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Two Way Trusts

I have two domains. a.local and b.local. They are separate domains and forests. I need to create a trust between the two domains. They are both 2003 domains. I am migrating b into a, so I will probably need to create a new site in the a domain. Can someone please give me some guidance on how to do this and in what order? Thanks.

debuggerau

good info here:

http://technet.microsoft.com/en-us/library/cc740018(WS.10).aspx

Did you want a two way, one way, domain wide or forest wide trust?

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Also, if security is not a concen between these two forests(networks), then you can have your firewall wide open otherwise, you need these ports and protocol opened before creating the trust:

These are the ports and protocol require to open on both side of the firewall if trust is to be established between two domains:

UDP      135, 389, 53, 88, 445, (for NetBIOS: 137, 138)
TCP       135, 389, 636, 53, 88, 445, 1024-65535, (for NetBIOS: 139, 42)
ICMP      Dependency of port 139, also used by Windows Redirectors, Group Policy, MTU etc

Service Name             UDP       TCP
LDAP                   389       389
LDAP SSL             N/A       636
RPC Endpoint Mapper       135       135
Global Catalog LDAP       N/A       3268
Global Catalog LDAP SSL N/A       3269
Kerberos             88       88

Americom

BTW, one thing you must verify before creating the trust is to make sure DNS name resolution is working from the domain controllers between the two domains in the forests.