It has happened with a number of SCCM Implementors that when they try to sysnc updates in SCCM they get error in wsyncmgr and wcm.log files . If you happen to find this error:

The solution lies in the error itself . First you have to make sure that for SCCM 2012 Sp1 you must have WSUS 3.0 SP2 installed with patches KB2720211 + KB2734608) . Once this is done you may sync and the sync will work fine . Also make sure that in the SUp configuration the http port should be port 80 .