Hello, While yum is configured to use a proxy, like this : [base] name=CentOS-$releasever - Base mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os #baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/ gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6 proxy=http://proxy.lasb:3128 it still make some attempts to connect directly to Internet (tcp 80). These attempts are denied and logged by the firewall. If I comment out the line mirrorlist= and uncomment the line baseurl= then there is no more direct connexion to Internet. (N.B. : in both cases, yum works well despite the access denied.) I have tried to add a line proxy= to fastestmirror.conf, but it doesn't change anything. I can't put proxy= in /etc/yum.conf because I also have a local repo. Any idea on how to avoid these connexion to Internet ? TIA, -- Philippe Naudin UMR MISTEA : Mathématiques, Informatique et STatistique pour l'Environnement et l'Agronomie INRA, bâtiment 29 - 2 place Viala - 34060 Montpellier cedex 2 tél: 04.99.61.26.34, fax: 04.99.61.29.03, mél: naudin at supagro.inra.fr