Hi Guys, My apologies for earlier mail without subject line. kindly ignore. i've CentOS 6.6 (Final) 64 bit version installed and I can not access the online repositories to install/update (pls see eror below the error), I tried to google this error I get a lot of links but nothing I could really solving this issue. I've already disabled ipv6 and also defined proxy in /etc/yum.conf. [root at myhost ~]# yum update Loaded plugins: fastestmirror, security Setting up Update Process Determining fastest mirrors * c6-media: http://mirror.centos.org/centos/6/os/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirror.centos.org/centos/6/os/x86_64/repodata/repomd.xml: (28, 'connect() timed out!') Trying other mirror. Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again If I try to use 'wget' to get 'repomd.xml' then it works fine. [root at myhost ~]# wget http://mirror.centos.org/centos/6/os/x86_64/repodata/repomd.xml --2015-03-09 20:05:03-- http://mirror.centos.org/centos/6/os/x86_64/repodata/repomd.xml Connecting to xx.xx.xx.xx:80... connected. Proxy request sent, awaiting response... 200 OK Length: 3751 (3.7K) [text/xml] Saving to: “repomd.xml” 100%[===============================================================================================================================================>] 3,751 --.-K/s in 0s 2015-03-09 20:05:03 (14.6 MB/s) - “repomd.xml” saved [3751/3751] Has anybody experienced this kind of beahviour and got it working ? Thank you in advance for pointers. Regards Ravi.