I am, perhaps unfortunately, quite familiar with Sharepoint. Your sharepoint server like any other member server can be a member of one domain. If your extranet users are in a domain trusted by the server's domain or another domain in the forest, you can just service them with multiple portals. You can have up to I think its 50 portals per frontend. Of course, I don't really recommend having your extranet accounts in your corp forest...
I used to have my sharepoint environment sitting in a "DMZ" subnet. It was hell dealing with the spaghetti mess of ports on the checkpoints. Now we have this special subnet that the WAN people call the AD Load Balanced subnet. It's a class C that sits on the Cisco CSM and SSM modules in a couple of 6509s. The subnet hangs off a PIX FWSM vlan interface, and they have all the ports for domain joined machines open from that subnet to the DCs. It's actually pretty easy. The Windows folks gave the WAN folks a comprehensive list of ports that need to be open for AD, a/v, mgmt, etc, and they made PIX and Checkpoint rules for that subnet. Now when we need to load balance anything domain joined, the servers just go in this subnet, they setup the CSMs, and then the firewall people just have to add additional special rules (like connecting to SQL, for example). Thanks, Brian Desmond [EMAIL PROTECTED] c - 312.731.3132 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jason B Sent: Thursday, September 08, 2005 4:37 PM To: [email protected] Subject: Re: [ActiveDir] Which ports to open in the DMZ to communicate with AD & SQL... This has been a GREAT discussion and I have received a lot of useful info. I really appreciate the replies, suggestions, slams and help. I think I am going to revisit trying to have the sharepoint server moved to the LAN and see if I can't convince the powers that be to apportion an ISA license and hardware appropriate for running ISA to put on the DMZ. We already have a sharepoint server on the LAN... I am not too familiar with sharepoint, but I wonder if the existing sharepoint server can handle both the internal and external users... That's a question for another group, I guess. Anyway, I gathered quite a bit from the posts and discussion, but what are the main specific and concrete points that I am going to want to bring up to dissuade them from having the sharepoint server on the DMZ? My expertiese isn't in the hardware/networking aspect of configuration, but I know enough that I am not comfortable opening all the ports for AD auth from the DMZ to the LAN. Our network admin didn't think that it was a big deal to open the ports since it was "only on the DMZ" and he could control the traffic that was allowed to the DMZ. ----- Original Message ----- From: "Al Mulnick" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, September 07, 2005 5:04 PM Subject: RE: [ActiveDir] Which ports to open in the DMZ to communicate with AD & SQL... Looks like we have plenty of ideas and opinions ;) ISA is a great way to deal with this, but I believe the decision was made to put the SP machine in the DMZ regardless of the technical merit or viability. And whether or not it is a good idea. That said, ISA doesn't offer much if you put it AND this machine in a semi-trusted network (for whatever that means these days.) Shame there's no leeway though. The downside to using IPSec is that as others have pointed out, it won't work on member server <->DC for W2K servers (limitation of the OS) but will for 2K3 member servers but that still leaves you with a secure channel from the DMZ host to your internal network. That means you can't monitor the traffic from the DMZ to your internal network because it's encrypted (sounds like a broken record, I know.) Too bad you can't sway the decision makers to do this differently. But hopefully you've received a lot of ideas to pick from. Best of luck, Al ________________________________ From: [EMAIL PROTECTED] on behalf of Bernard, Aric Sent: Wed 9/7/2005 7:40 PM To: [email protected] Subject: RE: [ActiveDir] Which ports to open in the DMZ to communicate with AD & SQL... I agree with Phil - I think using an ISA (or other reverse proxy solution) is the best way to go given your constraints. Using a reverse proxy solution allows you the following: 1. Keep you Sharepoint server behind the firewall, yet make it accessible to external clients as if it was in the DMZ. 2. Restrict your [additional] holes through the firewall to only that needed by the reverse proxy solution to interact with the Sharepoint server (port 80). BTW - this scenario is becoming extremely common. The next common addition you will see to this will likely be the use of ADFS to provide an identity trust bridge between the internal forest and a partner forest (or other identity system). Regards, Aric Bernard ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Phil Renouf Sent: Wednesday, September 07, 2005 9:20 AM To: [email protected] Subject: Re: [ActiveDir] Which ports to open in the DMZ to communicate with AD & SQL... I would look at putting the Sharepoint server on the internal network and deploy an ISA server in the DMZ and use Web Publishing or Server Publishing to get your external clients access to the site. If you want to open access from the DMZ to your AD Forest your firewall will be swiss cheese from all the ports than need to be open. If you absolutely HAVE to then I would prefer to look at using IPSec for communication between the Sharepoint box and your DC's. That leaves you only needing the IPSec port open and not the very large number of ports to support AD communication. http://support.microsoft.com/kb/q179442/ Phil On 9/7/05, Jason B <[EMAIL PROTECTED]> wrote: Because this will be a sharepoint server for clients. Regardless, that decision has already been made and I don't have any input into it. Any info on the ports I'd need open? ----- Original Message ----- From: "ASB" <[EMAIL PROTECTED]> To: < [email protected] <mailto:[email protected]> > Sent: Wednesday, September 07, 2005 8:45 AM Subject: Re: [ActiveDir] Which ports to open in the DMZ to communicate with AD & SQL... Why did you decide to put it in the DMZ? -ASB On 9/7/05, Jason B <[EMAIL PROTECTED]> wrote: > We are putting a MS sharepoint server in the DMZ and need to have it on > the > domain and communicating with a SQL server on the domain. Because of > these > needs, we only want to open the minimum number of ports to get > functionality. We have LDAP (389) opened and SQL (1433) opened. What > other > ports will we need to open to be able to log in on the sharepoint server > with a domain account? Currently, with only these two ports opened, a > domain account can't log on to the sharepoint server in the DMZ. 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