iptables -I INPUT -p tcp --dport 111 -j DROP
iptables -I INPUT -s 10.171.254.221 -p tcp --dport 111 -j ACCEPT
iptables -I INPUT -s 10.175.197.98 -p tcp --dport 111 -j ACCEPT
iptables -I INPUT -s 115.236.160.xx -p tcp --dport 111 -j ACCEPT
[root@nfs01 ~]# netstat -nap | grep rpcbind
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 909/rpcbind
udp 0 0 0.0.0.0:111 0.0.0.0:* 909/rpcbind
udp 0 0 0.0.0.0:656 0.0.0.0:* 909/rpcbind
unix 2 [ ACC ] STREAM LISTENING 8778 909/rpcbind /var/run/rpcbind.sock
unix 2 [ ] DGRAM 8786 909/rpcbind
1. portmap 端口 111 udp/tcp；
2. nfsd 端口 2049 udp/tcp；
[root@nfs01 ~]# cat /etc/services | grep 2049
nfs 2049/tcp nfsd shilp # Network File System
nfs 2049/udp nfsd shilp # Network File System
nfs 2049/sctp nfsd shilp # Network File System
[root@nfs01 ~]# cat /etc/services | grep 111
sunrpc 111/tcp portmapper rpcbind # RPC 4.0 portmapper TCP
sunrpc 111/udp portmapper rpcbind # RPC 4.0 portmapper UDP
[root@nfs01 ~]# netstat -nap | grep 2049
tcp 0 0 0.0.0.0:2049 0.0.0.0:* LISTEN -
tcp 0 0 10.171.250.68:2049 10.175.197.98:676 ESTABLISHED -
tcp 0 0 10.171.250.68:2049 10.171.254.221:834 ESTABLISHED -
udp 0 0 0.0.0.0:2049 0.0.0.0:* -
[root@nfs01 ~]# cat /etc/exports
/nfs01 10.171.254.221(rw,sync,no_root_squash)
/nfs01 10.175.197.98(rw,sync,no_root_squash)