NFS: Difference between revisions
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Some things to know about NFS... | Some things to know about NFS... | ||
= | =NFSv3= | ||
==Server== | ==Server== | ||
===Bind rpc.mountd to specific port=== | ===Bind rpc.mountd to specific port=== | ||
The port of the rpc.mountd is usually random this is a nightmare for firewallers so picking a known port is much better. | The port of the rpc.mountd is usually random this is a nightmare for firewallers so picking a known port is much better. | ||
* /etc/default/nfs-kernel-server | * /etc/default/nfs-kernel-server | ||
< | <syntaxhighlight lang=ini> | ||
RPCMOUNTDOPTS="--manage-gids --port 33333" | RPCMOUNTDOPTS="--manage-gids --port 33333" | ||
</ | </syntaxhighlight> | ||
===Bind statd to specific port=== | ===Bind statd to specific port=== | ||
You just need it if you still need protocols below NFSv4. | |||
* /etc/default/nfs-common | * /etc/default/nfs-common | ||
< | <syntaxhighlight lang=ini> | ||
STATDOPTS="--port 33334 --outgoing-port 33335" | STATDOPTS="--port 33334 --outgoing-port 33335" | ||
</ | </syntaxhighlight> | ||
===Bind lockd to specific port=== | ===Bind lockd to specific port=== | ||
* /etc/sysctl.d/nfs-static-ports.conf | * /etc/sysctl.d/nfs-static-ports.conf | ||
< | <syntaxhighlight lang=ini> | ||
fs.nfs.nlm_tcpport = 33336 | fs.nfs.nlm_tcpport = 33336 | ||
fs.nfs.nlm_udpport = 33336 | fs.nfs.nlm_udpport = 33336 | ||
</ | </syntaxhighlight> | ||
Activate it without rebooting through: | Activate it without rebooting through: | ||
< | <syntaxhighlight lang=bash> | ||
# sysctl --load /etc/sysctl.d/nfs-static-ports.conf | # sysctl --load /etc/sysctl.d/nfs-static-ports.conf | ||
fs.nfs.nlm_tcpport = 33336 | fs.nfs.nlm_tcpport = 33336 | ||
fs.nfs.nlm_udpport = 33336 | fs.nfs.nlm_udpport = 33336 | ||
</ | </syntaxhighlight> | ||
===Configure ufw=== | |||
Caution! The port you set above for the mountd has to be the same here! I used 33333, if you changed it above for some reason: Change it here, too! | |||
* /etc/ufw/applications.d/nfs | |||
<syntaxhighlight lang=ini> | |||
[NFS-Server] | |||
title=NFS-Server | |||
description=NFS Server | |||
ports=111/tcp|111/udp|2049/tcp|33333:33336/tcp | |||
</syntaxhighlight> | |||
<syntaxhighlight lang=bash> | |||
# ufw allow from 172.16.16.16/28 to any app "NFS-Server" | |||
</syntaxhighlight> | |||
=NFSv4.1= | |||
==Server== | |||
===Configure rpc.idmapd=== | |||
* /etc/idmapd.conf | |||
You should better set a Domain. Set the same Domain on server an client(s)! | |||
<syntaxhighlight lang=ini> | |||
[General] | |||
... | |||
# set your own domain here, if it differs from FQDN minus hostname. | |||
# you can use a fantasy name, but whatever it is, keep this identical on server and client! | |||
Domain = myfantasy.domain | |||
... | |||
</syntaxhighlight> | |||
===Disable at least NFSv2=== | ===Disable at least NFSv2=== | ||
* /etc/default/nfs-kernel-server | * /etc/default/nfs-kernel-server | ||
< | <syntaxhighlight lang=ini> | ||
STATDOPTS="--port 33334 --outgoing-port 33335 --no-nfs-version 2" | STATDOPTS="--port 33334 --outgoing-port 33335 --no-nfs-version 2" | ||
RPCNFSDOPTS="--no-nfs-version 2" | RPCNFSDOPTS="--no-nfs-version 2" | ||
</ | </syntaxhighlight> | ||
===Disable all but NFSv4 and higher=== | ===Disable all but NFSv4 and higher=== | ||
* /etc/default/nfs-kernel-server | * /etc/default/nfs-kernel-server | ||
< | <syntaxhighlight lang=ini> | ||
RPCMOUNTDOPTS="--manage-gids --port 33333 --no-nfs-version 2 --no-nfs-version 3" | RPCMOUNTDOPTS="--manage-gids --port 33333 --no-nfs-version 2 --no-nfs-version 3" | ||
