I just received D-Link DSL 6850u router.
I have sites that I always connected to via Filezilla FTP - using unencrypted FTP and Passive mode. Since I changed to D-Link router these connections have stopped working. SFTP works and I think active mode works. I have tried on multiple FTP clients(WinSCP,CoreFTP) and all have same problem. FTP makes the connection, enters passive mode, and gets stuck after sending MLSD command - Timeout. No information is coming from server. I have tried same sites from other routers and they WORK.
Finally, after spending hours on this, I discovered under Setup -> WAN SETTINGS -- PPPOE WAN (Where my ISP username and password is entered), there is checkbox for firewall. IF I DISABLE FIREWALL, EVERYTHING WORKS.
1) Is this safe - or will I now open up all ports to hackers?
2) Which rules do I need to add to allow me to connect to sites via FTP?
Thanks