I struggled to get this so quick.
No need to get mad. I got this log remotely from school, it's not the same Forge version but my point still apply.
I'm deeply sorry if this is something that only works for *latest* version of forge, but I find this would not matter which version.
The part of the log I'm interested in is:
The server found FML:s certificate (mod signature data), but didn't find those for mcp, Forge and some other irrelevant mods as seen in the complete log file under here.
The log is to big to copy to pastebin. So I uploaded it on dropbox.
https://www.dropbox.com/s/1igcpfe2oez5a90/fml-server-latest.log?dl=0