Re: USB point to point computer communications link
On Sat, Mar 28, 2015 at 12:26 AM, Yasha Karant ykar...@csusb.edu wrote: Customer Reviews 751 4.3 out of 5 stars 5 star http://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/product-reviews/B00BBD7NFU/ref=cm_cr_pr_hist_5?ie=UTF8filterByStar=five_star 497 http://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/product-reviews/B00BBD7NFU/ref=cm_cr_pr_hist_5?ie=UTF8filterByStar=five_star 4 star http://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/product-reviews/B00BBD7NFU/ref=cm_cr_pr_hist_4?ie=UTF8filterByStar=four_star 119 http://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/product-reviews/B00BBD7NFU/ref=cm_cr_pr_hist_4?ie=UTF8filterByStar=four_star 3 star http://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/product-reviews/B00BBD7NFU/ref=cm_cr_pr_hist_3?ie=UTF8filterByStar=three_star 44 http://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/product-reviews/B00BBD7NFU/ref=cm_cr_pr_hist_3?ie=UTF8filterByStar=three_star 2 star http://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/product-reviews/B00BBD7NFU/ref=cm_cr_pr_hist_2?ie=UTF8filterByStar=two_star 23 http://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/product-reviews/B00BBD7NFU/ref=cm_cr_pr_hist_2?ie=UTF8filterByStar=two_star 1 star http://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/product-reviews/B00BBD7NFU/ref=cm_cr_pr_hist_1?ie=UTF8filterByStar=one_star 68 http://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/product-reviews/B00BBD7NFU/ref=cm_cr_pr_hist_1?ie=UTF8filterByStar=one_star [image: Cable Matters SuperSpeed USB 3.0 to RJ45 Gigabit Ethernet Network Adapter in Black] http://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/dp/B00BBD7NFU/ref=cm_cr_pr_pdt_img_top?ie=UTF8 Thank you for that suggestion. Assuming I do want to use a RJ-45 crossover cable, the simplest solution is two of these devices plus a small 802.3 repeater. This private LAN will be invisible to any external surveillance. Does SL 7 have the necessary drivers? I have found: Cable Matters SuperSpeed USB 3.0 to RJ45 Gigabit Ethernet Network Adapter in Black http://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/dp/B00BBD7NFU/ref=cm_cr_pr_product_top?ie=UTF8 byCable Matters http://www.amazon.com/s/ref=cm_cr_pr_pdt_bl_sr?ie=UTF8field-keywords=Cable+Matters Size Name: USB 3.0Color Name: BlackChange http://www.amazon.com/Cable-Matters-SuperSpeed-Gigabit-Ethernet/dp/B00BBD7NFU/ref=cm_cr_pr_product_top?ie=UTF8 Price:$18.99 Although I am not requesting any specific brand endorsement, it would be useful to know of hardware that does work and is supported by SL 7 with maximum transparency for setting up a Internet protocol suite LAN over a USB to 802.3 LAN; I would probably use ssh and scp between the two machines. Both machines have working USB 3 ports under Linux (SL 7 in one case, OpenSUSE 13.2 on the other). Yasha Karant Commenting on an old thread: it's a GigE device, you don''t need a crossover cable. GigE is hermaphroditic, meaning it figures out cross-over ifor CAT5 and CAT6 cable and just deals with it. And at $20 each, just keep your receipts and hand it back if it doesn't work.
Re: USB point to point computer communications link
On 03/26/2015 06:51 PM, Kevin K wrote: On Mar 26, 2015, at 6:37 PM, Yasha Karant ykar...@csusb.edu wrote: My desktop workstation (currently X86-64 SL 7) has only one 802.3 physical port. At my university, the IT gestapo will not allow the use of a local 802.3 repeater (switch or hub) but requires a valid NIC MAC address and will disconnect any changes. I have no 802.11 WNIC on my desktop workstation. I just have obtained a new HP Zbook to run X86-64 Linux to replace my old mobile workstation (laptop) that was underprovisioned for 64 bit operation, had a worn out keyboard and pointing device, etc. (I regret to state that I am experimenting with OpenSUSE 13.2 on that machine for reasons beyond the subject matter of this post.) The IT gestapo will not allow my workstation to serve as a HTTP server, etc. -- one cannot use scp, sftp, etc., for file transfer over the IT network from a desktop workstation (not a designated server). I could attempt to transfer all of the files to the research network that has much less IT gestapo control -- but this is as tedious as what I am now doing. H ence, a question: Is there a software application utility that will convert a USB network between two machines running standard open systems protocols to allow file transfer between the two machines? I am not referring to the methods used with an Android device, but with a regular Linux workstation. A cursory search of such things on the web did not provide any insight. At one time, UUCP would do this over a RS232 point-to-point link (cable) -- will this approach still work over a USB (not RS232) link? Is there something better than UUCP? Are you wanting to do a one time transfer between the two computers? Or be able to get both on the net at the same time? For 1 time use, I would suggest a crossover cable. Configure one to allow the SSH daemon to run, and copy files using scp or sftp. If you want both to connect to the net at the same time, and be able to talk to each other, then an inexpensive NAT router should do the trick. Unless they are running special software that can detect that you have multiple computers attached to it, there should be no issue. You still wouldn’t be able to connect BACK to your computer from outside if servers aren’t allowed. Behind NAT, your workstation should be able to be a server to the zbook. If all you are looking for is file transfer, is there a any reason why a USB drive is not a viable option? With USB length limits, it sounds like the 2 machines will be in the same room with physical access. Have you considered just adding a second NIC to the desktop for use with the laptop? I recall seeing USB link devices for migrating Windows systems between computers several years ago, but do not have any experience with them.
