Access Options

Option 1: Web Access (Open OnDemand)

The easiest way to access SeaWulf is through Open OnDemand, a web-based interface for file management, job submission, and interactive sessions. You do not need to know or specify a login node when using Open OnDemand.

See the Open OnDemand Overview for details.

Option 2: SSH Access (Terminal)

Experienced users may prefer connecting through SSH for direct terminal access.

• Mac/Linux: Open Terminal and connect to either of the following:

  ssh <NetID>@login.seawulf.stonybrook.edu

  ssh <NetID>@milan.seawulf.stonybrook.edu

  Add -X for graphical applications.
• Windows: Use MobaXterm (recommended), PuTTY, or Windows Terminal with WSL.

Login Nodes

Users connecting through SSH will log in to one of SeaWulf’s primary entry points:

• login.seawulf.stonybrook.edu — routes to login1 or login2
• milan.seawulf.stonybrook.edu — routes to milan1 or milan2
• xeonmax.seawulf.stonybrook.edu

Each login node connects to a different set of compute resources. For guidance, see the SeaWulf Queues table .

Duo Authentication

All SSH and Open OnDemand connections use Duo Authentication. When prompted, approve the login request on your Duo-enrolled device.

For setup instructions or troubleshooting, see Duo Two-Step Login.

VPN Access

If you frequently log in, connecting through Stony Brook’s VPN allows you to authenticate with Duo only once per session. See the VPN service page for setup instructions.

Passwordless Access

You can enable passwordless SSH to simplify logins. See Passwordless SSH .