Cannot access specific website (MBP - OS X 10.10.5) I’m having problems connecting to a certain website. It’s random whether the site loads but recently it’s been getting worse. What happens is that I turn my router and computer off at night, then after rebooting in the morning more often than not the site in question will not load. This happens even though I could access it the day before without any difficulty. A reboot of the router is what triggers the glitch. All other web sites load as they should. 

The site itself is ok since I can access it via a proxy server and DownForEveryoneOrJustMe.com verifies it’s online. I suspect it has to do with my computer since I can access the site using an Android tablet via wifi (same router &amp; modem). 

Things I’ve tried on my computer:


tried 3 different browsers (Firefox, Safari, Opera);
cleared the browsers' caches and disabled firefox addons
ran Onyx in automation mode, rebooted. 
deleted SystemConfiguration in /Library/Preferences/SystemConfiguration then rebooted.
tried booting into 2 different HD disks.
flushed the DNS cache (from Admin account)
added/removed DNS addresses on Google &amp; OpenDNS. Currently use my ISP’s DNS addresses.
disabled OS X firewall briefly. Disabled &amp; reinstalled GUI app for OS X firewall.
disabled LittleSnitch, rebooted.
checked /etc/hosts (localhost entries only)
changed MTU to 1453 in Preferences > Network > Advanced > Hardware (Manual, 1453)
called my ISP. They told me it was a problem with my computer.
A ping test results in 100% packet loss and Request Timeout.


Router &amp; modem


reset router and modem to factory settings and rebooted.
tried 2 different routers; one wifi, one wired, same maker.
bypassed the router so that the modem was connected directly to my computer. Problem persisted after modem/computer reboot.


I have no anti-virus software installed but I recently upgraded to a new modem. Am using a Macbook Pro on OS X10.10.5. I’d appreciate any suggestions as I’m out of ideas. Thanks.
1 - Run Disk Utility from the Utilities folder and "Repair Permissions."  Let it run.  It will take a while.  When it is done, quit the program.

2 - Reinstall an anti-virus program and run a scan.

3 - Open Safari and from the "Safari" menu, click on reset Safari.

4 - Go to System Preferences, click on "Security and Privacy."  Make sure your firewall is set to "ON."