Access to Web Host Denied - macos

I can't seem to access the website of my web host, as well as the websites that are hosted there when I use my desktop (Mac OS X). However it works when I access my host and my websites using my iPhone. And I can view all other websites irrespective of my desktop or smartphone.
It just happened, seemingly out of the blue. I booted my Mac and wanted to check my Emails, but there was no connection.
The alert says:
There may be a problem with the mail server or network. Verify the settings for account “Fabrizio Fracassi” or try again. The server returned the error: The connection to the server “mail.brizio.ink” on port 110 timed out.
Any suggestions would be greatly appreciated!
Many thanks for your time!
Fabrizio

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Unable to connect to GitHub for 2 years, irregardless of network - any ideas?

Toku here.
I've been without GitHub for 2 years now, and I'm getting sick of it.
In terms of web connection, I get a basic "This site can't be reached" - ERR_CONNECTION_REFUSED.
Attempting to use the desktop app results in more information
Image of 443 port error - more connection refusals.
Image of curl command result
I'm running Win10 Home build 19044, connected to a private home network with no restrictions. What would be causing this?
Tried reconfiguring DNS, and it simply didn't change anything.
At the suggestion of FiddlingAway, I resynced my system time, to no effect.
For reference, I am living in the US, so there should be no issues connecting due to a countrywide ban. The web interface does not load, even on a VPN.

Access local website from another computer in the same network

I recently wrote a web using Flask, and made the host='0.0.0.0', port=5000.
I can access the web with 127.0.0.1:5000 or localhost:5000 or 192.168.1.12:5000(my IP), but I can only do this with the computer that runs the codes.
How can I access the website from another PC in the same LAN? I have tried all the method I can find online. But none of them worked.
I'm running the code on windows 10. Please help!
Maybe Windows Defender Firewall or antivirus is blocking connection from outside. Try disabling it (or, better configure it to allow connections only to your service).
To access the website from another PC only works with your IPv4 adress.
So only 192.168.1.12:5000 would work.
But it looks like the port 5000 is blocked. Maybe it's blocked by a virus protection.
Try a port like 80 or 8080.

Can't access localhost from computer running on same network

I'm working on two computers on the same network. Computer A has an app working on localhost:4444. However, I can't access it from the browser of Computer B.
Here is my situation:
I pinged it's IP and I'm getting successful responses.
I've tried accessing through the browser: http://192.168.X.X:4444
I'm currently sharing files across both computers via the same network successfully.
Can anyone please help me make this work?
Is port 4444 on Computer A accessible from another computer?
Maybe this helps: https://technet.microsoft.com/en-us/library/ms345310(v=sql.100).aspx
(I am posting a reply since I cannot comment...)

I am not able to host my own Web site

I have a high speed cable internet connection at home. I have D-link router, and I connect 2 computers, one is a desktop running Windows XP, the other is a laptop running Windows 7. I am perfectly able to use internet on both computers.
Now I want to host my personal web site from my home computer. I have already built the site that is running on my home network. Now I want to make it accessible from internet. I did all the procedures to open the appropriate ports on my router, allow incoming connections, and port forwarding setup, using the router's guide : http://www.dlink.com/-/media/Consumer_Products/DIR/DIR%20826L/Manual/DIR_826L_MANUAL_EN_UK.pdf .
However I am still not able to see my web site from public internet.
When I try to go to my site using my local IP address (192.168.0.103) or computer name, the site is loaded on other home computer, but when I try the same using my public IP address (found with "what is my ip" on google search), I get "Page cannot be loaded" error.
Can someone please help me telling what I am doing wrong, and how the problem can be fixed?
Thanks in advance.
Are you attempting to hit your WAN IPaddress from inside your house, aka, on the lan that the WAN would hit? It could be NAT Reflection/lack thereof getting in your way. Make sure you're trying to hit your WAN IP from a network outside of your local network. If you have a phone, turn off wifi, and use your phone.
Besides that, you've listed all of the basic steps necessary. Should the above not be the problem, I would start by checking your PCs firewall. In particular on Windows 7 checking to make sure you click real hard on that "public networks" button. Then just try and ping port 80, not load the webpage. If you can't ping, it suggests configuration issues with your router/connection. If you can, there's just some configuration that's effed up with your webserver.

IIS 7 and ASP.Net MVC issue

This is a bit complex - so here we go.
I am developing a mobile web application using asp.net mvc and I need to test it locally on my iPhone. So far I have the first iteritaion of the site running on my local dev laptop. I created a virtual dir for the site under IIS 7 on the same machine. I deployed the site to that folder from VS2008. I open a browser and entered "" and the site cam up just fine. I am runnig a home network with locked down WIFI and both the laptip and my iPhone are on the network. So now I want to test with the iPhone but the site won't come up when browsing to "". I have another machine that is also on the network and I get this error message when attempting to browse to the site:
"Website (laptopname) is online but isn't responding to connection attempts"
I have a feeling that this has something to do with IIS setting and \ or application pools but have not been able to find anything relavent goolging. Any help appreciated.
There are some possibilities:
iPhone is not able to resolve your laptop by name. Try using the IP address of your computer in the URL instead.
The firewall on the laptop is blocking inbound connections from other machines. Check your firewall.
The IIS Website is configured with a host header localhost so it won't respond to requests to other hostnames. Check the binding for the Web site in the IIS Manager.
To eliminate possible network issues, you can create an ad hoc WiFi network on your PC and connect to that network to test.
Check that Allow Anonymous Access is set for the site
I suspect you are not alone, as I had this exact problem. I developed a small port opener I called "SharpProxy" that may make your local testing much easier.
Overview and instructions:
http://www.codefromjames.com/wordpress/?p=97
It's open source! Get code here: https://github.com/jocull/SharpProxy

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