I have recently switched from mac development environment to windows development environment. I was used Chrles proxy extensively to capture network traffic, requests and response details. Right now I have installed Charles proxy version 3.7 in windows 8. How ever I have observed that the website on which I am working is not opening at all with Charles proxy ON. It is showing below exception message. And it is working perfectly for all other websites.
Charles Error Report
Failed to connect to remote host
Charles failed to connect to the remote host. Check that your Internet
connection is ok and that the remote host is accessible. Maybe your
network uses a proxy server to access the Internet? You can configure
Charles to use an external proxy server in the External Proxy
Settings.
The actual exception reported was:
java.net.ConnectException: Connection timed out: connect Charles
Proxy, http://www.charlesproxy.com/
Research that I have done before coming to SE:
I have searched in google with the keyword "Charles Error Report-Failed to connect to remote host". I got couple of links which are related to the above issue.
First link says to check for external proxy setting. I have checked, there are no external proxy settings in my computer.
Second link says open the url in browser and close charles proxy and reopen it. I did that. Still no luck.
How to overcome this issue?
Do you get the same problem with other proxies like Fiddler? If so, it's probably not related to Charles but either a network problem or inability of your application to work with a proxy.
Other causes may be using HTTPS (which can cause certificate errors) or using the loopback address (localhost or 127.0.0.1) which may or may not be ignored by the proxy.
UPDATE
In IE10+ Enhanced Protection Mode prevents untrusted applications from accessing local resources. Pages and sites that are not in the Trusted Zone are considered unstrusted, so they can't connect to any local proxy. Fiddler includes a configuration button to configure Windows 8 to bypass this. You can find a very good explanation of what happens and why here.
In Windows 8, EPM is enabled only for Metro IE. In 8.1 it is enabled by default even for Desktop IE.
You may be able to make Charles work again simply by adding your site's address to the Trusted Zone in IE's security settings, or you can download the EnableLoopBackUtility mentioned in Configure Fiddler for Windows 8 Metro-style applications to allow IE to connect to your site through the local proxy
I have experienced this as a timing or caching related gremlin. For me, in most cases, this is resolved by doing force-reload a few times in the browser. Doing so is slightly different on each platform. In Mac/Chrome, holding down Command + Shift + R for a couple of seconds does the trick. In Win/IE, holding Shift and clicking the reload icon in the address bar a couple of times does it - in theory, Shift + F5 should do the same thing, but it does not work as well.
Related
When accessing https://mcgillcrm.com some users are seeing this in chrome: ERR_SSL_PROTOCOL and this is firefox: SSL_ERROR_RX_RECORD_TOO_LONG
But it only happens when they access the site through a specific ISP (Videotron).
When the site is accessed via a hotspot or when connected to a different ISP it works fine and it also works if the user is using Windows machine instead of a Mac.
I verified SSL labs, checked port 443 and compared against another site where it doesn't throw this error and everything seems fine.
We have a 301 redirect towards https and I double checked that users really type https:// when accessing the web-site, but it still doesn't work.
How is the connection done to the ISP vs. how is the connection done to a different ISP or mobile network
Mac user connects to the wireless modem: SSL errors come up
Mac user connects to the wireless mobile hotspot: No error comes up
Update 12 Oct 2022
We re-installed a new certificate from scratch and this one is not showing 'self signed' anywhere. Will see if it helps.
HTTPS is end to end encryption and integrity protection. It should not depend on the ISP used by the client. If it is specific only to the ISP or specific clients then something is messed up at their end, like some middleboxes or antivirus interfering with the connection, a captive portal asking the client to acknowledge some rules first, DNS resolution pointing to a different IP then yours etc. There is nothing you can do from the server end against this, since maybe the server is not even reached by the client.
Problem turned out to be with safebrowse.io which was somehow caching the incorrect certificate (clearing SSL cert in chrome didn't help).
It in turn affected other browsers also like Firefox. So once the incorrect cert was cached it flagged it globally as an unsafe site..
It looks like it was cached inside the logged in users chrome profile (Google Workspace account).
Solution was to login as Guest > Go to web-site > Click 'Proceed anyway' > Restart Chrome
This looks like a serious design flaw with safebrowse.io, why/how it caches SSL certificates in Chrome profile is unclear. This should have worked while accessing the web-site in Chrome incognito but it didn't..
