I can make bash script for you qualitatively, because I am certified network engineer having over 10 years of enterprise experience with network devices, Linux and I did complex IPTables rules earlier
Relevant Skills and Experience
switching and routing,
security and firewalls (IPTables, IPFW),
VPN (OpenVPN, L2TP/IPSec, PPtP),
Debian\FreeBSD,
scripting with bash
Finished courses:
Cisco TSHOOT/SWITCH,
CCNAX,
Linux LL-101.
Proposed Milestones
$25 USD - bash script for iptables
Stay tuned, I'm still working on this proposal.