[GH-ISSUE #129] Where did I go wrong?

kerem commented

2026-03-01 17:40:09 +03:00

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Originally created by @SkunkWerks7 on GitHub (Apr 29, 2016).
Original GitHub issue: https://github.com/aluxnimm/outlookcaldavsynchronizer/issues/129

I've tried various routes to entering the DAV Url, various means of authenticating. every time it's the same result. No response from server...

...

Alright, after "simplifying" the Url a bit, I've managed to get it down to a SSL/TLS issue. Says it's an invalid cert- but I already know the issue there.

Possibly also meaningful:

CalDavSynchronizer.DataAccess.WebDavClientException: An error occurred while sending the request. ---> System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond [IP REDACTED]
at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
--- End of inner exception stack trace ---
at System.Net.HttpWebRequest.EndGetRequestStream(IAsyncResult asyncResult, TransportContext& context)
at System.Net.Http.HttpClientHandler.GetRequestStreamCallback(IAsyncResult ar)
--- End of inner exception stack trace ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.d__7.MoveNext()
--- End of inner exception stack trace ---
at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at CalDavSynchronizer.DataAccess.CardDavDataAccess.d__13.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at CalDavSynchronizer.Implementation.Contacts.CardDavRepository.d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
at GenSync.Synchronization.Synchronizer`7.d__17.MoveNext()

How do I get this to accept a self-signed cert?

Originally created by @SkunkWerks7 on GitHub (Apr 29, 2016). Original GitHub issue: https://github.com/aluxnimm/outlookcaldavsynchronizer/issues/129 I've tried various routes to entering the DAV Url, various means of authenticating. every time it's the same result. No response from server... ... Alright, after "simplifying" the Url a bit, I've managed to get it down to a SSL/TLS issue. Says it's an invalid cert- but I already know the issue there. ![screenshot 1061](https://cloud.githubusercontent.com/assets/18739816/14923657/67a4f84e-0e0c-11e6-9d20-93af648df763.jpg) Possibly also meaningful: _CalDavSynchronizer.DataAccess.WebDavClientException: An error occurred while sending the request. ---> System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond [IP REDACTED] at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult) at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception) --- End of inner exception stack trace --- at System.Net.HttpWebRequest.EndGetRequestStream(IAsyncResult asyncResult, TransportContext& context) at System.Net.Http.HttpClientHandler.GetRequestStreamCallback(IAsyncResult ar) --- End of inner exception stack trace --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.<ExecuteWebDavRequest>d__9.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.<ExecuteWebDavRequestAndReadResponse>d__7.MoveNext() --- End of inner exception stack trace --- at CalDavSynchronizer.DataAccess.HttpClientBasedClient.WebDavClient.<ExecuteWebDavRequestAndReadResponse>d__7.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at CalDavSynchronizer.DataAccess.CardDavDataAccess.<GetAllVersions>d__13.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at CalDavSynchronizer.Implementation.Contacts.CardDavRepository.<GetAllVersions>d__5.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task) at GenSync.Synchronization.Synchronizer`7.<SynchronizeNoThrow>d__17.MoveNext()_ How do I get this to accept a self-signed cert?

kerem closed this issue

2026-03-01 17:40:09 +03:00

kerem commented

2026-03-01 17:40:10 +03:00

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@nertsch commented on GitHub (Apr 29, 2016):

"How do I get this to accept a self-signed cert?"
Please read the readme.md:
"If you have problems with SSL/TLS and self-signed certificates, you can change the following settings at your own risk. The recommended way would be to add the self signed cert to the Local Computer Trusted Root Certification Authorities You can import the cert by running the MMC as Administrator.

- Disable Certificate Validation set to true to disable SSL/TLS certificate validation, major security risk, use with caution!
- Enable Tls12 set to false to disable TLS12, not recommended
- Enable Ssl3 set to true to enable deprecated SSLv3, major security risk, use with caution!

"

br
Gerhard

@nertsch commented on GitHub (Apr 29, 2016): "How do I get this to accept a self-signed cert?" Please read the readme.md: "If you have problems with SSL/TLS and self-signed certificates, you can change the following settings at your own risk. The recommended way would be to add the self signed cert to the Local Computer Trusted Root Certification Authorities You can import the cert by running the MMC as Administrator. ``` - Disable Certificate Validation set to true to disable SSL/TLS certificate validation, major security risk, use with caution! - Enable Tls12 set to false to disable TLS12, not recommended - Enable Ssl3 set to true to enable deprecated SSLv3, major security risk, use with caution! ``` " br Gerhard

kerem commented

2026-03-01 17:40:10 +03:00

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@SkunkWerks7 commented on GitHub (Apr 29, 2016):

Yep. Read that. But here's the thing- I've already trusted self-signed certs from this server for mail (incoming and outgoing). If there's a different one in play for this purpose, I'm not being given an opportunity to download it much less add it to trusted.

