added iptables scripts
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957ba3484e
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123
ipt-static-ruleset
Executable file
123
ipt-static-ruleset
Executable file
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#######################################################################################################################
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# Firewall configuration for this host ################################################################################
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#######################################################################################################################
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# Allow minimum for all VLANS (ping, dhcp, dns, ntp)
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sudo iptables -A INPUT -j ACCEPT -p icmp --icmp-type 8 -m comment --comment "accept incomming pings"
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sudo iptables -A OUTPUT -j ACCEPT -p icmp --icmp-type 8 -m comment --comment "accept outgoing pings"
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sudo iptables -A INPUT -j ACCEPT -p udp --dport 67:68 --sport 67:68 -m comment --comment "accept incomming dhcp"
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sudo iptables -A OUTPUT -j ACCEPT -p udp --dport 67:68 --sport 67:68 -m comment --comment "accept outgoing dhcp"
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sudo iptables -A INPUT -j ACCEPT -p udp --dport 53 -m comment --comment "accept incomming dns"
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sudo iptables -A INPUT -j ACCEPT -p tcp --dport 53 -m comment --comment "accept incomming dns"
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sudo iptables -A OUTPUT -j ACCEPT -p udp --dport 53 -m comment --comment "accept outgoing dns"
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sudo iptables -A OUTPUT -j ACCEPT -p tcp --dport 53 -m comment --comment "accept outgoing dns"
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sudo iptables -A INPUT -j ACCEPT -p udp --dport 123 -m comment --comment "accept incomming ntp"
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sudo iptables -A OUTPUT -j ACCEPT -p udp --dport 123 -m comment --comment "accept outgoing ntp"
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# Allow some usefull outgoing traffic for all VLANS (ssh)
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sudo iptables -A OUTPUT -j ACCEPT -p tcp --dport 22 -m comment --comment "accept outgoing ssh"
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# Allow established and related trafic
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sudo iptables -A INPUT -j ACCEPT -m conntrack --ctstate ESTABLISHED,RELATED -m comment --comment "accept all incomming established and related trafic"
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sudo iptables -A OUTPUT -j ACCEPT -m conntrack --ctstate ESTABLISHED,RELATED -m comment --comment "accept all outgoing established and related trafic"
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# Allow everything for trusted networks
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sudo iptables -A INPUT -j ACCEPT -i lo -m comment --comment "accept all incoming traffic of loopback device"
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sudo iptables -A OUTPUT -j ACCEPT -o lo -m comment --comment "accept all outgoing traffic of the loopback device"
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sudo iptables -A INPUT -j ACCEPT -i eth0 -m comment --comment "accept all incoming traffic of eth0.30 device"
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sudo iptables -A OUTPUT -j ACCEPT -o eth0 -m comment --comment "accept all outgoing traffic of the eth0.30 device"
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sudo iptables -A OUTPUT -j ACCEPT -o eth0.10 ! -d 192.168.0.0/16 -m comment --comment "accept all outgoing traffic to the internet"
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# Add reject rule for propper feedback
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sudo iptables -A INPUT -j REJECT -m comment --comment "Reject all remaining traffic"
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#######################################################################################################################
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# Cros VLAN forwarding ################################################################################################
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#######################################################################################################################
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# General
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sudo sh -c "echo 1 > /proc/sys/net/ipv4/ip_forward"
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sudo iptables -A FORWARD -j ACCEPT -m conntrack --ctstate ESTABLISHED,RELATED -m comment --comment "forward all established and related traffic"
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sudo iptables -A FORWARD -j ACCEPT -p icmp --icmp-type 8 -m comment --comment "forward all pings"
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sudo iptables -A FORWARD -j ACCEPT -p udp --dport 123 -m comment --comment "forward all ntp request"
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sudo iptables -A FORWARD -j ACCEPT -p udp --sport 123 -m comment --comment "forward all ntp request"
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#---------------------
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# -> VLAN10 (Internet)
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#---------------------
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# Allow VLAN30 full access to the internet
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sudo iptables -A FORWARD -j ACCEPT -i eth0 -o eth0.10 ! -d 192.168.0.0/16 -m comment --comment "forward all traffic from vlan30 to the internet"
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sudo iptables -A FORWARD -j ACCEPT -i eth0 -o eth0.10 -d 192.168.0.0/24 -m comment --comment "forward all traffic from vlan30 to vlan10"
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# Allow VLAN40 access to to http,https
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sudo iptables -A FORWARD -j ACCEPT -i eth0.40 -o eth0.10 ! -d 192.168.0.0/16 -p tcp --dport 80:443 -m comment --comment "forward all http and https traffic from vlan40 to the internet"
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sudo iptables -A FORWARD -j ACCEPT -i eth0.40 -o eth0.10 ! -d 192.168.0.0/16 -p tcp --dport 8080 -m comment --comment "forward port 8080 to the internet for siemens dishwasher"
