ITS General Computing

System Administration and Configuration FAQ

For more information, see the section of the ITS website for IT staff.

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What are the e-mail lists or groups or other communities I can join to stay informed about campus IT issues?

Here are some of the groups you can join. If your group or community is not listed here and you would like it to be, please let us know about it so we can add it.

What is the NTP (Network Time Protocol) server address?

The NTP (Network Time Protocol) server address for the University of Michigan is
What is the LDAP server address?

There are two LDAP server addresses for the University of Michigan:

The MCommunity Directory essentially replaced the U-M Online Directory in July 2011. The U-M Online Directory remains available via LDAP only for now to allow U-M departments time to migrate their applications and such to the new directory. For reference, see LDAP Access to the MCommunity Directory (R1463).

What is the incoming mail server address for ITS e-mail?

The incoming mail server address for ITS IMAP email is

For more detailed e-mail client configuration information for the ITS IMAP mail service, see Configuring Your E-Mail Program to Connect to the ITS E-Mail Service (S4321).

For configuration instructions for those who use the ITS Exchange Service, see the ITS Exchange Service website.

What is the outgoing mail (SMTP) server address?

The outgoing mail server address for the University of Michigan is

Please note that this server requires authentication.

See Configuring Your E-Mail Program to Connect to the ITS E-Mail Service (S4321) for configuration instructions for various email clients when using the ITS IMAP email Service. See the ITS Exchange Service website for configuration instructions for email clients connecting to the ITS Exchange Service.

The ITS Mail Relay Service is available for use by U-M machines and services that are not able to do authenticated SMTP.

What is the IMSP server name?

ITS runs an IMSP (Internet Message Support Protocol) server that stores preferences for Mulberry users. We use the Cyrus version of IMSP, and it supports GSSAPI authentication. The server name is
What are the DNS (Domain Name Service) addresses for U-M?

The DNS (Domain Name Service) addresses for the University of Michigan are

For assistance with DNS, contact

Whom do I contact for Domain Name Registration?

Names that End in

To register domain names that end in, contact Please also see the U-M Standard Practice Guide Policy 601.15-1 - Domain Name System Standards (18 KB PDF file). For information about virtual web hosting, see the umweb services page.

Third-Party Top-Level Domains

Faculty and staff who need to register third-party top-level domain names for University of Michigan can contact The ITS DNS Domain Name Registration group can register names in these domains and more: .org, .net, .com, .info, and .us. Note that there is a small per-year fee for such registration and that departmental approval is required. Payment must be made using a university account number.

How do I get Kerberos keytab?

Send your request to

When you no longer need your keytab, please alert the keytabs group so the unneeded keytab can be expired.

What are the names and port numbers of the Kerberos servers?

Here are the names and port numbers to use for the U-M Kerberos servers provided and maintained by ITS:


Kerberos Servers:

Kerberos Admin Server:

What are the names and IP addresses of the AFS database servers? How do I format this information for the CellServDB file?

Here are the names and IP addresses to use for the U-M AFS database servers provided and maintained by ITS:

AFS Cell:

AFS Database Servers:

The actual formatted data that would reside in the CellServDB file:

> # University of Michigan - Campus

AFSDB domain name service records are set up for the cell and can be used instead if you prefer.

For further assistance with configuration issues related to AFS, send email to

My question about system administration and configuration isn't in this list. Who can I ask for help?

The ITS Service Center can answer your questions about system administration and configuration.

These services are available to members of the University of Michigan community only.

How do I arrange to use the campus DHCP service?

DHCP (Dynamic Host Configuration Protocol) is a service that allows machines to get their IP addresses and other information assigned by the network themselves rather than having to have this done manually by a person. Basically, it allows a network administrator to attach a computer to a U-M network and then have that computer figure out its own configuration for connecting to the Internet automatically.

A new DHCP service is available for any school or department network on campus. This service is considered part of the campus computing infrastructure and is free of charge.