[Samba] NT_STATUS_PIPE_DISCONNECTED error

[mapa3m]

Running  3.2.15 on RHEL 5.4 64-bit.

Joined the domain with no issues, able to look up id's with no
problem. Windows clients within the domain are able to use defined
shares. However, when trying to look up trusted domains, or when
trying to access shares from clients not in the domain (for example,
using smbclient), the following errors show up:

rpc_api_pipe: Remote machine <DC name here> pipe \NETLOGON fnum 0x8
returned critical error. Error was NT_STATUS_PIPE_DISCONNECTED
winbindd_dual_list_trusted_domains: trusted_domains returned
NT_STATUS_PIPE_DISCONNECTED



rpc_api_pipe: Remote machine <domain name> pipe \NETLOGON fnum 0x8
returned critical error. Error was NT_STATUS_PIPE_DISCONNECTED
NTLM CRAP authentication for user [DOMAIN]\[username] returned
NT_STATUS_PIPE_DISCONNECTED (PAM: 4)

I'm at a loss here. Googling didn't help, neither did the #samba
channel on freenode. Looking for help from the community at large.

Thank you!