Company intranet cannot access an Internet site

After investigation:

1. Troubleshoot server-side issues

Using the tcping test found that the Web site corresponding to the TCP port open, and through other network access, prove that the server-side basically no problem

2. Troubleshooting MTU Issues

PING-F-l Specifies non-sharding, message size, test optimal MTU value of 1464

C:\users\administrator>ping-f-L 1465 www.baidu.com

Ping www.a.shifen.com [115.239.210.27] has 1465 bytes of data:

Reply from 101.86.123.76: The packet needs to be split but DF is set.

The packet needs to be split but DF is set.

The packet needs to be split but DF is set.

The packet needs to be split but DF is set.

Ping Statistics for 115.239.210.27:

Packet: Sent = 4, received = 1, lost = 3 (75% missing),

C:\users\administrator>ping-f-L 1464 www.baidu.com

Ping www.a.shifen.com [115.239.210.27] has 1464 bytes of data:

Reply from 115.239.210.27: Byte =1464 time =8ms ttl=51

Reply from 115.239.210.27: Byte =1464 time =10ms ttl=51

Reply from 115.239.210.27: Byte =1464 time =10ms ttl=51

Reply from 115.239.210.27: Byte =1464 time =9ms ttl=51

Ping Statistics for 115.239.210.27:

Packet: Sent = 4, received = 4, lost = 0 (0% missing),

Estimated time to round trip (in milliseconds):

Shortest = 8ms, longest = 10ms, average = 9ms

C:\users\administrator>

3, modify the Egress router interface MTU

Modify Egress Router interface MTU less than equals 1464 problem resolution

Company intranet cannot access an Internet site