I have got the same problem and the same log and I am running out of ideas, what is behind it. I only know it has nothing to do with the firewall (I shut it down and problem persisted). It is strange because it worked for a while last week (before I start playing around wit thttpd-php - sadlt it is not workig either). The only diference from Tim`s case seems to be that both the web server and ftp are reachable from the lan side, I cannot connect from the wan side though (smart ftp says this:
Resolving host name 10.102.236.214...
Connecting to (10.102.236.214) -> IP: 10.102.236.214 PORT: 21
Connected to (10.102.236.214) -> Time = 10ms
Socket connected waiting for login sequence.
Cannot login waiting to retry (30s).