Free5GC as GTP-C and GTP-U proxy

General Discussions
#1

Hello,

I am trying to setup Ruckus vSZ Wi-Fi controller as S2a or S5/S8 to 3GPP Rel.14+ 4G/5G packet core PGW.

1.vSZ send Create Session Request with x.x.x.1 IP as GTP-C + y.y.y.1 GTP-U to PGW
2.PGW Create Session Response with x.x.x.2 IP as GTP-C + z.z.z.1 GTP-U to vSZ
3.vSZ ignores z.z.z.1 GTP-U IP and trying session from y.y.y.1 to x.x.x.2 as GTP-U IP
4.There is not any configuration or option to fix it on vSZ…

Is it possible configure use Free5GC as GTP-C and GTP-U proxy between vSZ and PGW?

Regards,

#2

Hi,

From an architectural perspective, free5GC is designed as a complete 5G core network and is not well-suited to function as a GTP proxy. While it is technically possible to modify the SMF and UPF components to implement GTP-C and GTP-U forwarding behavior, this would require significant changes to the system.

If your goal is simply to relay GTP-C/U messages, it would be more reasonable to use a dedicated GTP proxy tool instead of modifying free5GC.

Best Regards,
Peggy

#3

Is there any open source GTP proxy tool suggestion?

I tried Google, nothing found…

#4

Hi,

I’m not certain whether there’s an existing GTP proxy tool that fits your needs.
It might be possible to configure or modify gtp5g to act as a proxy.

Best regards,
Peggy

#5

Yes, trying gtp5g and Linux iptables for proxy.