D-Link AC750 User Manual page 195

Section 6 - Troubleshooting
3. Why can't I connect to certain sites or send and receive e-mails when connecting through my router?
If you are having a problem sending or receiving e-mail, or connecting to secure sites such as eBay, banking sites, and Hotmail,
we suggest lowering the MTU in increments of ten (Ex. 1492, 1482, 1472, etc).
To find the proper MTU Size, you'll have to do a special ping of the destination you're trying to go to. A destination could be
another computer, or a URL.
• Click on Start and then click Run.
• Windows® NT, 2000, XP, Vista®, and 7 users type in cmd (Windows® 95, 98, and Me users type in command) and
click OK (or press Enter).
• Once the window opens, you'll need to do a special ping. Use the following syntax:
ping [url] [-f] [-l] [MTU value]
Example: ping yahoo.com -f -l 1472
D-Link DIR-818LW User Manual 190