Scott Ehrlich wrote:
I have a few C5 machines on an isolated LAN that connect to a RHEL5 server via NFS and NIS for authentication. I discovered that one of the C5 workstations worked fine for NFS exporting, but refused to collaborate with the EL5 server for NIS user authentication.I had successfully connected other systems to this server without issue, but this machine was finicky.I had initially enabled the EL5 firewall, then later disabled it, including selecting --disable-firewall. Still, this one C5 workstation wouldn't cooperate for user authentication.Then, as a bit of an experiment, I opted to visit the EL5 services and manually highlight IPtables, clicked STOP, and tried the verification again. This time, the C5 system got the NIS data.Now, if I want to enable a firewall on all machines -As a server, EL5 does have an option to select NFS services be run on specific ports. How do I configure the C5 clients to also communicate on those ports, thus allowing full NIS/NFS user authentication and directory exporting, all the while with built-in firewall protection on all systems?These are all out-of-box setups, with no updates, and full package installs from the install media.As time goes on, I will migrate to the OpenLDAP world, but I haven't had the opportunity to experiment with that just yet.Thanks. Scott
This guide talks about NFS and NIS and firewalls: http://www.centos.org/docs/5/html/5.1/Deployment_Guide/
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