Ports under 1024

[Len Padson]

On my mac, I cannot create a server on any port less than 1024. How do I fix this? Id like to not have to use port forwarding, but if that is necessary, could somebody please explain how? Thank you!!!

[Henry Wong]

Len Padson wrote:On my mac, I cannot create a server on any port less than 1024. How do I fix this? Id like to not have to use port forwarding, but if that is necessary, could somebody please explain how? Thank you!!!

I believe that only the root user can use ports less than 1024 -- and it is likely for a security reason. So, your only option is to run your program as the root user.

Henry

[Jeff Verdegan]

Henry Wong wrote:

Len Padson wrote:On my mac, I cannot create a server on any port less than 1024. How do I fix this? Id like to not have to use port forwarding, but if that is necessary, could somebody please explain how? Thank you!!!

I believe that only the root user can use ports less than 1024 -- and it is likely for a security reason. So, your only option is to run your program as the root user.

Henry

Yes, that is correct. I know that certain Linux flavors support administrative options that let non-root users open ports < 1024, but I don't know if Mac has something similar. I'd avoid those ports if possible, and if not possible, you'll have to do it as root. Turning on the setuid bit on your java executable may also work, but that's pretty risky in itself.