├── .gitignore ├── LICENSE ├── README.md ├── caravan ├── __init__.py ├── arp.py ├── chassis.py ├── dhcp.py ├── icmp.py └── tcp.py └── nacker /.gitignore: -------------------------------------------------------------------------------- 1 | *.py[cod] 2 | 3 | # C extensions 4 | *.so 5 | 6 | # Packages 7 | *.egg 8 | *.egg-info 9 | dist 10 | build 11 | eggs 12 | parts 13 | bin 14 | var 15 | sdist 16 | develop-eggs 17 | .installed.cfg 18 | lib 19 | lib64 20 | 21 | # Installer logs 22 | pip-log.txt 23 | 24 | # Unit test / coverage reports 25 | .coverage 26 | .tox 27 | nosetests.xml 28 | 29 | # Translations 30 | *.mo 31 | 32 | # Mr Developer 33 | .mr.developer.cfg 34 | .project 35 | .pydevproject 36 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. 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It is safest 289 | to attach them to the start of each source file to most effectively 290 | convey the exclusion of warranty; and each file should have at least 291 | the "copyright" line and a pointer to where the full notice is found. 292 | 293 | Nacker is a tool to circumvent 802.1x Network Access Control (NAC) on a wired LAN. Nacker will help you locate any non-802.1x configurable hosts on your subnet, and spoof their MAC address so that you appear authenticated to the switch. 294 | Copyright (C) 2013 Carsten Maartmann-Moe 295 | 296 | This program is free software; you can redistribute it and/or modify 297 | it under the terms of the GNU General Public License as published by 298 | the Free Software Foundation; either version 2 of the License, or 299 | (at your option) any later version. 300 | 301 | This program is distributed in the hope that it will be useful, 302 | but WITHOUT ANY WARRANTY; without even the implied warranty of 303 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 304 | GNU General Public License for more details. 305 | 306 | You should have received a copy of the GNU General Public License along 307 | with this program; if not, write to the Free Software Foundation, Inc., 308 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 309 | 310 | Also add information on how to contact you by electronic and paper mail. 311 | 312 | If the program is interactive, make it output a short notice like this 313 | when it starts in an interactive mode: 314 | 315 | Gnomovision version 69, Copyright (C) year name of author 316 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 317 | This is free software, and you are welcome to redistribute it 318 | under certain conditions; type `show c' for details. 319 | 320 | The hypothetical commands `show w' and `show c' should show the appropriate 321 | parts of the General Public License. Of course, the commands you use may 322 | be called something other than `show w' and `show c'; they could even be 323 | mouse-clicks or menu items--whatever suits your program. 324 | 325 | You should also get your employer (if you work as a programmer) or your 326 | school, if any, to sign a "copyright disclaimer" for the program, if 327 | necessary. Here is a sample; alter the names: 328 | 329 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program 330 | `Gnomovision' (which makes passes at compilers) written by James Hacker. 331 | 332 | {signature of Ty Coon}, 1 April 1989 333 | Ty Coon, President of Vice 334 | 335 | This General Public License does not permit incorporating your program into 336 | proprietary programs. If your program is a subroutine library, you may 337 | consider it more useful to permit linking proprietary applications with the 338 | library. If this is what you want to do, use the GNU Lesser General 339 | Public License instead of this License. 340 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | Nacker 2 | ====== 3 | 4 | Nacker is a tool to bypass 802.1x Network Access Control (NAC) on a wired LAN. Nacker will help you locate any non-802.1x configurable hosts on your subnet, and spoof their MAC address so that you appear authenticated to the switch. 