It just keels and errors-out unhelpfully.

@SkunkWerks7 commented on GitHub (Apr 29, 2016): Yep. Read that. But here's the thing- I've already trusted self-signed certs from this server for mail (incoming and outgoing). If there's a different one in play for this purpose, I'm not being given an opportunity to download it much less add it to trusted. It just keels and errors-out unhelpfully.

kerem commented

2026-03-01 17:40:10 +03:00

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@aluxnimm commented on GitHub (Apr 29, 2016):

when you trust a cert in a browser or outlook it doesn't automatically mean it is trusted from the .Net framework. Therefore tge self signed cert must be downloaded manually in a browser and imported in the local computer store.

@aluxnimm commented on GitHub (Apr 29, 2016): when you trust a cert in a browser or outlook it doesn't automatically mean it is trusted from the .Net framework. Therefore tge self signed cert must be downloaded manually in a browser and imported in the local computer store.

kerem commented

2026-03-01 17:40:10 +03:00

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@SkunkWerks7 commented on GitHub (Apr 29, 2016):

I'm new at this Cert thing- the vagaries, the totally-necessary neurosis... you'll have to pardon me while I ululate a well-deserved groan

Having got that out of my system, I don't have a way to manually download this that I am aware of.

Any ideas?

@SkunkWerks7 commented on GitHub (Apr 29, 2016): I'm new at this Cert thing- the vagaries, the totally-necessary neurosis... you'll have to pardon me while I ululate a well-deserved __groan__ Having got that out of my system, I don't have a way to manually download this that I am aware of. Any ideas?

kerem commented

2026-03-01 17:40:10 +03:00

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@aluxnimm commented on GitHub (Apr 29, 2016):

so why don't you just use the general option Disable Certificate Validation if you have trouble with the certificate handling.

@aluxnimm commented on GitHub (Apr 29, 2016): so why don't you just use the general option Disable Certificate Validation if you have trouble with the certificate handling.

kerem commented

2026-03-01 17:40:10 +03:00

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@SkunkWerks7 commented on GitHub (Apr 29, 2016):

Partly because there are dire warnings sat around that option suggesting that nothing short of forty days and forty nights of flooding will occur should I check the box, partly because that would make me a bad person who should feel bad, and partly because I'd prefer to take advantage of what protections I can.

@SkunkWerks7 commented on GitHub (Apr 29, 2016): Partly because there are dire warnings sat around that option suggesting that nothing short of forty days and forty nights of flooding will occur should I check the box, partly because that would make me a bad person who should feel bad, and partly because I'd prefer to take advantage of what protections I can.

kerem commented

2026-03-01 17:40:10 +03:00

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@aluxnimm commented on GitHub (Apr 29, 2016):

then check msdn for help e.g.
https://msdn.microsoft.com/en-us/library/ms788967.aspx

closing since no bug but a windows support question.

@aluxnimm commented on GitHub (Apr 29, 2016): then check msdn for help e.g. https://msdn.microsoft.com/en-us/library/ms788967.aspx closing since no bug but a windows support question.

kerem commented

2026-03-01 17:40:10 +03:00

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@SkunkWerks7 commented on GitHub (Apr 30, 2016):

Well, considering most products that deal with certs seem to better automate the process of bringing in even a self-signed cert I'd have thought this was a question more relevant to your software, but hey, why not, pass the buck.

Cheerio

@SkunkWerks7 commented on GitHub (Apr 30, 2016): Well, considering most products that deal with certs seem to better automate the process of bringing in even a self-signed cert I'd have thought this was a question more relevant to your software, but hey, why not, pass the buck. Cheerio

kerem commented

2026-03-01 17:40:10 +03:00

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@evert commented on GitHub (Apr 30, 2016):

I'd definitely say that there's nothing wrong with using self-signed certificates, but disabling verification absolutely is the wrong advice, in almost every situation.

@evert commented on GitHub (Apr 30, 2016): I'd definitely say that there's nothing wrong with using self-signed certificates, but disabling verification _absolutely_ is the wrong advice, in almost every situation.

kerem commented

2026-03-01 17:40:10 +03:00

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@aluxnimm commented on GitHub (Apr 30, 2016):

wasn't our first advice. we mentioned the risks and provided links and info how to import the cert first.

@aluxnimm commented on GitHub (Apr 30, 2016): wasn't our first advice. we mentioned the risks and provided links and info how to import the cert first.

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[GH-ISSUE #129] Where did I go wrong? #593