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# Allow VLAN60 access to to http,https
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sudo iptables -A FORWARD -j ACCEPT -i eth0.60 -o eth0.10 ! -d 192.168.0.0/16 -p tcp --dport 80:443 -m comment --comment "forward all http and https traffic from vlan60 to the internet"
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#--------------------
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# -> VLAN20 (Network)
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#--------------------
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# Allow VLAN30 full access
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sudo iptables -A FORWARD -j ACCEPT -i eth0 -o eth0.20 -d 192.168.20.0/24 -m comment --comment "forward traffic from vlan30 to VLAN20"
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#--------------------------------------
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# -> VLAN30 (Family) - VERY RESTRICTIVE
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#--------------------------------------
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# Allow VLAN40 and VLAN50 access to the mqtt port
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sudo iptables -A FORWARD -j ACCEPT -i eth0.40 -o eth0 -p tcp --dport 1883 -d 192.168.30.0/24 -m comment --comment "forward mqtt traffic from vlan40 to VLAN30"
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sudo iptables -A FORWARD -j ACCEPT -i eth0.50 -o eth0 -p tcp --dport 1883 -d 192.168.30.0/24 -m comment --comment "forward mqtt traffic from vlan50 to VLAN30"
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sudo iptables -A FORWARD -j ACCEPT -i eth0.50 -o eth0 -p tcp --dport 21 -d 192.168.30.0/24 -m comment --comment "forward ftp traffic from vlan50 to VLAN30 (brother printer)"
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#-------------------------------
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# -> VLAN40 (Untrusted Internet)
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#-------------------------------
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# Allow VLAN30 full access
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sudo iptables -A FORWARD -j ACCEPT -i eth0 -o eth0.40 -d 192.168.40.0/24 -m comment --comment "forward traffic from vlan30 to VLAN40"
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#---------------------------------
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# -> VLAN50 (Untrusted no Internet
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#---------------------------------
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# Allow VLAN30 full access
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sudo iptables -A FORWARD -j ACCEPT -i eth0 -o eth0.50 -d 192.168.50.0/24 -m comment --comment "forward traffic from vlan30 to VLAN50"
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#------------------
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# -> VLAN60 (Gäste)
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#------------------
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#----------------------
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# Masquerade traffic to
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#----------------------
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sudo iptables -t nat -A POSTROUTING -o eth0.10 -j MASQUERADE -m comment --comment "masquerade ->eth0.10"
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sudo iptables -t nat -A POSTROUTING -o eth0.20 -j MASQUERADE -m comment --comment "masquerade ->eth0.20"
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sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE -m comment --comment "masquerade ->eth0.30"
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sudo iptables -t nat -A POSTROUTING -o eth0.40 -j MASQUERADE -m comment --comment "masquerade ->eth0.40"
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sudo iptables -t nat -A POSTROUTING -o eth0.50 -j MASQUERADE -m comment --comment "masquerade ->eth0.50"
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#######################################################################################################################
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# Change policy to drop all remainig ##################################################################################
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#######################################################################################################################
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sudo iptables -P INPUT DROP
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sudo iptables -P OUTPUT DROP
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sudo iptables -P FORWARD DROP
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#######################################################################################################################
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# Show configuration ##################################################################################################
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#######################################################################################################################
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sudo iptables -L -n -v --line-numbers
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echo "********************************************************************************************"
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echo "* -> Execute sudo sh -c \"iptables-save > /etc/iptables/rules.v4\""
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echo "********************************************************************************************"
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98
vlanm
Executable file
98
vlanm
Executable file
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#!/bin/python3
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#
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import argparse
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from getpass import getpass
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import re
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import subprocess
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def device_by_vlan(n):
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return 'eth0' if n == 10 else 'eth0.%d' % n
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def iprange_by_vlan(n):
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return '192.168.0.0/24' if n == 10 else '192.168.%d.0/24' % n
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def get_iptables_info():
