Meh, I don't see the port 6000 opened in your list...
Is your error on the server side or client side? If it's the client
side: can you show me a screenshot? (You can upload on https://urldefense.proofpoint.com/v2/url?u=https-3A__snag.gy&d=DwICAg&c=aqMfXOEvEJQh2iQMCb7Wy8l0sPnURkcqADc2guUW8IM&r=X0jL9y0sL4r4iU_qVtR3lLNo4tOL1ry_m7-psV3GejY&m=gUp9gElVn2Qw3BM2bDqjgtsXQArlBOeLNk87KCCKsSgEJAcmpENe8B8pNL75m_Kj&s=xXffNMxVycEbxjVFghBzQhwNR2CPhj4cVNLkKB55syQ&e=
).
Did you compile X2GO? How did you install it?..
Regards,
Chris N.