How do I validate my Gurobi academic license remotely, that is, from a computer that is not on my university network?
Official instructions for Gurobi 9.1 are here: https://www.gurobi.com/documentation/9.1/quickstart_mac/academic_validation.html, but these require a VPN.
There are old instructions for using an ssh tunnel on the (retired) google group https://groups.google.com/g/gurobi/c/MaEP4cun8o8?pli=1, but these no longer work.
Instead of a VPN, one can apparently use an ssh SOCKS proxy. This worked for me as of January 2021. Specifically, commands for enabling a SOCKS proxy on my mac are:
sudo networksetup -setsocksfirewallproxy 'Ethernet' 127.0.0.1 4088
sudo networksetup -setsocksfirewallproxy 'Wi-Fi' 127.0.0.1 4088
ssh -N -D 4088 <remote host>
Then, in a separate terminal window, run grbgetkey as usual.
grbgetkey <LICENSE KEY>
There are more complicated instructions for doing it via socks proxy without using grbgetkey at https://medium.com/@drfyp/validating-an-academic-gurobi-license-through-a-socks-proxy-on-macos-740f7d9527b4 that also worked for me as of January 2021. For the record, I'll try to paste an abbreviated version of those here:
[first, connect to a the remote computer via ssh SOCKS proxy,
see elsewhere, or the link above, for instructions on that]
In a text editor, write the following link:http://apps.gurobi.com/keyserver?id=<key>&hostname=<hostname>&hostid=<hostid>&username=<username>&os=mac64&localdate=<date>&version=<version>
<key>is a valid academic key obtained freely from the Gurobi website.
<hostname>is the hostname of the computer you’d like to create a license for.
<hostid>is the last 4 bytes of your computer’s MAC address in hexadecimal notation (e.g 2b90abcd).
<username>is your user name on the computer for which you are requesting a license.
<platform>is a string used by Gurobi to identify the OS of your computer (e.g. linux64).
<date>is today’s date in YYYY-MM-DD notation.
<version>is the version of Gurobi (e.g. 9)
Part of the information can be obtained by using the following command in the terminal of your computer:grbprobe
You get something like:info : grbprobe version 9.0.0, build v9.0.0rc2
CORES=4CPU=Intel(R) Core(TM) i7–4870HQ CPU @ 2.50GHz
The final link should be like:http://apps.gurobi.com/keyserver?id=61329999–9999–9999–9999-020d093b9999&hostname=JohnDoe-MacBook-Pro.local&hostid=2b90abcd&username=johndoe&os=mac64&localdate=2019-12-13&version=9
Open this link in your browser, you get a text like:RESULT=0 LICENSEID=389999 # DO NOT EDIT THIS FILE except as noted # # License ID 389999 TYPE=ACADEMIC VERSION=9 HOSTNAME=JohnDoe-MacBook-Pro.local HOSTID=2b90abcd USERNAME=johndoe EXPIRATION=2020-12-12 KEY=SK9ABC9V CKEY=SK9ABC9V
Copy this text in a new file with the following format, and save it as
gurobi.licin the home user directory of your computer:# DO NOT EDIT THIS FILE except as noted
# License ID 389999
You should now be able to use Gurobi.
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