streaming video over lan ok,over http black

[timbu]

hi
idont know whats wrong,i stream[http] a ts file over the lan all works fin,but if i try to stream over the internet,on the client i get only a black screen,no sound,nothing,only black.
what can be the problem?

greetings
timbu

[Rémi Denis-Courmont]

Firewall or insufficient bandwidth.