5 | 6 | The name "Nacker" is a derived from the word "knocker" and NAC; coincidentally combining them equals the slang for [Irish gypsy][1]. D'ya like dags? 7 | 8 | Important note 9 | -------------- 10 | This tool is currently in a non-working state. 11 | 12 | Introduction 13 | ------------ 14 | 15 | Increasingly often during internal pentests in modern environments, you will find that you'll not be able to just plug into the nearest Ethernet port to get access to the enterprise network. Most of the times this is because the network is protected by some sort of Network Access Control (NAC) functionality, wich essentially forces hosts on the network to authenticate to the switch, often using the 802.1x protocol with a backend authentication server, typically RADIUS. 16 | 17 | There are several ways to circumvent this problem, for example by using an Pwnie Plug or Marvin. 18 | 19 | However, there are often far easier ways to bypass NAC. As anyone that has been working in IT can tell you; even in brand new environments there will be legacy hosts on the network (think printers, video conferencing gear, monitoring boxes, etc.) that doesn't support 802.1x. The standard way IT solves this, is to create an exception for said hosts. 20 | 21 | So if we can figure out which hosts that are exempt authentication and mimic them on the network, we'll be exempt as well. Sweet! 22 | 23 | Nacker automates the procedure of finding exempt hosts on the local LAN, and mimicing them. It is a very simple and dumb tool, but it has the advantage of not requiring plugging in dedicated hardware between an authenticated host and the switch, which both Pwnie Plug and Marvin requires you to do. Just plug in, run Nacker, and with a little bit of luck you'll be authenticated on the network and able to enjoy network access as usual. 24 | 25 | [1]: http://www.urbandictionary.com/define.php?term=nacker 26 | -------------------------------------------------------------------------------- /caravan/__init__.py: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/carmaa/nacker/b67bb39872172fc5b813b20a6693cf8f27e7dab4/caravan/__init__.py -------------------------------------------------------------------------------- /caravan/arp.py: -------------------------------------------------------------------------------- 1 | ''' 2 | Nacker is a tool to circumvent 802.1x Network Access Control (NAC) on 3 | a wired LAN. 4 | 5 | Copyright (C) 2013 Carsten Maartmann-Moe 6 | 7 | This program is free software: you can redistribute it and/or modify 8 | it under the terms of the GNU General Public License as published by 9 | the Free Software Foundation, either version 3 of the License, or 10 | (at your option) any later version. 11 | 12 | This program is distributed in the hope that it will be useful, 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 | GNU General Public License for more details. 16 | 17 | You should have received a copy of the GNU General Public License 18 | along with this program. If not, see . 19 | 20 | Created on Aug 29, 2013 21 | 22 | @author: Carsten Maartmann-Moe aka ntropy 23 | ''' 24 | 25 | from scapy.all import srp,Ether,ARP,conf 26 | import sys 27 | import netaddr 28 | 29 | def pingsweep(net): 30 | conf.verb=0 31 | 32 | ans,unans=srp(Ether(dst="ff:ff:ff:ff:ff:ff")/ARP(pdst=str(net.cidr)),timeout=2) 33 | 34 | hosts = [] 35 | 36 | for snd,rcv in ans: 37 | mac = netaddr.EUI(rcv[Ether].src) 38 | mac.dialect = netaddr.mac_unix 39 | ip = rcv[ARP].psrc 40 | #print(ip, mac, mac.oui.registration().org) 41 | hosts.append([ip, mac]) 42 | 43 | return sorted(hosts) -------------------------------------------------------------------------------- /caravan/chassis.py: -------------------------------------------------------------------------------- 1 | ''' 2 | Nacker is a tool to circumvent 802.1x Network Access Control (NAC) on 3 | a wired LAN. 4 | 5 | Copyright (C) 2013 Carsten Maartmann-Moe 6 | 7 | This program is free software: you can redistribute it and/or modify 8 | it under the terms of the GNU General Public License as published by 9 | the Free Software Foundation, either version 3 of the License, or 10 | (at your option) any later version. 