amigo_boy
join:2005-07-22
Tempe, AZ
 ·Cox HSI
 ·magicjack.com
3 edits | reply to TxJohn
Re: MJ incompatible with Verizon Security Suite
If you actually know how to use the Verizon Firewall then unblock these ports:
TCP Ports List: 80 (HTTP), 443 (HTTPS)
UDP Ports List: 5060, 5070
UDP 10000-65535 (I am not sure if these are necessary but people claim Magicjack will use a random port in this range.) That's not entirely correct.
1. MJ only uses UDP 5070. But, it's common for people to open 5060 through 5070 because that's what the SIP standard provides for.
2. MJ uses a random UDP port in the range of 10000-30000. There's no reason to open ports above 30000.
3. This port "opening" should not be confused with "port forwarding."
Most people who think of "opening ports on their firewalls" think it means they have to allow access *from* the extranet into their local network (using "port forwarding"). Magicjack doesn't require that.
The people who get into trouble with firewalls are those in corporate (restrictive environments), or who use a simplified security or firewall interface, and choose "high" without knowing what it means. In both cases it restricts access *to* the external network from the internal network (except for some well known activities like web browsing on ports 80, 8080, 443.
It's *those* people who need to open ports to undo the restrictions they placed on themselves.
Caveat: There are a few rare circumstances involving Linksys routers with buggy firmware, where port forwarding (allowing external connections *into* the internal network) seems to allow the buggy router to work.
The only reason I'm sensitive to this topic is that I see the advice "open ports" given out so often that it causes MJ users to use port forwarding to open large (incoming) holes in their firewalls for no reason. It turns into an urban legend just because everyone's seen so many people provide the advice (without explanation).
The vast majority of people do not have restrictive firewalls prohibiting *outbound* access to the internet. That's the only time (except for some buggy newer Linksys routers) that anyone needs to "open ports."
Mark |
