Minor Somewhat this is the reverse of JENKINS-40775, maybe related to JENKINS-29343
I have configured a corporate proxy with authentication in the /pluginManager/advanced screen. The proxy we have does not support NTLM, basic authentication works.
Given the Test URL:
The check gives
Failed to connect to http://updates.jenkins.io (code 407).
and gives the following log output:
2021-04-14 07:56:43.757+0000 [id=16] INFO o.a.c.h.a.AuthChallengeProcessor#selectAuthScheme: ntlm authentication scheme selected 2021-04-14 07:56:43.781+0000 [id=16] SEVERE o.a.c.h.HttpMethodDirector#authenticate: Credentials cannot be used for NTLM authentication: org.apache.commons.httpclient.UsernamePasswordCredentials org.apache.commons.httpclient.auth.InvalidCredentialsException: Credentials cannot be used for NTLM authentication: org.apache.commons.httpclient.UsernamePasswordCredentials at org.apache.commons.httpclient.auth.NTLMScheme.authenticate(NTLMScheme.java:342) at org.apache.commons.httpclient.HttpMethodDirector.authenticateProxy(HttpMethodDirector.java:327) at org.apache.commons.httpclient.HttpMethodDirector.authenticate(HttpMethodDirector.java:239) at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:177) at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:404) at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:330) at hudson.ProxyConfiguration$DescriptorImpl.doValidateProxy(ProxyConfiguration.java:458) 2021-04-14 07:56:43.829+0000 [id=16] INFO o.a.c.h.HttpMethodDirector#processProxyAuthChallenge: Failure authenticating with NTLM <any realm>@this.is.my.corporate.proxy:8080
HOWEVER, the updates do work:
2021-04-14 07:56:56.420+0000 [id=154] INFO hudson.util.Retrier#start: Attempt #1 to do the action check updates server 2021-04-14 07:57:04.309+0000 [id=154] INFO h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.tasks.Maven.MavenInstaller 2021-04-14 07:57:05.372+0000 [id=154] INFO h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.plugins.gradle.GradleInstaller 2021-04-14 07:57:06.124+0000 [id=154] INFO h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.tasks.Ant.AntInstaller 2021-04-14 07:57:07.607+0000 [id=154] INFO h.m.DownloadService$Downloadable#load: Obtained the updated data file for hudson.tools.JDKInstaller 2021-04-14 07:57:07.607+0000 [id=154] INFO hudson.util.Retrier#start: Performed the action check updates server successfully at the attempt #1