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global password
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my_cmd = "sudo -S iptables -L -n -v --line-numbers".split()
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cmd = subprocess.run(my_cmd, stdout=subprocess.PIPE, input=password, encoding="ascii",)
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return cmd.stdout
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def get_rule_num(chain, comment):
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required_chain = False
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for line in get_iptables_info().split('\n'):
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if line.strip().lower().startswith('chain'):
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required_chain = line.strip().lower().startswith('chain ' + chain.strip().lower())
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if required_chain:
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rule_num = None
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try:
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rule_num = int(line.split()[0])
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except:
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pass
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else:
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s = re.search(r'\/\*(.*?)\*\/', line)
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if s is not None:
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if s.group(1).strip() == comment:
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return rule_num
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if __name__ == "__main__":
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global password
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prog = 'vlan manager'
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description = 'Add and removes iptable rules for a given vlan'
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epilog = 'Text at the bottom of help'
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parser = argparse.ArgumentParser(prog=prog, description=description, epilog=epilog)
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parser.add_argument('-v', '--vlan_number', type=int, required=True, help="Define the vlan to be used")
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parser.add_argument('-o', '--open_to_internet', action='store_true', help="Toggle rule: Open vlan to the internet")
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parser.add_argument('-l', '--log_to_internet', action='store_true', help="Toggle rule: Log vlan to the internet")
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args = parser.parse_args()
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UID_O = 'VLANM_RULE__OPEN_TO_INTERNET_%d' % args.vlan_number
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UID_L = 'VLANM_RULE__LOG_TO_INTERNET_%d' % args.vlan_number
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if args.open_to_internet:
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password = getpass("password: ")
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print()
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rn = get_rule_num('forward', UID_O)
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if rn is None:
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print("Add rule:", UID_O)
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else:
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print("Remove rule:", UID_O)
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if getpass('Proceed? [Y/n]') in ['', 'y', 'Y']:
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if rn is None:
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my_cmd = ['sudo', '-S', 'iptables', '-A', 'FORWARD', '-j', 'ACCEPT', '-i', device_by_vlan(args.vlan_number), '-o', 'eth0', '!', '-d', '192.168.0.0/16', '-m', 'comment', '--comment', UID_O]
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cmd = subprocess.run(my_cmd, stdout=subprocess.PIPE, input=password, encoding="ascii",)
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print(cmd.stdout)
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else:
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my_cmd = ['sudo', '-S', 'iptables', '-D', 'FORWARD', str(rn)]
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cmd = subprocess.run(my_cmd, stdout=subprocess.PIPE, input=password, encoding="ascii",)
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print(cmd.stdout)
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elif args.log_to_internet:
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password = getpass("password: ")
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print()
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rn = get_rule_num('forward', UID_L)
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if rn is None:
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print("Add rule:", UID_L)
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else:
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print("Remove rule:", UID_L)
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if getpass('Proceed? [Y/n]') in ['', 'y', 'Y']:
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if rn is None:
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my_cmd = ['sudo', '-S', 'iptables', '-A', 'FORWARD', '-j', 'LOG', '-i', device_by_vlan(args.vlan_number), '-o', 'eth0', '!', '-d', '192.168.0.0/16', '-m', 'comment', '--comment', UID_L]
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cmd = subprocess.run(my_cmd, stdout=subprocess.PIPE, input=password, encoding="ascii",)
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print(cmd.stdout)
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print("Use 'sudo ~/bin/ftail /var/log/kern.log' to view the logs.")
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else:
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my_cmd = ['sudo', '-S', 'iptables', '-D', 'FORWARD', str(rn)]
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cmd = subprocess.run(my_cmd, stdout=subprocess.PIPE, input=password, encoding="ascii",)
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print(cmd.stdout)
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else:
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print("************************")
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print("* No action specified! *")
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print("************************")
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print()
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parser.print_help()
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