Re: Another DNS question.

Eric Donkersloot wrote:
On Sat, 2006-08-05 at 20:17 +0200, Erik P. Olsen wrote:
I have several PCs/LapTops accessing the Internet through a wireless router (Linksys WRT54G). It also acts as a DHCP server presenting each connected PC with an IP-address. For Internet access it works flawlessly but I have other application which access the PCs on the LAN, such as back-up programs (Bacula).

For the last sort of applications I need to have either a static IP-address or an allways correct association between workstation name and its IP-address (/etc/hosts). It so happens that if the configuration (in terms of connected PCs/LapTops) remains static then the boxes get the same IP-address each time they connect to the router. This is, however, not allways true if the configuration is dynamic (many different PCs and not allways the same).

I feel that what I really need is a DSN on the LAN which is being updated each time a box connects to the router and gets an IP-address. I have noticed that some people disable the DHCP server in their router and establesh a DHCP server in one of connected PCs, but I don't see how that can be accomplished and what happens if that server is taken out of the network?

Is there a way out of this problem?

I'm not sure I understand you correctly, but what about giving this
(backup) host a static ip address outside the dhcp range but obviously
in the same network ? Just narrow down the dhcp range on the router if
necessary.

OK. Let me explain it more specific. In the back-up config files I can address the clients (the PCs to be backed up) by either their IP-addresses or their hostnames (I think Windoze calls it workstation names). IP-addresses are dynamic and may change, host names are static so I can enter their host names into the config files to keep them static provided I have a dynamic way of modifying /etc/hosts whenever a box connects to the LAN. /etc/hosts is in a sense a DNS I just don't know of any method to keep it current.


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Erik P. Olsen, Civilingeniør, MSc
Solsortvej 30, DK-2000 Frederiksberg, Denmark
Phone: +45 38346480, Fax: +45 38346470, Mobil: +45 40765300

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