Sader,
your ip address, subnet mask and broadcast address don't fit together.
Quote:
Originally Posted by Sader
IP: 88.151.181.37
subnet mask: 255.255.255.248
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That means you are in the subnet 88.151.181.32/29. IP addresses available in this subnet are 88.151.181.33-88.151.181.38. The broadcast address is 88.151.181.39 and *not* 88.151.181.255.
The address you specified as the default gateway 88.151.181.31 is not part of your subnet at all and thus not reachable. (See dablew's post)