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OpenBSD / FreeBSD / NetBSD: PF Firewall List Rules

I can use iptables -L -n command with Linux operating system to list the current firewall rules. How do I list all the current firewall rules under OpenBSD / FreeBSD / NetBSD operating systems? How can I see all pf firewall rules using command line tool?
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I've root ssh access and need to add / delete a few IP address on fly using the IPtables command via local shell script. How do I add or delete an IP address remotely over the SSH session under CentOS / Redhat / RHEL / Debian / Ubuntu Linux?
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I am a brand new user of a Linux iptables and I can't find how to instruct my iptables to delete or unblock an IP address listed in iptables firewall. I'm using Debian Linux version. Can you help please?
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FreeBSD Stop IPFW Firewall

Q. How do I IPFW firewall in FreeBSD using a shell prompt or over remove ssh login?
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FreeBSD Setting up Firewall using IPFW

Q. I'm new to FreeBSD and am trying to configure the firewall using IPFW, but I'm having a hard time understanding it as compare to Linux. Can you provide a small example on how to go about setting up the rules for a typical FreeBSD based Apache Web server?
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