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There's numerous other answers that have similar problems but I can't find any that deal with my situation:. Edit 2: Thanks to Simon Sutter for his comments. I have updated to Ubuntu This is what I get with wget :. Interestingly from that google makes an IPv6 request but stackoverflow doesn't. However a further check shows that I have an issue with bitbucket.
I did some further checking on this by disabling IPv6 but that made no difference - as in I get the same errors when running curl or wget. If it is a certificate error somewhere in the chain I know that I did install a work CA certificate when I first setup the computer. I think I've made some progress with my Ubuntu problems.
It works on a separate Ubuntu 16 laptop that I've tried. Further, I think I've tracked it down to a firewall issue via this Security. SE answer and the handling of TLS v1. I tracked down which sites I could access vs not access above.Breaking Down the TLS Handshake
An interesting example is bitbucket. The very boring answer to this is that I was behind a firewall. I'd ruled out a firewall because it was blocking things like google. It turns out that because I'm new in the company I have some configuration I suspect it's just that my MAC is recognised on new company laptop even though it's a fresh Ubuntu install that means that my traffic gets intercepted by the firewall.
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Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. I was evaluating some SSL failures, and noticed that when I use curl to one of the failing sites, I got curl: 56 SSL read: errno ; however, my google queries for that error didn't show the reason for the openssl failure.
Question : What does it mean when curl fails with curl: 56 SSL read: errno ? The root cause of the issue wound up being a layer2 MTU mismatch, which caused the openssl socket to time out part of the way through the curl transaction.
Full MTU-sized packets i. Other people seeing this error may not have an MTU mismatch, but it could be anything that causes an SSL session to timeout part of the way through the curl. Sign up to join this community. The best answers are voted up and rise to the top. Asked 6 years, 8 months ago. Active 7 months ago. Viewed 41k times.
I'm including the complete curl below Mike Pennington Mike Pennington 7, 9 9 gold badges 36 36 silver badges 83 83 bronze badges. Active Oldest Votes. May I know how you fix your issue? Thank you. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Tales from documentation: Write for your clueless users.Add text to boxplot ggplot2
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Can somebody please help me out with this? Etonkovidova zeljkofilipin Can you please guide me for this? Since I am new to Ubuntustruggled for almost 2 days before posting the issue,tried with all possible commands to make it work. Thanks for the pointers.
As far as I have understood, this is resolved. Please reopen if the problem is not fixed. If there is another problem, please create a new task. Create Task. Edit Task Edit Related Tasks View All 14 Subscribers.
Priyajha22 Oct 15PM. Getting below error after doing vagrant up in Ubuntu The error message, if any, is reproduced below. Please fix this error and try again. Related Objects. Mentioned Here T Outreachy microtask: Automation testing framework setup and running existing Echo node. Event Timeline. Priyajha22 triaged this task as High priority. Oct 15PM. Priyajha22 created this task. Aklapper raised the priority of this task from High to Needs Triage. An error occurred while downloading the remote file.
The URL in the screenshot works for me on my internet connection. Aklapper changed the task status from Open to Stalled. Show Details Oct 16PM.
Show Details. Oct 16PM. In TPriyajha22 wrote:. As silly as it sounds, this might have been just a network issue.GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. When my device posting the data to server via https, i'm seeing this below error by curl frequently. Libcurl is configured with OpenSSL. On seeing the errnoi can understand that the connection is getting closed by peer when SSL read happens.
I googled it to understand what condition the server would close the connection but couldn't get. Can you help me to resolve this issue. To me, this sounds like the server is prematurely closing the connection. Since the server isn't supposed to do this, it isn't easy to tell why it does this.
No response, and this is probably a server issue even if the curl error message for this could use improvements. Skip to content. Dismiss Join GitHub today GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.
Sign up. New issue. Jump to bottom. Copy link Quote reply. I did this When my device posting the data to server via https, i'm seeing this below error by curl frequently. Sign up for free to subscribe to this conversation on GitHub. Already have an account? Sign in. Linked pull requests. You signed in with another tab or window. Reload to refresh your session.
You signed out in another tab or window.GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. Curl fails on some sites e. I don't see what curl does wrong here.
OpenSSL returns this error to us I made a mistake it looks I did reproduce it but what happened was the curl error was embedded in the terminal output instead of at the end of it which doesn't usually happen:. I tried some versions on Windows and I get the same error. A very old version of curl works fine though:. I believe this may be an invalid Content Length Error?
The curl error buffer -v is not being cleared before outputting all of the additional available message thus it is being erroneously inserted into the content.? I don't think that's the case.
