As you have probably noticed, is it not easy anymore with a standard firewall to block these kinds of applications. A few years a new trend has been launched so that most appliacations will pass port 80 (http) or 443 (https) . A good example for this is skype. In 2010 you could block the Skype service by blocking a port on your firewall. Now these days skype works on port 443 (Https). So with a regular firewall you can't see iif the HTTPS legimate or not.
You have newer firewalls ( brands like Palo Alto, Juniper Networks, Barracuda Networks, ...) who have build a new kind of firewall (they call it the next generation firewall). It gives you the possibilty to define traffic and create policies for these kind of traffic depending on your LDAP structure.
Conclusion:
Not if your firewall is configured correctly. Routers and software firewalls block any unauthorized attempts to get at this sort of information.
New routers have advanced firewall features capable of blocking most security threats.
If you want to protect your computer, yes you need a firewall. Firewall which comes with routers will not protect you from more sophisticated internet attacks.
If you are looking to active your firewall on a router, go into your router administration panel. Find the routers firewall tab and make sure it is enabled.
Routers usually, if not always, include a firewall. This is the only device I know of.
firewall
Screened Host
All routers provide good hardware firewalls using stateful packet inspection (SPI), but Buffalo routers are excellent in this regard.
Many routers come with hardware support built in to protect your connection from those attempting to hack or disrupt your service. Many netgear routers come with firewall support built in, as do buffalo and D link router equipment.
No
No
Implement firewall hardware as well as firewall software on your computer/computer network and implement the use of Access Control Lists (ACLs) on your network's routers.