If I2P reseed hosts are blocked and you are unable to make the initial connection to the network, the solutions that exist right now are :
- friend to friend reseeding
- private or unlisted reseeds
- reseeds over Tor or other overlays
How to help a blocked router join the network by generating a reseed file:
https://geti2p.net/en/blog/post/2020/06/07/file-based-reseed