Trying to get Yum setup for our environment. It is working fine updating remote clients(both 7.3 and 9), but it is not able to update itself. The webserver is running on this machine. There is no proxy server involved. I don't see any errors in the apache logs, or yum.log. Matt [root@ul055 os]# yum list Gathering package information from servers Getting headers from: Red Hat Linux 7.3 updates Error getting file http://midrangeweb.principal.com/pub/updates/7.3/en/os/headers/header.info [Errno 4] IOError: [Errno socket error] nonnumeric port [root@ul055 os]# curl http://midrangeweb.principal.com/pub/updates/7.3/en/os/headers/header.info 7:kiconedit-3.0.5a-0.73.1.i386=i386/kiconedit-3.0.5a-0.73.1.i386.rpm 0:kernel-BOOT-2.4.20-20.7.i386=i386/kernel-BOOT-2.4.20-20.7.i386.rpm 0:klettres-3.0.5a-0.73.0.i386=i386/klettres-3.0.5a-0.73.0.i386.rpm 7:kfile-pdf-3.0.5a-0.73.1.i386=i386/kfile-pdf-3.0.5a-0.73.1.i386.rpm 6:kdemultimedia-libs-3.0.5a-0.73.0.i386=i386/kdemultimedia-libs-3.0.5a-0.73.0.i386.rpm 0:man-1.5j-7.7x.0.i386=i386/man-1.5j-7.7x.0.i386.rpm . . . [root@ul055 os]# rpm -q redhat-release rpm rpm-python yum redhat-release-7.3-1 rpm-4.0.4-7x.18 rpm-python-4.0.4-7x.18 yum-1.0.3-1_80 [root@ul055 os]# host midrangeweb midrangeweb.principal.com is an alias for ul055.principal.com.