¶ HURCS Cluster Login Guide
¶ Prerequisites
Before connecting to the cluster, you need:
- CS or HURCS username
- Two passwords:
- IDng (Unix) password
- OTP (One-Time Password) from Google Authenticator, browser extension, or SMS
- SSH client (built into Linux/Mac, MobaXterm for Windows)
- For GUI applications: X11 server
¶ Network-Dependent Connection Methods
¶ Direct Connection (From University Network - Recommended)
If you are connected to:
- HUJI Eduroam
- University LAN
- University VPN
You can connect directly without using the jump server:
ssh <username>@moriah-gw.cs.huji.ac.il¶ External Connection (From Outside University Network)
When connecting from outside the university network, you must use the jump server (bava.cs.huji.ac.il).
¶ Important Notice
⚠️ Login nodes are low-resource virtual machines intended only for ⚠️
- Job submission
- File browsing via terminal
- Basic file operations
¶ Connection Methods by Operating System
¶ Linux and MacOS
From University Network (Direct Connection) :
ssh username@moriah-gw.cs.huji.ac.ilFrom External Network (Using Jump Server) :
ssh -J username@bava.cs.huji.ac.il username@moriah-gw.cs.huji.ac.il¶ Recommended Setup: SSH Config File
- Create and secure SSH directory:
mkdir -p ~/.ssh && chmod 700 ~/.ssh
touch ~/.ssh/config
chmod 600 ~/.ssh/config2.Add to ~/.ssh/config:
# Prevent disconnections
Host *
ServerAliveInterval 180
ServerAliveCountMax 2
# Configure jump host (for external access)
Host hurcs-proxy
User YOUR_USERNAME
HostName bava.cs.huji.ac.il
Port 22
# Configure cluster access
Host moriah
User YOUR_USERNAME
HostName moriah-gw.cs.huji.ac.il
Port 22
# Comment out ProxyJump when on university network
ProxyJump hurcs-proxy3.Connect using simplified command:
ssh moriah¶ Windows - MobaXterm
Instructions for connecting via MobaXterm on a Windows machine can be found here.
¶ Linux
From university network:
ssh -X username@moriah-gw.cs.huji.ac.ilFrom external network:
ssh -X -J username@bava.cs.huji.ac.il username@moriah-gw.cs.huji.ac.ilOr add to ~/.ssh/config:
Host moriah
ForwardX11 yes¶ MacOS
- Install XQuartz
- Use same commands as Linux
¶ Windows - Mobaxterm
Mobaxterm has a built in X server. The default configuration in Mobaxterm is to run X server.
Press “Settings” button to open “Mobaxterm Configuration” window.
Select X11 tab and see that option “Automatically start X server at Mobaxterm start up” is selected.
Right click on the session you configured for the cluster and select “Edit session”. Under “Advanced SSH settings” see that “X11-Forwarding” is selected.
