nfs, stopping hackers

[Knapp]

This is from an ubuntu nfs webpage:
https://help.ubuntu.com/community/SettingUpNFSHowTo
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Security Note

Aside from the UID issues discussed above, it should be noted that an
attacker could potentially masquerade as a machine that is allowed to
map the share, which allows them to create arbitrary UIDs to access
your files. One potential solution to this is IPSec, see also the NFS
and IPSec section below. You can set up all your domain members to
talk only to each other over IPSec, which will effectively
authenticate that your client is who it says it is.
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I am setting up a very small home network of my desktop comp, printer
and a few laptops. Does this security note mean that hackers from the
internet can attack my lan? Or is this talking about people on the
lan? I trust all the lan users but obviously not all the Internet
users.


-- 
Douglas E Knapp

Open Source Sci-Fi mmoRPG Game project.
http://sf-journey-creations.wikispot.org/Front_Page
http://code.google.com/p/perspectiveproject/