...
- However, access to a web server at the Beijing MA run by Guangzhou was not allowed.
- Also since the MAs from the PingER Android project did not want to have to run a web server, they needed a proxy to copy their data to. This proxy, in turn, has to be accessible from SLAC.
Solution
Since we could not initiate the gathering from the SLAC end, we chose to use the anonymous ftp service at SLAC (see https://www.slac.stanford.edu/comp/unix/ftp.html).
- Be aware data is only kept for 4 days in anonymous incoming FTP and then is removed. The directories are preserved. One can delete files and directories by using rm and rmdir on /afs/slac/public/incoming from the unix command line (one cannot delete files and directories within ftp).
- The anonymous FTP space is not accessible for reading from outside SLAC. This prevents the bad actors hosting illegal files here.
1. In this case, the MA (e.g. a script initiated at the Beijing MA and run at Beijing by say user Ann who does not have an account at SLAC) daily runs a script (as a cronjob) to use the incoming anonymous FTP at SLAC to store the day's data at SLAC. An example of an FTP session to copy a file is seen at the Proxy FTP script document.
...