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Git Check Time of Client

Posted on 2016-09-12
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Last Modified: 2016-10-03
We need to check time of Client from where user is connecting to git server & refuse the connection if the time difference between the server & client is not correct by some margin.

Example : if the time on Server is 18:00 UTC & the time of client is 21:00 UTC, I would like to refuse connection.

I believe this should be forced at Linux Server Level.Please let me know how to accomplish this.
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Question by:sivaatluri
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LVL 34

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Duncan Roe earned 500 total points (awarded by participants)
ID: 41797161
I think you will have to write your own solution. What you need to do is connect to the client system on port 37 (the timeserver port) and read the client's idea of the time from there, as per RFC 868. This requires that clients support time service: under Linux, inetd supports time as an internal service (so it has to be enabled in /etc/inetd.conf); under Windows I do not know what to do, but likely you additionally have to enable port 37 in the firewall.
You can get a report of the time difference from the netdate utility (not run as root ;)
11:08:53$ netdate dwarfstar
netdate: settimeofday: Operation not permitted
dwarfstar -11.352        Wed Sep 14 11:11:17.000
11:11:28$ 

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Slackware has had netdate for ever. It's very old, and I couldn't easily find it on the web. I can post the source as an attachment if you like - it's only about 500 lines.

Do you need a plan for integrating your solution with the git server?
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LVL 34

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by:Duncan Roe
ID: 41826014
The proposed solution is certainly valid as far as it goes. It does require some effort on the part of the author to implement a working solution, but describes the steps necessary to achieve one.
The author has not seen fit to respond , so we have to assume he is content with this partial solution, and close it with a 'B'.
Should the author wish to keep the question open, he has 4 days to object to the proposed closure.
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