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Can't authenticate - PDC w/ multiple IPs

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6 replies

by rong

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We have leased a subnet of Internet IPs from AT&T, unfortunatly since we have been buying so many new computers, we have just run out of IP addresses. We are looking to change providers and upgrade our fractional T1 (256k) to a full 1.55mb T1 and get a larger pool of IPs. In the mean time, I'm trying to set our "non-production" machines, such as our Training Room PCs, to 10.0.0.xxx addresses. All of our servers were set to the ips we had leased from AT&T (216.xxx.xxx.xxx) so I went into their tcp/ip properties under advanced and added 10.0.0.xxx with a subnet of 255.255.255.0 to each server. The training room pcs can connect to our MS SQL server fine with the 10.0.0.xxx address, but my problem is that they can no longer authenticate to ourPDC. For now I have added IPX to both the training pcs and the PDC, but I'd much rather have them working in TCP/IP. Any ideas?

6 replies

by jsewell

create and/or add entry to C:\winnt\system32\drivers\etc\lmhosts (not lmhosts.sam)

209.xxx.xxx.x "Domain name \0x1C" #PRE
209.xxx.xxx.x PDCNAME #PRE #DOM:DOMAINNAME
209.xxx.xxx.x BDCNAME #PRE #DOM:DOMAINNAME
see the lmhosts.sam file for important formatting requirements......

by burcjo

You didn't specify the IP addresses of any of your DOMAIN Controllers... Make sure your PDC is "Dual Bound" with an IP Address within your 10.0.0.xxx network under advanced IP Properties. Also, you will need to make sure(If you decide not to go the LMHOSTS method as mentioned above) make sure both the PDC(or at least 1 domain controller) and any new machines have a route to the WINS server.

Then you will authenticate correctly.

by rong

More detailed info:
The workstations are Win98 systems
PDC: EMAIL - 216.xxx.xxx.xxx
BDC: APPS - 216.xxx.xxx.xxx

Went to Advanced properties of TCP/IP on both and added EMAIL 10.0.0.250 and APPS 10.0.0.251.

I tried the LMHOSTS suggestion, didn't work. Here is what I tried:
10.0.0.250 "youngsnt /0x1C" #PRE
10.0.0.250 EMAIL #PRE #DOM:youngsnt
10.0.0.251 APPS #PRE #DOM:youngsnt

However, just as a test I installed Win98's Internet Connect Sharing on an extra box we have sitting around... set it up with 2 nics one with a 216.x.x.x ip and one with 10.0.0.1... setup the training machines with 10.0.0.1 as the gateway.. set the LMHOSTS with:
216.x.x.x "youngsnt /0x1C" #PRE
216.x.x.x EMAIL #PRE #DOM:youngsnt
216.x.x.x APPS #PRE #DOM:youngsnt

Was able to authenticate but not map to any network drives on the other servers that I added 10.x.x.x addresses to.

Is there maybe some other settings on the servers I need to change to make the 10.x.x.x addresses active? I'm able to ping all 8 servers with their 10.x.x.x addresses but unable to see their shares with "\\10.x.x.x" or their Netbios names.
I'm officially going nuts ;) It seems so simple. Thanks to everyone that helps :)

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