NEED_STATD="no" | NEED_STATD="no" | ||
NEED_IDMAPD="yes" | NEED_IDMAPD="yes" | ||
RPCNFSDOPTS="--no-nfs-version 2 --no-nfs-version 3" | RPCNFSDOPTS="--no-nfs-version 2 --no-nfs-version 3" | ||
</ | </syntaxhighlight> | ||
===Configure ufw=== | ===Configure ufw=== | ||
For plain NFSv4 and up you just need this: | |||
<syntaxhighlight lang=bash> | |||
< | # ufw allow from 172.16.16.16/28 to any port 2049/tcp | ||
</syntaxhighlight> | |||
If you need still NFSv3 look above. | |||
# ufw allow from 172.16.16.16/28 to any | |||
</ | |||
===List clients that are connected=== | ===List clients that are connected=== | ||
< | <syntaxhighlight lang=bash> | ||
# cat /proc/fs/nfsd/clients/*/info | # cat /proc/fs/nfsd/clients/*/info | ||
clientid: 0x7829c17160bf7066 | clientid: 0x7829c17160bf7066 | ||
| Line 85: | Line 95: | ||
Implementation name: "Linux 3.10.0-1127.13.1.el7.x86_64 #1 SMP Tue Jun 23 15:46:38 UTC 2020 x86_64" | Implementation name: "Linux 3.10.0-1127.13.1.el7.x86_64 #1 SMP Tue Jun 23 15:46:38 UTC 2020 x86_64" | ||
Implementation time: [0, 0] | Implementation time: [0, 0] | ||
</ | </syntaxhighlight> | ||
==Server and Client== | ==Server and Client== | ||
Latest revision as of 03:52, 26 November 2021
Some things to know about NFS...
NFSv3
Server
Bind rpc.mountd to specific port
The port of the rpc.mountd is usually random this is a nightmare for firewallers so picking a known port is much better.
- /etc/default/nfs-kernel-server
RPCMOUNTDOPTS="--manage-gids --port 33333"
Bind statd to specific port
You just need it if you still need protocols below NFSv4.
- /etc/default/nfs-common
STATDOPTS="--port 33334 --outgoing-port 33335"
Bind lockd to specific port
- /etc/sysctl.d/nfs-static-ports.conf
fs.nfs.nlm_tcpport = 33336
fs.nfs.nlm_udpport = 33336
Activate it without rebooting through:
# sysctl --load /etc/sysctl.d/nfs-static-ports.conf
fs.nfs.nlm_tcpport = 33336
fs.nfs.nlm_udpport = 33336
Configure ufw
Caution! The port you set above for the mountd has to be the same here! I used 33333, if you changed it above for some reason: Change it here, too!
- /etc/ufw/applications.d/nfs
[NFS-Server]
title=NFS-Server
description=NFS Server
ports=111/tcp|111/udp|2049/tcp|33333:33336/tcp
# ufw allow from 172.16.16.16/28 to any app "NFS-Server"
NFSv4.1
Server
Configure rpc.idmapd
- /etc/idmapd.conf
You should better set a Domain. Set the same Domain on server an client(s)!
[General]
...
# set your own domain here, if it differs from FQDN minus hostname.
# you can use a fantasy name, but whatever it is, keep this identical on server and client!
Domain = myfantasy.domain
...
Disable at least NFSv2
- /etc/default/nfs-kernel-server
STATDOPTS="--port 33334 --outgoing-port 33335 --no-nfs-version 2"
RPCNFSDOPTS="--no-nfs-version 2"
Disable all but NFSv4 and higher
- /etc/default/nfs-kernel-server
RPCMOUNTDOPTS="--manage-gids --port 33333 --no-nfs-version 2 --no-nfs-version 3"
NEED_STATD="no"
NEED_IDMAPD="yes"
RPCNFSDOPTS="--no-nfs-version 2 --no-nfs-version 3"
Configure ufw
For plain NFSv4 and up you just need this:
# ufw allow from 172.16.16.16/28 to any port 2049/tcp
If you need still NFSv3 look above.
List clients that are connected
# cat /proc/fs/nfsd/clients/*/info
clientid: 0x7829c17160bf7066
address: "172.16.16.17:778"
name: "Linux NFSv4.1 client01.domain.tld"
minor version: 1
Implementation domain: "kernel.org"
Implementation name: "Linux 3.10.0-1127.13.1.el7.x86_64 #1 SMP Tue Jun 23 15:46:38 UTC 2020 x86_64"
Implementation time: [0, 0]
