![]() (Change to your local IP's or to " any" instead of 10.0.0. If an instance in your VPC is the client initiating a request, your network ACL must have an inbound rule to enable traffic destined for the ephemeral ports. Sudo ufw allow in from 10.0.0.1/20 to any port 33333 These ports are also known as ephemeral ports. Sudo ufw allow in from 10.0.0.1/20 to any port 2049 Dynamic ports use a range of port numbers thats defined by the OS version. (2) add nfs & mountd ports sudo ufw allow in from 10.0.0.1/20 to any port 111 Ephemeral means temporary or short-lived, as is the characteristic of this type of port. NAT translates IP addresses, usually private-public. ![]() Apps generate a random ephemeral port to establish a connection from the client to the server. (1) delete old rules, do this manually or reset if this is the only use for the firewall: # WARNING: Don't copy & paste this if you don't understand what it does: OSes generally use the IANA ephemeral port range of 49152 to 65535. Now try to reset nfs using: sudo service nfs-kernel-server restartĪnd test if it helped using: rpcinfo -p | grep "tcp.*mountd"įor me it wasn't enough, but a full restart fixed the issue. add this instead: RPCMOUNTDOPTS="-port 33333".comment out this line: RPCMOUNTDOPTS=-manage-gids.Setting up a fixed port for mountd gksudo gedit /etc/default/nfs-kernel-server TL DR - need to allow both nfs ports (111, 2049) and mountd port after fixing it. Transmission Control Protocol (TCP) The Transmission Control Protocol (TCP) is a transport protocol that is used on top of IP to ensure reliable transmission of packets. I found useful directions for my problem on this page, but there was no easy to follow recipe.
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