11 | 12 | This program is distributed in the hope that it will be useful, 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 | GNU General Public License for more details. 16 | 17 | You should have received a copy of the GNU General Public License 18 | along with this program. If not, see . 19 | 20 | Created on Aug 29, 2013 21 | 22 | @author: Carsten Maartmann-Moe aka ntropy 23 | ''' 24 | import platform 25 | import os 26 | import subprocess 27 | import netifaces 28 | import netaddr 29 | from subprocess import call 30 | 31 | LOCALHOST_ADDR = ['127.0.0.1', 'localhost'] 32 | 33 | def is_linux(): 34 | '''Verifies if the current platform is Linux''' 35 | os = platform.system() 36 | return os == 'Linux' 37 | 38 | 39 | def is_osx(): 40 | '''Verifies if the current platform is OS X''' 41 | os = platform.system() 42 | return os == 'Darwin' 43 | 44 | 45 | def is_root(): 46 | '''Verifies if the current user is root''' 47 | return os.getuid() & os.getgid() == 0 48 | 49 | 50 | def interfaces(): 51 | return [Interface(i) for i in netifaces.interfaces()] 52 | 53 | 54 | def ip_interfaces(): 55 | for iface in interfaces(): 56 | if iface.has_ip() and iface.not_localhost(): 57 | yield iface 58 | 59 | 60 | class Interface(): 61 | def __init__(self, name): 62 | self.name = name 63 | self.ifaddresses = None 64 | self.ip = None 65 | self.subnet = None 66 | self.netmask = None 67 | self.get_netaddr() 68 | 69 | def get_netaddr(self): 70 | try: 71 | self.ifaddresses = netifaces.ifaddresses(self.name)[netifaces.AF_INET][0] 72 | self.ip = netaddr.IPAddress(self.ifaddresses['addr']) 73 | self.netmask = netaddr.IPAddress(self.ifaddresses['netmask']) 74 | self.subnet = netaddr.IPNetwork('{0}/{1}'.format(self.ip, self.netmask)) 75 | except KeyError: 76 | pass 77 | 78 | def has_ip(self): 79 | return self.ip 80 | 81 | def not_localhost(self): 82 | return str(self.ip) not in LOCALHOST_ADDR 83 | 84 | def spoof_mac(self, mac): 85 | if is_linux(): 86 | '''Sets the new mac for the interface on a Linux system''' 87 | subprocess.check_call(['ifconfig','%s' % self.name, 'up']) 88 | subprocess.check_call(['ifconfig','%s' % self.name, 'hw', 'ether','%s' % mac]) 89 | else: 90 | '''Sets the new mac for the interface on a Darwin system''' 91 | subprocess.check_call(['ifconfig','%s' % self.name,'up']) 92 | subprocess.check_call(['ifconfig','%s' % self.name,'lladdr','%s' % mac]) 93 | 94 | def dhcp(self): 95 | if is_linux(): 96 | call(['dhclient', self.name]) 97 | else: 98 | call(['ipconfig', 'set', self.name, 'DHCP']) 99 | self.get_netaddr() 100 | -------------------------------------------------------------------------------- /caravan/dhcp.py: -------------------------------------------------------------------------------- 1 | ''' 2 | Nacker is a tool to circumvent 802.1x Network Access Control (NAC) on 3 | a wired LAN. 4 | 5 | Copyright (C) 2013 Carsten Maartmann-Moe 6 | 7 | This program is free software: you can redistribute it and/or modify 8 | it under the terms of the GNU General Public License as published by 9 | the Free Software Foundation, either version 3 of the License, or 10 | (at your option) any later version. 11 | 12 | This program is distributed in the hope that it will be useful, 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 | GNU General Public License for more details. 16 | 17 | You should have received a copy of the GNU General Public License 18 | along with this program. If not, see . 