I am running a Redhat 6.0, currently kernel 2.2.5-15 but getting ready to upgrade.
1) The system is set up to masq traffic from my internal network.
2) Accept VPN traffic from MS Clients.
3) Act as a firewall.
Everything works wonderfully with one exception.... FTP
Whenever anyone on the local net attempts to ftp from a browser it hangs and eventually times out. Attempts to ftp from the command line in NT can connect, but as soon as a file is requested or an ls is issued the system hangs. Here is an example:
200 PORT command successful.
150 Opening ASCII mode data connection for file list.
And it basically hangs indefinetly at the opening data connection part.
My firewall setting in order with regards to this problem are:
ipchains -M -S 14400 30 300
ipchains -A forward -i $INTERNET_NIC -d $INTERNET_NET -s $LOCAL_NET -j MASQ
Has anyone encountered and/or resolved this problem?