Re: question about data transfer
Thank you for your advice. Now i've desided to write a new application instead of using an existing protocol.But I'm a fresh men here, so not very clear with what should i do first,would you please give me some advices about this ? thank you very much! Sun yingming From:Bear Giles [EMAIL PROTECTED]Reply-To:openssl-users@openssl.orgTo:openssl-users@openssl.orgSubject:Re: question about data transferDate:Mon, 21 Nov 2005 21:28:01 -0700When you say "data stream", how much data are you talking about?If it's occasional data (e.g., updated every 5 minutes) it wouldprobably be easiest to use a HTTPS client using a "post" form.That lets you use a standard web server on the other end.Oneless thing to worry about.Another possibility is secured email, SMTP + TLS.If you have arelatively smart sensor (e.g., an embedded Linux system) you couldwrite a straightforward mail client that sends mail to the localmail server (on localhost).You can then letsendmail/postfix/exim/whatever forward the mail to your systemwith a secure connection.Again, one less thing to worry about.If it's close to continuous you should probably establish your ownnetwork connection instead of trying to piggyback on an existingservice.In any case you need to think about how you will handle networkconnectivity problems... and you will have dropped connections,high latency, etc.Can you drop the data on the floor?If notyou'll need to have an accurately timestamped data queue.That'snot hard to do (hint: NTP), but it will drive the design.Bearsun yingming wrote: I am trying to use ssl to secure a persistent data stream which is read form some sensors outside, and transfer it to a fixed pc on the interent. The most common use of ssl is Https,but i am confused that can https realize this application? i mean , as i know ,the Https is always works in Browser/Server mode ,is it realizable to use Https to transfer a persitent data stream,or i should choose other protocol like ftp? anyone who can help me is thankful Sun Yingming__OpenSSL Project http://www.openssl.orgUser Support Mailing Listopenssl-users@openssl.orgAutomated List Manager [EMAIL PROTECTED]使用 MSN Messenger 与联机的朋友进行交流 __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager [EMAIL PROTECTED]
Re: question about data transfer
Now i've desided to write a new application instead of using an existing protocol.But I'm a fresh men here, so not very clear with what should i do first,would you please give me some advices about this ? If you don't know what you are doing, re-use an existing protocol. If you insist on writing your own, make sure you understand RFC 3117. /r$ -- SOA Appliance Group IBM Application Integration Middleware __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager [EMAIL PROTECTED]
question about data transfer
HI: I am trying to use ssl to secure a persistent data stream which is read form some sensors outside, and transfer it to a fixed pc on the interent. The most common use of ssl is Https,but i am confused that can https realize this application? i mean , as i know ,the Https is always works in Browser/Server mode ,is it realizable to use Https to transfer a persitent data stream,or i should choose otherprotocol like ftp? anyone who can help me isthankful Sun Yingming请使用 MSN Messenger 与联机的朋友进行交流 __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager [EMAIL PROTECTED]
Re: question about data transfer
When you say data stream, how much data are you talking about? If it's occasional data (e.g., updated every 5 minutes) it would probably be easiest to use a HTTPS client using a post form. That lets you use a standard web server on the other end. One less thing to worry about. Another possibility is secured email, SMTP + TLS. If you have a relatively smart sensor (e.g., an embedded Linux system) you could write a straightforward mail client that sends mail to the local mail server (on localhost). You can then let sendmail/postfix/exim/whatever forward the mail to your system with a secure connection. Again, one less thing to worry about. If it's close to continuous you should probably establish your own network connection instead of trying to piggyback on an existing service. In any case you need to think about how you will handle network connectivity problems... and you will have dropped connections, high latency, etc. Can you drop the data on the floor? If not you'll need to have an accurately timestamped data queue. That's not hard to do (hint: NTP), but it will drive the design. Bear sun yingming wrote: I am trying to use ssl to secure a persistent data stream which is read form some sensors outside, and transfer it to a fixed pc on the interent. The most common use of ssl is Https,but i am confused that can https realize this application? i mean , as i know ,the Https is always works in Browser/Server mode ,is it realizable to use Https to transfer a persitent data stream,or i should choose other protocol like ftp? anyone who can help me is thankful Sun Yingming __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager [EMAIL PROTECTED]
