My problem seems to be a strange one. I have the RV120W running with port 22 forwarded to one of my servers. When attempting to upload a file from within my network via SFTP the file transfer starts and then quickly fails with the following error message. "Received disconnect from XXX.XXX.XXX.XXX: Packet corrupt. I have forwarded the port to different machines and the problem occurs no matter what machine I use. I see the same problem if I'm remote and try to download from my network. My point is that only outbound traffic is an issue. I have replaced the router with a linksys WRT and have also connected a PC directly to my cable modem and see no issues. The issue is only when I have the RV120W connected.
I have only had this router for a few weeks and the problem has occurred since I unboxed it.