to Core Settings > Connection Settings.Click the Proxy Authentication switch to enable.In the Proxy Authentication area, select one of the following options:

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