network protocoal configuration for nfs server

nfs server 配置允许的网络协议。 nfs4 必须需要tcp 协议

 

default to nfs2, nfs3, nfs4, both network protocol udp/tcp are supported by them.

see more details by "man rpc.nfsd"

 

simplely, first , find below line in this file "/etc/init.d/nfs":

 

daemon rpc.nfsd $RPCNFSDARGS $RPCNFSDCOUNT

 

Then , to support tcp only, change it as below and restart nfs service.

 

daemon rpc.nfsd -U $RPCNFSDARGS $RPCNFSDCOUNT  (#comment: -u means no udp protocol)

 

to support udp only  , change it as below and restart nfs service.

 

daemon rpc.nfsd -T $RPCNFSDARGS $RPCNFSDCOUNT  (#comment: -u means no tcp protocol)

 

 

Then to look up the what protocol are supported.

 

# rpcinfo | grep nfs

 

  program vers proto   port

    100003    2   udp   2049  nfs
    100003    3   udp   2049  nfs
    100003    4   udp   2049  nfs
    100003    2   tcp   2049  nfs
    100003    3   tcp   2049  nfs
    100003    4   tcp   2049  nfs

We can see that from output , we got nfs2,nfs3,nfs4 in this nfs server. and support the tcp udp protocol.

 

 

Note:

 

nfs require the tcp protocol.

so we can't use the only -T parameter in starting nfs4.