Subscribe to the Blog1500 = Used in Cable Broadband connection and some Wireless connections (PPPoA) 1492 = Standard ADSL value (PPPoE) 1458 = Troubleshooting value used by some ISPS 1450 = Used by some Network Providers 1400 = Lowest value recommended for a broadband connection You should contact your Internet provider to find out what MTU value they recommend for your connection. Most modern routers will allow you to set the value used in your connection: Instructions on adjusting this you should be available in the manual or from the router manufacturer