Hi Subhajit,
I have a question regarding the strongSwan configuration. Could you please share the ipsec.conf or swanctl.conf that you used when testing with real phones? I’d like to see what authentication method was used in your test case. Based on my understanding, it could be either PSK (Pre-Shared Key) or certificate-based.
Additionally, since mobile devices typically send a CERTREQ by default, I’m curious how you managed to validate it at the ePDG end. Also, could you explain how tunnel authentication was handled/configured in your setup? Any further details would be appreciated.
no it's based on EAP-AKA or EAP-AKA' which allows mutual authentication. Yes, the certificate would also improve the situation, but it's optional.
You can find a description of my setup here: https://projects.osmocom.org/projects/osmo-epdg/wiki/Hosted_epdg_playground Further to read: https://projects.osmocom.org/projects/osmo-epdg/wiki/EPDG_implementation_pla...
I used the following setup for testing:
https://gitea.osmocom.org/ims-volte-vowifi/ansible-prototype/src/branch/mast...
Best, lynxis