So it is quite likely that you have nothing to configure your router for Skype works.
Why? Because Skype will use port 80 (HTTP port =) and 443 (= HTTPS port) . It is therefore quite possible that your router has already in-house rules for these two ports there .
1) -> You'll need to first check if Skype works without any rules in the router.
If Skype does not work, then you must establish the following rules:
2) -> Set the following rules:
-> TCP to port 80
-> TCP to port 443
WARNING: Failure to set these ports in this manner will cause the fact that they will be visible as "open" by remote computers, possibly malicious.
Finally, there is a way to potentially improve the quality of conversations on Skype:
3) -> Set the following rule: TCP & UDP port specified by Skype (in " Tools "->" Options "->" Connection ")
WARNING: Same as previously, the port will appear as open. Remember that this rule is not compulsory because it leads to a possible improvement in the quality of conversations ...