Note that obfsproxy seems to crash in managed mode, so run it stand-alone. Configure tor as a regular bridge (https://www.torproject.org/docs/bridges.html.en#RunningABrid...), and then start obfsproxy with ./obfsproxy obfs2 --dest=127.0.0.1:9001 server 0.0.0.0:1051.
9001 is the bridge port configured in tor and 1051 is the port which will accepted obfuscated connections. I think that a random port is chosen in managed mode, so you might want to change it.
Note that obfsproxy seems to crash in managed mode, so run it stand-alone. Configure tor as a regular bridge (https://www.torproject.org/docs/bridges.html.en#RunningABrid...), and then start obfsproxy with ./obfsproxy obfs2 --dest=127.0.0.1:9001 server 0.0.0.0:1051.
9001 is the bridge port configured in tor and 1051 is the port which will accepted obfuscated connections. I think that a random port is chosen in managed mode, so you might want to change it.