I have a remote site connected to the Internet via ADSL (CISCO SOHO 97). The Remote site connects to my SDSL Line (CISCO SOHO 800 SDSL Router) and initiates a VPN connection to my PIX 525 Firewall.
Packets / Data of any size can be ftp from the remote site to the main site's FTP server but packets / data up to 1378 bytes can only be transferred via FTP to the remote site. FTP timeout's occurs when the packets are over 1378 bytes.
ping -f -l 1378 XXX.XXX.XXX.XXX works but a packet size of 1379 does not.
Have tried to set the fragment bit's to off,copy or clear within the global router config and within the IPSEC config. No result.
Does anyone have any ideas - help !!Thank you