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What are the firewall characteristics of HylaFSP? |
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HylaFSP uses passive FTP to communicate with the HylaFAX server. A control channel is established on port 4559 and then a data channel is opened on a random passive FTP port. Therefore, your firewall must understand passive FTP on port 4559.
If you are using iptables as your firewall, the following command will configure the firewall for passive FTP on the correct ports for standard FTP and HylaFSP.
Please run as root:
modprobe ip_conntrack_ftp ports=21,4559
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