Windows 2003 authentication fails event id 1054, servers have a firewall in between

Hello, we have a windows 2003 server that is trying to authenticate
through a firewall but can't (event id 1054). We have these ports
opened on the firewall:
135
ldap
389
445
3268
domain
udp domain
88
udp 88
netbios-ssn
netbios-ns
netbios-dgm
But this is not helping. Does anybody have any suggestions as to what
ports exactly need to be opened in the firewall?
Thanks.
Rossella

Try this:

http://support.microsoft.com/default...b;en-us;179442

Doug Sherman
MCSE, MCSA, MCP+I, MVP

<(E-Mail Removed)> wrote in message
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> Hello, we have a windows 2003 server that is trying to authenticate
> through a firewall but can't (event id 1054). We have these ports
> opened on the firewall:
> 135
> ldap
> 389
> 445
> 3268
> domain
> udp domain
> 88
> udp 88
> netbios-ssn
> netbios-ns
> netbios-dgm
> But this is not helping. Does anybody have any suggestions as to what
> ports exactly need to be opened in the firewall?
> Thanks.
> Rossella
>