stronger ciphers support for NFS on RHEL5 (Secure NFS under Red Hat Enterprise Linux 4)
Mikhail T.
mi+thun at aldan.algebra.com
Wed Oct 28 17:33:49 EDT 2009
Hello!
The message at
http://mailman.mit.edu/pipermail/kerberos/2008-March/013398.html
warns about using anything but des-cbc-crc for NFS-access on Linux, but
ends with:
RHEL 5 has MIT 1.6, so the problem shouldn't exist there.
I'm currently struggling to make the KRB5-secured NFS-mounts work
between RHEL-5.4 client and a Solaris-8 server. The mounts succeed:
apdevl:/krbexport on /mnt type nfs (rw,intr,sec=krb5,addr=x.x.x.x)
but any attempt to access the mounted share (/mnt) is denied. All such
attempts also result in the following messages logged by rpc.gssd on the
client:
WARNING: Failed to create krb5 context for user with uid 18039 for
server apdevl.dev.pathfinder.com
Am I right thinking, the problem is due to des-cbc-crc being disabled
realm-wide here? (The DES cipher is deemed too insecure by the network
admins.) Should I still have this problem -- despite running RHEL-5.4?
Any chance, support for stronger ciphers was added to Linux NFS-clients
since RHEL-5.4 was released?
Thanks a lot! Yours,
-mi
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