2 thoughts on “Does FRWL apply to UDP sockets and what if it is omitted?”
Hi All,
Does the FRWL accept chain apply to packets arrived on a UDP socket (created with AT#SD)?
If yes, what are the consequences of not issuing the FRWL at all?
The documentation says default setting is ‘drop’ and therefore I would expect nothing to work if I hadn’t issued FRWL but I am seeing my units working without FRWL which leads me to think it is ignored for UDP
GE865 FW 10.1.0 & 10.0.5
Thanks for help and advice,
Ciarán
Hi Ciaran,
The firewall rules (AT#FRWL) applies to all protocols on the transport layer (TCP and UDP). Outbound connections creates automatically a dynamic firewall rule for the period of that connection.
Therefore, for the connections created with AT#SD, you do not have to create a static firewall rule before, with AT#FRWL.
A static firewall rule must be created only for inbound connections (eg. for AT#SL). All above is valid for TCP and UDP.
Hi All,
Does the FRWL accept chain apply to packets arrived on a UDP socket (created with AT#SD)?
If yes, what are the consequences of not issuing the FRWL at all?
The documentation says default setting is ‘drop’ and therefore I would expect nothing to work if I hadn’t issued FRWL but I am seeing my units working without FRWL which leads me to think it is ignored for UDP
GE865 FW 10.1.0 & 10.0.5
Thanks for help and advice,
Ciarán
Hi Ciaran,
The firewall rules (AT#FRWL) applies to all protocols on the transport layer (TCP and UDP).
Outbound connections creates automatically a dynamic firewall rule for the period of that connection.
Therefore, for the connections created with AT#SD, you do not have to create a static firewall rule before, with AT#FRWL.
A static firewall rule must be created only for inbound connections (eg. for AT#SL).
All above is valid for TCP and UDP.