From the jslinux FAQ:
When will there be network support ?
It is relatively easy to add a virtual network interface. The problem is to make it communicate with other hosts, so at this point it is not my priority. For example, due to security restrictions, it is only possible to communicate with the web site hosting the VM or with cooperating servers. Moreover, only specific types of network protocols can be handled because no raw TCP connection nor raw UDP packets can be sent due to API restrictions and security reasons.
