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Ciao. In order to try and find a (user allowed) way to overcome network limitations in HPC sites, we were trying to use tsocks. In this way, we can ~ establish a VPN without the need to be root or such. The system used "ssh -D" (today) or "openconnect" (tomorrow) to establish the connection, and it seems transparent to most (!) of the user commands we tried. For example, the machine we are on has no connectivity to PISA, but a "tsocks ssh [log in to unmask]" (or the bare command with a proper LD_PRELOAD) works just fine. So, we are confident the basic routing table works (wget is ok, scp is ok, etc etc etc). BUT: xrdcp does not like it, and a command like xrdcp -d 3 root:// stormfe1.pi.infn.it//store/mc/SAM/GenericTTbar/AODSIM/CMSSW_9_0_0_90X_mcRun1_realistic_v4-v1/10000/28B9D1FB-8B31-E711-AA4E-0025905B85B2.root . stops with [2020-08-04 16:19:56.308921 +0200][Error ][AsyncSock ] [ stormfe1.pi.infn.it:1094 #0.0] Socket error while handshaking: [ERROR] Socket error [2020-08-04 16:19:56.309017 +0200][Debug ][AsyncSock ] [ stormfe1.pi.infn.it:1094 #0.0] Closing the socket [2020-08-04 16:19:56.309228 +0200][Debug ][Poller ] <[::ffff:127.0.0.1]:30547><--><[::ffff:127.0.0.1]:5555> Removing socket from the poller So question is: is there any trivial reason why XrootD protocol should not be able to route via a tsocks? thanks a lot mirko, daniele, tom -- Tommaso Boccali INFN Pisa ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1