FTP is a protocol that relies on two channels; a control channel (the
typical port 21), and a data channel (random ports, established when
transferring files).
In this case, sounds like you can’t setup the data-channel. Which means
that the protocol helper isn’t loaded, or not monitoring the right FTP
control port (ie: if you have your server on an alternate port).
Check-out the FTP connection-tracking section of:
http://www.shorewall.net/FTP.html
Kris
*From:* Alias [mailto:[email protected]]
*Sent:* August-21-12 7:45 AM
*To:* [email protected]
*Subject:* [Shorewall-users] Slow Uploads with DSL0
Hi all
Environment:
+ opensuse 12.1 (x86)
+ 1Gb Ram & 2vCPU
+ ifconfig:
- dsl0 (Net)
- eth0 (pppoe|dhcp)
- eth1 (Lan)
+ pppoe
+ Netcomm NB5 adsl2+ router (bridge mode)
Zones
lan ipv4 #
net ipv4 #
fw firewall
Interfaces
lan eth1
net dsl0 - dhcp
Policy (due to troubleshooting)
all all ACCEPT
Masq
dsl0 eth1
Additional Info:
Net to Firewal|Lan traffic (Downloads) use all available bandwidth. All OK.
Problem:
All Firewall & Lan traffic to Net (Uploads) timeout or transmit very little
data.
Scenario: LAN FTP Server or LAN SMTP. Internet client connects to either
(NAT). pushing data (downloading) to either server is OK, however
retrieving data (Uploading) fails.
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