Another option I've just thought about would be to check whether UPnP is enabled in the router instead of disabling the firewall switch to "
full":
upnp config
Configure the UPnP™ parameter(s).
SYNTAX:
upnp config
[maxage = <number{60-999999}>]
[writemode = <{full | natonly | readonly}>]
[safenat = <{disabled | enabled}>]
[preferredaddress = <ip-address>]
[httpport = <number{1-65535}>]
where:
maxage
A number between 60 and 999999.
This parameter allows to configure how often the SpeedTouch™ sends a notification message to advertise its presence as an Internet Gateway Device (IGD) on the network.
The default is 1800.
Note Setting this parameter to a low value will increase the number of packets sent over time on the network, but will make the state of the device more up to date.
OPTIONAL
writemode
Choose the set of rules to limit remote access from UPnP.
Choose between:
full: the host will accept all the UPnP SET and GET actions.
natonly: GET and NAT related SET actions will be accepted, all other actions will be ignored.
readonly: the UPnP control point will only be able to retrieve information, all the SET actions are ignored.
The default is natonly.
OPTIONAL
safenat
Enable or disable check on safe NAT entries.
If this check is enabled, all NAT create/delete requests for a LAN side IP address different from the source IP address of the UPnP message will be discarded.
The default is enabled.
OPTIONAL
preferredaddress
CSV list of preferred IP address for UPnP advertisements (1 per LAN IP interface).
Note Enter “0.0.0.0” for none.
OPTIONAL
httpport
A number between 1 and 65535.
Represents the web server port.
The default is 80.