I don't see any evidence of such a wrong-doing, not to mention how difficult it would be to actually do such a mistake in the code. That hints on the same problem: the connection gets closed prematurely. I don't know why you'd only see this with curl or why the others hide the problem but clearly it also happens when you use squid, which then isn't curl getting the problem first-hand anymore.
I don't have a way to bisect this. No error consistently with this super old version, but building from the repo doesn't work that far back for me:. In Windows I get errors curl 7.
Can anyone reproduce both ways with a single sslbackend to get a bisect? It is likely a server issue but still I'm curious what makes the difference. If you can add anything to the existing issue then please do so and highlight how your input does that. Just pasting a problem that sounds similar or even is the exact same thing adds very little value to the process of finding and fixing the issue. I also manually edited your post to make it less excessive in length. You seem to see the same thing as bog-dan-ro.
The connection is suddenly reset and OpenSSL then reports this error. I don't see a curl bug here. I have improved the error message so with the current git master curl it should better explain what OpenSSL considers the error to be. New, TLSv1. I think it's an error also related to WinSockets that the socket is closed while curl tries to use the socket again.
If i insert a sleep with at least 0. If you are aware of a bug in the latest version of curl and have a self-contained example that we can use to reproduce then please open a new issue. It's debatable whether it's a bug but the error message sure is confusing.All my heart crochet blanket pattern
I generated self signed certificates on the server and installed them on the ARM computer, but it won't connect, clearly due to a certificate issue:.
So I'm confident the server is setup correctly, and I do get the concept of installing the certificates. More information: I tried openssl verify on the certificates on the ARM machine the self signed, and the server certificate :. This is definitely not an issue of certificate validation. As you can see, it has send 0 bytes and got 0 bytes. This means the SSL handshake was not even started and therefore the client could have not received any certificates and therefore it can not be a problem with certificate validation.
This means that either the server closed the connection maybe due to problems with the setup or that the server was not even started or that there is some firewall between client and server blocking access.
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Active 3 years, 2 months ago. Viewed 8k times. How do I verify what certificates openssl is trying? Does it look in subfolders? Could it be because the certs are self signed? Michael Michael 3 3 silver badges 10 10 bronze badges. Active Oldest Votes. SSL handshake has read 0 bytes and written 0 bytes This is definitely not an issue of certificate validation.
Steffen Ullrich Steffen Ullrich k 20 20 gold badges silver badges bronze badges. Thanks a bunch. I actually tried a nc -l -p after stopping the real service on of course.
I'm trying to run an openssl command to narrow down what the SSL issue might be when trying to send an outbound message from our system. I found this command in another topic: Using openssl to get the certificate from a server.
Does this mean the server isn't presenting any certificate? I tried other systems on a different ip:port and they present a certificate successfully. Eventually I found out that the reason for this behaviour was that the server required SNI servername TLS extensions to work correctly.
Supplying the -servername option to openssl made it connect successfully:. This is a handshake failure.How to write a list in pseudocode
The other side closes the connection without sending any data "read 0 bytes". It might be, that the other side does not speak SSL at all. In my case the ssl certificate was not configured for all sites only for the www version which the non-www version redirected to. I am using Laravel forge and the Nginx Boilerplate config.
So it is not enough to have the keys specified only for the www version even, if you only call the www version directly! I was getting the below as well trying to get out to github. I had a similar issue. The root cause was that the sending IP was not in the range of white-listed IPs on the receiving server. So, all requests for communication were killed by the receiving site.
The issue turned out to be simply that the user RabbitMQ was running as did not have read permissions on the certificate file. There was little-to-no useful logging in RabbitMQ.Temple breeders
Learn more. Asked 6 years ago. Active 29 days ago. Viewed k times. Does mutual authentication affect this command with -prexit? R Zeal R Zeal 1 1 gold badge 5 5 silver badges 5 5 bronze badges. Can we move this to superuser? I found the question itself helpful as it already poses a workaround.Rauhihi whakapapa
Be sure that you have used apn certificate, not ios development certificate. Active Oldest Votes. SSL handshake has read 0 bytes and written bytes This is a handshake failure. Steffen Ullrich Steffen Ullrich In the case of an older implementation, the -ssl3 option might help.Samsung tv audio problems
Thanks for the help! Alexander Taubenkorb Alexander Taubenkorb 1, 14 14 silver badges 16 16 bronze badges. What the heck Why was this happening suddenly when it worked fine in the past? Did I upgrade some software without realizing?
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