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mrSuperEvening
Asked: 2013-10-19 14:36:27 +0800 CST

How to forward local port 80 to another machine?

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I want to port 127:0.0.1:80 to the other machine via SSH, how can I do that? I tried adding -R 8000:localhost:80, but it doesn't work. By the way, PHP is also installed on localhost, maybe that's why?

ssh

2 Answers

  1. Only root can bind ports numbered under 1024.

    The cleanest way is just to use local port 8000:

    ssh -R 8000:localhost:8000 otherhost

    Alternatively, 

    sudo ssh -R 8000:localhost:80 me@otherhost

    (It's really better not to run this as root for the sake of security - just use another port.)

    If you must use root, and you're using ssh private-key authentication, you may need to tell it which identity file to use. For example

    sudo ssh -i ~/.ssh/id_dsa -R 8000:localhost:80 me@otherhost
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  2. Judging from what you've just said in chat, this will let you access the server's port 80, from localhost:8080 (you'd need to run this as root to get it on localhost:80, which I don't advise if you can avoid it).

    ssh -L 8080:localhost:80 host
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