SSH Tunnels

Goal §

Access the campus login portal and other services remotely through the server.

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Idea §

Use SSH port forwarding to access services running on the server or within the campus network.

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Command Used §

ssh -L 8090:gateway.iisertvm.ac.in:8090 akwastaken@<server-ip>

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What This Does §

• Opens a local port (8090) on the client (Mac)
• Forwards traffic to:
  • gateway.iisertvm.ac.in:8090 through the server
• Allows accessing the login portal via:

http://localhost:8090/httpclient.html

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Observations §

• Successfully opened the campus login portal remotely
• Could interact with the portal from the local machine
• Did not require direct access to server GUI

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Issues §

• Port conflicts if 8090 already in use
• Tunnel needs to be re-established manually
• Requires active SSH session
• Not persistent

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Variations Tried §

Background SSH:

ssh -f -N -L 8090:gateway.iisertvm.ac.in:8090 akwastaken@<server-ip>

Observed:

• runs without opening terminal session
• still fails if port already in use

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Limitations §

• Only solves access to specific services
• Does not provide full network connectivity
• Not a long-term solution for remote access

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Notes §

• Useful for quick access to internal portals
• Helped understand port forwarding
• Eventually replaced by VPN-based solutions