How to Fix clnt_create RPC Port mapper failure Unable to receive errno 113

I setup the NFS server without any issues.

On the NFS server, the following are already taken care:

  • rpcbind service is running.
  • nfs service is running.
  • I’ve exported a local directory using client-ip using exportfs


However, on the client side, when I do “showmount -e”, I got the following error message: “clnt_create: RPC: Port mapper failure – Unable to receive: errno 113 (No route to host)”

showmount output:

# showmount -e 192.168.101.1
clnt_create: RPC: Port mapper failure - Unable to receive: errno 113 (No route to host)

In the above case, that 192.168.101.1 is where the NFS server is running.

If you get the above, error message, go through the following check-list to identify the problem.

1. Check Connectivity between the server

From the NFS client machine, ping the NFS server ip-address to make sure it is working properly.

ping 192.168.101.1

If ICMP is disabled on the NFS server, do other appropriate checks to make sure you can connect to that server. May be you can ssh to it.

ssh 192.168.101.1

2. Execute portinfo

On the NFS client machine execute the following, which will display the RPC information of the remote NFS server.

# rpcinfo -p 192.168.102.23
   program vers proto   port  service
    100000    4   tcp    111  portmapper
    100000    3   tcp    111  portmapper
    100011    1   udp    875  rquotad
    100005    1   udp  59353  mountd
    100003    2   tcp   2049  nfs
    100003    3   tcp   2049  nfs
    100003    4   tcp   2049  nfs
    100227    2   tcp   2049  nfs_acl
    100227    3   tcp   2049  nfs_acl
    100003    2   udp   2049  nfs
    100003    3   udp   2049  nfs
    100003    4   udp   2049  nfs
    100227    2   udp   2049  nfs_acl
    100227    3   udp   2049  nfs_acl
    100021    1   udp  34104  nlockmgr
    100021    3   udp  34104  nlockmgr
    ...

As you see from the above output, rpcinfo can talk to NFS server, and it also shows that NFS service is running on the NFS server.

If you don’t have the NFS server running, start it on the NFS server:

service nfs start

3. Open-up Appropriate Ports

Check if you are running IPTables on the NFS server.

service iptables status

If you are running IPTables, make sure you open-up port 111 and 2049 as shown below.

iptables -A INPUT -p tcp --dport 111 -j ACCEPT
iptables -A INPUT -p udp --dport 111 -j ACCEPT
iptables -A INPUT -p tcp --dport 2049 -j ACCEPT
iptables -A INPUT -p udp --dport 2049 -j ACCEPT

Also, please note that if you are running SELinux, by default it allows NFS to share the mount points. So, you don’t need to do anything specific to SELinux. But, if you like, you can check the audit.log file to make sure SELinux is not blocking anything related to NFS.

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