This server worked not too long ago (I don't have a specific date). We use it for testing and had successfully deployed a few applications. Upon returning to the project I could no longer access the applications chrome saying the site cannot be reached when I netstat -an | grep 'LISTEN'.
I can see the unsecured port but the SSL port is missing in action. I asked the networking team if the ports were being blocked and they said no. I tried to force the application to use the secure port by disabling the unsecured port, restarting the managed server but the it fails to start with this configuration.
Any thoughts? SSL is not really my area of expertise (this is my first exposure). When googling the title I didn't see any results that matched the problem I am having, or at least I did not realize they did...
The server will restart if I enable the unsecured port.
# Gerardo Arroyo, yes this seems to be the issue. I assumed that this server used the same certs as other servers in the test system but it seems I was wrong. I will request a new cert from the networking team. Thank you
I am not able to capture any information when starting spy-js on Intellij IDEA 15. I think I'm being defeated by proxies. My setup is as follows:
system:
OS X version 10.10.5
network:
I work behind a corporate firewall with proxy servers. These proxies are set at the system level and also at the bash shell level. HTTP_PROXY, http_proxy, http.proxy etc are all set.
web server: My web server runs on a remote system within the corporate network over port 80
gulp:
I run gulp serve-debug to start my local development web proxy. I use browsersync. So I have my website at localhost:3000, and this maps to some-corp-location/ui
spy-js config:
At the moment, it looks like this (though I've thrashed about and tried many things)
I followed the advice I've found to check chrome://net-internals/#proxy and it never shows the spy-js proxy settings, it always only shows the corporate proxy settings. This is why I'm pretty sure I'm getting burned by proxies. I tried looking at the chrome proxy settings to see if I could disassociate it with the system settings, but it wasn't clear if this would work out or not.
I have a Windows 2003 server, with IIS6 + .Net 4 installed.
I created a site running on port 8002. It could be accessed locally but not remotely. I have done following tests
I used server's local broswer to access http://192.168.1.107:8002/WebForm2.aspx and I can get page successfully.
I opened a broswer on remote machine to access http://192.168.1.107:8002/WebForm2.aspx, browser waited for long time and eventually displayed timeout, web page not available message.
I tried telnet 192.168.1.107 8002 from client machine, and the connection could be established. I believe I have Windows 2003 server firewall turned off, otherwise the port should be blocked.
I ran ping 192.168.1.107 from client machine and got response.
While remote browser is waiting for response, I shut down the site (not IIS) and brwoser got not available right away. It looks like broswer connected to the site, but just something is hanging there.
What could cause such problem?
what are your dns settings? is the ip bound to this domain / host header?
recheck your settings in iis and check your firewall.
It sounds like you were able to reach the server, but I can only guess that based on what you're saying you tried already.
i would also make sure that nothing else is using that ip.
OK, strange thing. I created the site in VS2012 and forgot to change target framework back to 4.0, so it was compiled as 4.5. But server has no 4.5 installed.
Once I changed the target framework everything works.
I just don't understand one thing, hwy it worked locally in 4.5.
I'm using windows server 2008 & IIS 7.0 to deploy the my vb.net 3.5 application.
I'm successfully able to run the URL on my server.
Same URL having IP address & port number configured is not working on client system.
It is showing IE default error message as "page cannot display"
Thanks
A couple of things to do:
Try it in something other than IE - Or at the very least turn off IE "Friendly http error messages" as they obscure the real problem (Tools -> Internet Options -> Advanced)
Make sure the IIS website is bound to all IP Addresses not just 127.0.0.1 (localhost)
Make sure the windows firewall / other firewalls in use are configured to allow incoming traffic on port 80 through (assuming you're using port 80)
Check the event logs - If it's a coding problem, the error message is usually dumped in there
If the client system is on a different network, make sure that all your firewalls/routers are set up to allow the appropriate traffic through
Some more information which would help us:
Where (in network terms) is the client you mention? same network?
What happen if you use the full URL the client's using from a browser on the server?
When you say it works on your server, is that the VS development server? or the same server the client is using?