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FreeBSD Jail Access Private Network Via NAT and PF

I've FreeBSD 7.x server with 3 jails are configured to run a mail, web and MySQL services. My FreeBSD box has two network interfaces. First, interface is connected to LAN and other is directly connected to the Internet via public IP. My DNS servers are hosted on private network (LAN). FreeBSD 7.x jail only support one interface and one IP address. How do I configure jail (FreeBSD vps) to access my DNS servers hosted inside my LAN using PF firewall?
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PF Firewall Open FTP Port 21 (PASSIVE Configuration)

Question: I've vsftpd ftp server configured under FreeBSD 7.x and PF firewall. Both PF and FTP server running on a dedicated FreeBSD web server. How do I configure PASSIVE FTP PF firewall configuration so that my vsftpd work? How do I configure PF firewall to protect an FTP server and open port 21?
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BSD FTP-Proxy: PF Firewall Allow Outgoing Active / Passive FTP Connections

Q. I've FreeBSD based Apache webserver. I need to allow outgoing ftp client requests so that BSD ports collection can download from various ftp sites. How do I allow outgoing FTP connection via PF network firewall software under FreeBSD or OpenBSD operating system?
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