Re: USB point to point computer communications link
Yasha, this is getting tiresome - your continuing use of this mailing list to obtain free technical support for (imho) bizarre problems or wishes - most of them complete with pity pledges please help me, our IT nazi would give me no soup (as in Soup Nazi, http://en.wikipedia.org/wiki/The_Soup_Nazi, not the other, bad, nazis). If your IT problems are real, and if they negatively affect your work productivity, why don't you have the boss of your boss have a talk with the boss of the boss of the IT departement's boss to straighten it all out? If you work at a university, you must know how this works. K.O. On Thu, Mar 26, 2015 at 04:37:34PM -0700, Yasha Karant wrote: My desktop workstation (currently X86-64 SL 7) has only one 802.3 physical port. At my university, the IT gestapo will not allow the use of a local 802.3 repeater (switch or hub) but requires a valid NIC MAC address and will disconnect any changes. I have no 802.11 WNIC on my desktop workstation. I just have obtained a new HP Zbook to run X86-64 Linux to replace my old mobile workstation (laptop) that was underprovisioned for 64 bit operation, had a worn out keyboard and pointing device, etc. (I regret to state that I am experimenting with OpenSUSE 13.2 on that machine for reasons beyond the subject matter of this post.) The IT gestapo will not allow my workstation to serve as a HTTP server, etc. -- one cannot use scp, sftp, etc., for file transfer over the IT network from a desktop workstation (not a designated server). I could attempt to transfer all of the files to the research network that has much less IT gestapo control -- but this is as tedious as what I am now doing. Hence, a question: Is there a software application utility that will convert a USB network between two machines running standard open systems protocols to allow file transfer between the two machines? I am not referring to the methods used with an Android device, but with a regular Linux workstation. A cursory search of such things on the web did not provide any insight. At one time, UUCP would do this over a RS232 point-to-point link (cable) -- will this approach still work over a USB (not RS232) link? Is there something better than UUCP? Yasha Karant -- Konstantin Olchanski Data Acquisition Systems: The Bytes Must Flow! Email: olchansk-at-triumf-dot-ca Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada
Re: USB point to point computer communications link
That second NIC appears to be my only option. A colleague down the hall does exactly that. If I did attempt NAT, as was suggested, unless the device actually attached to the RJ-45 802.3 LAN port in the wall has the exact same MAC address, etc., as the NIC on my workstation, the local IT gestapo will disconnect my wall port and block all traffic -- until such time as the IT gestapo is instructed to detect the replacement NIC. This presents problems whenever there is a NIC failure or a replacement workstation. Instead, our illustrious gestapo requires us to use Eduroam over 802.11 -- but refuses to allow any standard server daemons on a workstation for file transfer. I can upload and download to a remote server as required -- is there a secure remote server that will allow mutli-Gbyte transfers and will allow https initiated download access via a web browser? I do NOT want to put files on a site that may corrupt, infect, or redistribute these. I was hoping to use USB 3 rather than 802.3 as the transfer. A USB stick does work, but then one is back to sneaker-net. Thanks for the suggestions. Yasha Karant On 03/27/2015 07:18 AM, Ken Teh wrote: I was about to suggest Mark's point about the second nic in the desktop. It seems to me the easiest and most versatile. And a small switch to connect the laptop and the desktop (on the second nic). No cross-over cable. A small disjoint lan with hard-wired addresses in /etc/hosts. You can add as many machines as you have ports on the switch. You could even turn your desktop into a NAT gateway if you wish. On 03/27/2015 08:38 AM, Mark Stodola wrote: On 03/26/2015 06:51 PM, Kevin K wrote: On Mar 26, 2015, at 6:37 PM, Yasha Karant ykar...@csusb.edu wrote: My desktop workstation (currently X86-64 SL 7) has only one 802.3 physical port. At my university, the IT gestapo will not allow the use of a local 802.3 repeater (switch or hub) but requires a valid NIC MAC address and will disconnect any changes. I have no 802.11 WNIC on my desktop workstation. I just have obtained a new HP Zbook to run X86-64 Linux to replace my old mobile workstation (laptop) that was underprovisioned for 64 bit operation, had a worn out keyboard and pointing device, etc. (I regret to state that I am experimenting with OpenSUSE 13.2 on that machine for reasons beyond the subject matter of this post.) The IT gestapo will not allow my workstation to serve as a HTTP server, etc. -- one cannot use scp, sftp, etc., for file transfer over the IT network from a desktop workstation (not a designated server). I could attempt to transfer all of the files to the research network that has much less IT gestapo control -- but this is as tedious as what I am no w doing. H