I'm using shibby tomato build, now i have a problem with FTP. It's very slow (about 10-20KB/s) when downloading from NAS via FTP, the load is low (<0.1). But if i use samba, it acts quite well (2MB/s). Some iOS apps only support FTP but not samba. So can any guys help to debug what happened and how to improve the poor speed of FTP?