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Port triggering is a network management strategy characterised by dynamic facilitation, opening, and forwarding of specific inbound ports based on discerned patterns in outbound traffic. This adaptive approach optimises network efficiency by selectively permitting inbound data in response to recognised internal network activities.
https://code.rdkcentral.com/r/q/topic:Port_triggering_patches
RPI4 32bit |
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Reference link: RPI 4B Model Reference Platform
Reference link: RPI 4B Model Reference Platform with 64bit Arch
RPI4 64bit |
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mkdir <workspace dir > cd <workspace dir > repo init -u https: //code .rdkcentral.com /r/manifests -b kirkstone -m rdkb-extsrc.xml repo sync -j`nproc` --no-clone-bundle MACHINE=raspberrypi4-rdk-broadband source meta-cmf-raspberrypi /setup-environment //For 32 Bit Image MACHINE=raspberrypi4-64-rdk-broadband source meta-cmf-raspberrypi /setup-environment //For 64 Bit Image bitbake rdk-generic-broadband-image |
Reference link: RPI 4B Model Reference Platform 32bit
Reference link: RPI 4B Reference Platform 64bit
TCP - Method used FTP server |
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1)In Your client machine(LAN)you have to run FTP server 2)In router configure Trigger port 443:443 and Target port 21:21 3)External network(WAN) try to access ftp server of client machine using router uplink ip address(Goto terminal enter ftp -p 192.168.2.30) ftp port 21 will not start util you trigger any packet flow on port 443 in your client machine 4)In your client machine(LAN)run https service(In browser https://www.google.com) 5)Goto to your external network(WAN),try access ftp server of client machine(ftp -p 192.168.2.30).incoming traffic on ports 21 after seeing an outgoing packet on port 443 |
UDP - The Netcat ( |
1)In router configure Trigger port 443:443 and Target port 2399:2399 |
By default Port triggering will be disabled in the RPI .We can enable using two methods .One is through DM and other way is through UI
DM :
dmcli eRT addtable Device.NAT.X_CISCO_COM_PortTriggers.Trigger.
dmcli eRT setv Device.NAT.X_CISCO_COM_PortTriggers.Trigger.1.Description string Myservice343
dmcli eRT setv Device.NAT.X_CISCO_COM_PortTriggers.Trigger.1.TriggerProtocol string TCP
dmcli eRT setv Device.NAT.X_CISCO_COM_PortTriggers.Trigger.1.TriggerPortStart uint 8080
dmcli eRT setv Device.NAT.X_CISCO_COM_PortTriggers.Trigger.1.TriggerPortEnd uint 8090
dmcli eRT setv Device.NAT.X_CISCO_COM_PortTriggers.Trigger.1.ForwardPortStart uint 3000
dmcli eRT setv Device.NAT.X_CISCO_COM_PortTriggers.Trigger.1.ForwardPortEnd uint 4000
WEBUI
Step 1: Login to webui, from navigation -> Advanced ->Port Triggering. Click on Add Port Trigger.
Testing Steps (TCP and UDP)
TCP :
Router configure Trigger port 443:443 and Target port 21:21.
From External network(WAN) try to access ftp server of client machine(LAN client) using router uplink ip address(Goto terminal enter ftp -p 192.168.2.30 in WAN client),
while client machine(LAN)run https service(In browser https://www.google.com)
UDP :
Router configure Trigger port 443:443 and Target port 2399:2399.
In Your client machine(LAN)you have to run : nc -u -l 2399
From external WAN machine run nc -u 192.168.2.30 2399, while client machine(LAN)run https service(In browser https://www.google.com)
RaspberryPi
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