You need to verify that all IP addresses provided by your hosting provider are usable. This can be easily verified by using ping IP address. A typical successful response looks like the following partial listing with the percentage of data transmission packets sent and received. To break out the screen output result of the command ping, type Control C (press down Ctrl and then C at the same time) from the keyboard. If there is no packet loss (0%), your IP address is available for connection.

[brucelee @ ~]$ ping
PING ( 56(84) bytes of data.
64 bytes from icmp_seq=0 ttl=64 time=3.33 ms
64 bytes from icmp_seq=1 ttl=64 time=1.63 ms

--- ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3013ms rtt min/avg/max/mdev = 1.557/2.039/3.333/0.749 ms, pipe 2

You should be aware that even though the Linux commands are issued within a SSH session on your Windows desktop, they are actually executed on your dedicated server. The latency of response (measured in ms) should give you a good idea how fast the network connectivity speed of your hosting provider to the Internet backbone is.