@Neeraj Sabharwal
Resolved:
The problem was related to proxy Authentication. So, I installed and configured CNTLM to access ISA Proxy Server on Centos 6.
Look at the article :
http://wingloon.com/2014/04/11/how-to-install-and-configure-cntlm-to-access-isa-server-on-centos-6-5...
1.Install and configure cntlm
2. configure yum to use through ISA Proxy
add a line:
proxy=http://127.0.0.1:3128/
add :
export http_proxy=http://localhost:3128/
export https_proxy=${http_proxy}
export ftp_proxy=${http_proxy}
- logoff root and login again
- yum clean all
- yum install XXXX
yum update, yum repolist or yum install now works fine