Help with firewall blocking Linux clients

Hello, I am having problem with a network, the firewall allows the traffic from Windows clients but blocks the traffic from Linux clients.

In order to allow the traffic of a Linux client I have modified the TTL to 128 and I have disabled the timestamp, now, the only difference is the windows size value and the windows scale, Windows uses a windows size value of 64240 with windows scale of 8 and I cannot find how to set these values on Linux.

Thanks for your help.