ence, a question: Is there a software application utility that will convert a USB network between two machines running standard open systems protocols to allow file transfer between the two machines? I am not referring to the methods used with an Android device, but with a regular Linux workstation. A cursory search of such things on the web did not provide any insight. At one time, UUCP would do this over a RS232 point-to-point link (cable) -- will this approach still work over a USB (not RS232) link? Is there something better than UUCP? Are you wanting to do a one time transfer between the two computers? Or be able to get both on the net at the same time? For 1 time use, I would suggest a crossover cable. Configure one to allow the SSH daemon to run, and copy files using scp or sftp. If you want both to connect to the net at the same time, and be able to talk to each other, then an inexpensive NAT router should do the trick. Unless they are running special software that can detect that you have multiple computers attached to it, there should be no issue. You still wouldn’t be able to connect BACK to your computer from outside if servers aren’t allowed. Behind NAT, your workstation should be able to be a server to the zbook. If all you are looking for is file transfer, is there a any reason why a USB drive is not a viable option? With USB length limits, it sounds like the 2 machines will be in the same room with physical access. Have you considered just adding a second NIC to the desktop for use with the laptop? I recall seeing USB link devices for migrating Windows systems between computers several years ago, but do not have any experience with them.
Re: USB point to point computer communications link
It isn’t so much the USB. USB as a design is a master/slave relationship. So you cannot connect 2 normal computers together with an USB cable. It doesn’t matter what you are wanting to do with it. There have been special USB cables in the past with some smarts in the middle so each computer thinks that it is talking to the middle, and it connects the 2. Whether they emulated serial cables, or LAN, I don’t recall. It has been years, and I never needed one. The 2 best suggestions so far has been to put in a second NIC in the desktop, and configure the Linux desktop to act as the NAT gateway for the portable. Or just get a NAT router, and have it clone the desktop’s MAC address so it doesn’t look any different to the IT department. Neither of these are a solution if you are in an environment where you don’t own the connected computers. On Mar 27, 2015, at 5:30 PM, Yasha Karant ykar...@csusb.edu wrote: The university system at which I am tenured has limited practical respect for Faculty but much lipservice to the concept -- that is the reality. I simply was asking if such a utility existed within EL or Linux in general -- it evidently does not. UUCP does not easily work over USB although at one time it did work for point-to-point RS-232 connections. In the future, I will omit the background as to why I post such a request for a utility, merely that I need such a utility if it exists. In the best of all possible worlds -- not this one -- I would have a grad student, or even a talented undergrad, see if UUCP could be modified. For now, I am using the modern equivalent of sneaker net. Sorry to have bothered you. Yasha Karant On 03/27/2015 12:37 PM, Konstantin Olchanski wrote: Yasha, this is getting tiresome - your continuing use of this mailing list to obtain free technical support for (imho) bizarre problems or wishes - most of them complete with pity pledges please help me, our IT nazi would give me no soup (as in Soup Nazi, http://en.wikipedia.org/wiki/The_Soup_Nazi, not the other, bad, nazis). If your IT problems are real, and if they negatively affect your work productivity, why don't you have the boss of your boss have a talk with the boss of the boss of the IT departement's boss to straighten it all out? If you work at a university, you must know how this works. K.O. On Thu, Mar 26, 2015 at 04:37:34PM -0700, Yasha Karant wrote: My desktop workstation (currently X86-64 SL 7) has only one 802.3 physical port. At my university, the IT gestapo will not allow the use of a local 802.3 repeater (switch or hub) but requires a valid NIC MAC address and will disconnect any changes. I have no 802.11 WNIC on my desktop workstation. I just have obtained a new HP Zbook to run X86-64 Linux to replace my old mobile workstation (laptop) that was underprovisioned for 64 bit operation, had a worn out keyboard and pointing device, etc. (I regret to state that I am experimenting with OpenSUSE 13.2 on that machine for reasons beyond the subject matter of this post.) The IT gestapo will not allow my workstation to serve as a HTTP server, etc. -- one cannot use scp, sftp, etc., for file transfer over the IT network from a desktop workstation (not a designated server). I could attempt to transfer all of the files to the research network that has much less IT gestapo control -- but this is as tedious as what I am now doing. Hence, a question: Is there a software application utility that will convert a USB network between two machines running standard open systems protocols to allow file transfer between the two machines? I am not referring to the methods used with an Android device, but with a regular Linux workstation. A cursory search of such things on the web did not provide any insight. At one time, UUCP would do this over a RS232 point-to-point link (cable) -- will this approach still work over a USB (not RS232) link? Is there something better than UUCP? Yasha Karant
