telnet to adjacent computer fails

[don fisher]

Slight change, but after editing the iptables, I was able to mount my 
nfs file system. But umount will not work. It says:

umount /dfpc57
umount.nfs: /dfpc57: not found
umount.nfs: /dfpc57: not found

But df says:

dfpc57:/       nfs       678G  184G  460G  29% /dfpc57

Also mtab has what I interpret as strange entries. I think it claims UDP 
instead of TCP and mountvers=3. Does mountvers=3 => nfsv3?


dfpc57:/ /dfpc57 nfs 
rw,nosuid,relatime,vers=3,rsize=8192,wsize=8192,namlen=255,soft,proto=tcp,timeo=10,retrans=10,sec=sys,mountaddr
=192.168.7.57,mountvers=3,mountport=20048,mountproto=udp,local_lock=none,addr=192.168.7.57 
0 0

My /etc/exports is: / 
192.168.7.0/255.255.255.0(rw,no_root_squash,insecure,sync,no_subtree_check)

Thanks,
Don