@Pippin said in suddendly I get a "bad source address from client" on OpenVPN, yet everything is working:
From info given you don't really need the iroute.
exactly, and it's plain wrong as well, in fact it wasn't set up with the unnecessary iroute and I had no such message in the logs, afaik nothing major changed on my side of things.
I am connecting from a home connection which is actually a 4G router, no adsl reaches where I live, and the carrier did change something because their NAT address definitely changed before this happened, but I can't fathom how that would cause that message on my logs.
luckily this is just a VPN connection I use to admin the firewall from my laptop from remote locations and from home if needed, so nothing critical, the critical VPNs this box handles are untouched by this issue and the logs are clean.
I should have avoided common subnets from the beginning, guess it's time to do that now and see if that has any impact, it's good practice anyways.