Re: USB point to point computer communications link
On Fri, Mar 27, 2015 at 6:51 PM, Kevin K kevi...@fidnet.com wrote: It isn’t so much the USB. USB as a design is a master/slave relationship. So you cannot connect 2 normal computers together with an USB cable. It doesn’t matter what you are wanting to do with it. Use two USB ethernet ports. They're cheap, most of them work quite well with Linux, they're handy for other uses, and easily configured for little private, non-routable VLAN. Since most modern such ports are GigE compatible, the connections are hermaphroditic, and you won't even need a crossover cable. And the USB ethernet ports are invaluable when confronted with broken wireless environments. I always keep one in my emergency computer widgets bin.
USB point to point computer communications link
My desktop workstation (currently X86-64 SL 7) has only one 802.3 physical port. At my university, the IT gestapo will not allow the use of a local 802.3 repeater (switch or hub) but requires a valid NIC MAC address and will disconnect any changes. I have no 802.11 WNIC on my desktop workstation. I just have obtained a new HP Zbook to run X86-64 Linux to replace my old mobile workstation (laptop) that was underprovisioned for 64 bit operation, had a worn out keyboard and pointing device, etc. (I regret to state that I am experimenting with OpenSUSE 13.2 on that machine for reasons beyond the subject matter of this post.) The IT gestapo will not allow my workstation to serve as a HTTP server, etc. -- one cannot use scp, sftp, etc., for file transfer over the IT network from a desktop workstation (not a designated server). I could attempt to transfer all of the files to the research network that has much less IT gestapo control -- but this is as tedious as what I am now doing. Hence, a question: Is there a software application utility that will convert a USB network between two machines running standard open systems protocols to allow file transfer between the two machines? I am not referring to the methods used with an Android device, but with a regular Linux workstation. A cursory search of such things on the web did not provide any insight. At one time, UUCP would do this over a RS232 point-to-point link (cable) -- will this approach still work over a USB (not RS232) link? Is there something better than UUCP? Yasha Karant
Re: USB point to point computer communications link
On Mar 26, 2015, at 6:37 PM, Yasha Karant ykar...@csusb.edu wrote: My desktop workstation (currently X86-64 SL 7) has only one 802.3 physical port. At my university, the IT gestapo will not allow the use of a local 802.3 repeater (switch or hub) but requires a valid NIC MAC address and will disconnect any changes. I have no 802.11 WNIC on my desktop workstation. I just have obtained a new HP Zbook to run X86-64 Linux to replace my old mobile workstation (laptop) that was underprovisioned for 64 bit operation, had a worn out keyboard and pointing device, etc. (I regret to state that I am experimenting with OpenSUSE 13.2 on that machine for reasons beyond the subject matter of this post.) The IT gestapo will not allow my workstation to serve as a HTTP server, etc. -- one cannot use scp, sftp, etc., for file transfer over the IT network from a desktop workstation (not a designated server). I could attempt to transfer all of the files to the research network that has much less IT gestapo control -- but this is as tedious as what I am now doing. Hence, a question: Is there a software application utility that will convert a USB network between two machines running standard open systems protocols to allow file transfer between the two machines? I am not referring to the methods used with an Android device, but with a regular Linux workstation. A cursory search of such things on the web did not provide any insight. At one time, UUCP would do this over a RS232 point-to-point link (cable) -- will this approach still work over a USB (not RS232) link? Is there something better than UUCP? Are you wanting to do a one time transfer between the two computers? Or be able to get both on the net at the same time? For 1 time use, I would suggest a crossover cable. Configure one to allow the SSH daemon to run, and copy files using scp or sftp. If you want both to connect to the net at the same time, and be able to talk to each other, then an inexpensive NAT router should do the trick. Unless they are running special software that can detect that you have multiple computers attached to it, there should be no issue. You still wouldn’t be able to connect BACK to your computer from outside if servers aren’t allowed. Behind NAT, your workstation should be able to be a server to the zbook.