How I can re-start Server Assistant?

Question

Hello to all,
I've a MacPro with SnowLeopard Server 10.6.1 with IP 192.168.0.5 set to match a network whit a SonicWall firewall used as router with IP 192.168.0.3.
Now I just purchase the new Airport Extreme to replace the SonicWall and set up it with the same lan (192.168.0.x).
Both (SonicWall and Airport) are used as DHCP server for client in the lan.
The problem is that I cannot (or I'm unable) to set the IP address of the Airport, and it get by default 192.168.0.1 (SonicWall was x.x.x.3) and SLServer doesn't run because before the "router" was "x.x.x.3" and now is "x.x.x.1"
I'm triing to restart Server Assistant but if I choose 192.168.0.5 appears that the server is already configured...
May I re-start Server Assistant for the Server itself (not for remote) so that SLServer will re-set itself about new network router?
thanks to all for support.
Marco

Answer 1

Mrcitaly wrote:
If I use all manually setup, I can put in the router address.
Today, that field is blank, bacause Server assistant has setup it in this way:
IP address 192.168.0.5 (I put it manually)
Subnet mask (not modificable)
Router (any field or address is displayed)
DNS (set up from server assistant to 127.0.0.1)
The network stack can be modified using System Preferences > Network. The router address should be modifiable. Since this is a server, the configuration option should be static, followed by manually assigned IP, subnet (assumed to be 255.255.255.0), router, DNS, and search domain. If your server is at 192.168.0.5, then define the subnet mask for an assumed class C network (255.255.255.0) and then assign the address of your router, 192.168.0.1.
What if I put 192.168.0.1 manually as router?
Why it is blank now?
Why Server Assistant didn't assign to it 192.168.0.3 (the address of my actual router)?
Why it had assigned 127.0.0.1 as DNS?
This is the default setup on Snow Server. The server, when setup in absence of a DNS service, will configure DNS internally and then use itself as the reference. 127.0.0.1 is the loop back address. This is the machine referencing itself.
I suppose Server Assistant has done custom setup. So I'd like to restart it and repeate the initial procedure with new router attached.
But you should not need to go through the entire setup again. Just define your networking stack to what you want. If you change your IP or hostname, then you will need to run sudo changeip -checkhostname.