19 | 20 | Created on Aug 29, 2013 21 | 22 | @author: Carsten Maartmann-Moe aka ntropy 23 | ''' 24 | from scapy.all import * 25 | 26 | MESSAGE_TYPE_OFFER = 2 27 | MESSAGE_TYPE_REQUEST = 3 28 | MESSAGE_TYPE_ACK = 5 29 | MESSAGE_TYPE_NAK = 6 30 | MESSAGE_TYPE_RELEASE = 7 31 | 32 | def discover(): 33 | conf.checkIPaddr = False 34 | fam,hw = get_if_raw_hwaddr(conf.iface) 35 | ether = Ether(dst = 'ff:ff:ff:ff:ff:ff') 36 | ip = IP(src='0.0.0.0', dst = '255.255.255.255') 37 | udp = UDP(sport=68, dport=67) 38 | bootp = BOOTP(chaddr=hw) 39 | dhcp = DHCP(options = [('message-type','discover'),'end']) 40 | # Send packet 41 | ans = srp1(ether / ip / udp / bootp / dhcp) 42 | mtype = ans[DHCP].options[0][1] 43 | if mtype == MESSAGE_TYPE_OFFER: 44 | print('DHCP offer received for IP {0}'.format(ans[BOOTP].yiaddr)) 45 | return ans 46 | 47 | def request(pkt): 48 | conf.checkIPaddr = False 49 | #fam,hw = get_if_raw_hwaddr(conf.iface) 50 | ether = Ether(dst = 'ff:ff:ff:ff:ff:ff') 51 | ip = IP(src='0.0.0.0', dst = '255.255.255.255') 52 | udp = UDP(sport=68, dport=67) 53 | bootp = BOOTP(chaddr=pkt[BOOTP].chaddr, siaddr=pkt[BOOTP].siaddr, xid=pkt[BOOTP].xid) 54 | dhcp = DHCP(options = [('message-type','request'),('requested_addr',pkt[BOOTP].yiaddr),'end']) 55 | # Send packet 56 | ans = srp1(ether / ip / udp / bootp / dhcp) 57 | mtype = ans[DHCP].options[0][1] 58 | if mtype == MESSAGE_TYPE_ACK: 59 | print('DHCP acknowledgement received for IP {0}'.format(ans[BOOTP].yiaddr)) 60 | return ans -------------------------------------------------------------------------------- /caravan/icmp.py: -------------------------------------------------------------------------------- 1 | ''' 2 | Nacker is a tool to circumvent 802.1x Network Access Control (NAC) on 3 | a wired LAN. 4 | 5 | Copyright (C) 2013 Carsten Maartmann-Moe 6 | 7 | This program is free software: you can redistribute it and/or modify 8 | it under the terms of the GNU General Public License as published by 9 | the Free Software Foundation, either version 3 of the License, or 10 | (at your option) any later version. 11 | 12 | This program is distributed in the hope that it will be useful, 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 | GNU General Public License for more details. 16 | 17 | You should have received a copy of the GNU General Public License 18 | along with this program. If not, see . 19 | 20 | Created on Aug 29, 2013 21 | 22 | @author: Carsten Maartmann-Moe aka ntropy 23 | ''' 24 | from scapy.all import * 25 | 26 | def ping(ip): 27 | TIMEOUT = 2 28 | conf.verb = 0 29 | print('Pinging {0}'.format(ip)) 30 | packet = IP(dst=ip, ttl=20)/ICMP() 31 | reply = sr1(packet, timeout=TIMEOUT) 32 | if not (reply is None): 33 | print reply.src, "is online" 34 | return(True) 35 | else: 36 | print "Timeout waiting for %s" % packet[IP].src 37 | return(False) -------------------------------------------------------------------------------- /caravan/tcp.py: -------------------------------------------------------------------------------- 1 | ''' 2 | Nacker is a tool to circumvent 802.1x Network Access Control (NAC) on 3 | a wired LAN. 4 | 5 | Copyright (C) 2013 Carsten Maartmann-Moe 6 | 7 | This program is free software: you can redistribute it and/or modify 8 | it under the terms of the GNU General Public License as published by 9 | the Free Software Foundation, either version 3 of the License, or 10 | (at your option) any later version. 11 | 12 | This program is distributed in the hope that it will be useful, 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 | GNU General Public License for more details. 16 | 17 | You should have received a copy of the GNU General Public License 18 | along with this program. If not, see . 19 | 20 | Created on Aug 29, 2013 21 | 22 | @author: Carsten Maartmann-Moe aka ntropy 23 | ''' 24 | import threading 25 | import Queue 26 | import time 27 | from scapy.all import * 28 | from pprint import pprint 29 | 30 | THREADS = 4 31 | 32 | TOPPORTS = [80, # http 33 | 23, # telnet 34 | 22, # ssh 35 | 443, # https 36 | 3389, # ms-term-serv 37 | 445, # microsoft-ds 38 | 139, # netbios-ssn 39 | 21, # ftp 40 | 135, # msrpc 41 | 25] # smtp 42 | 43 | def synscan(target, portlist = Queue.Queue()): 44 | if portlist.empty(): 45 | for p in TOPPORTS: 46 | portlist.put(p) 47 | 48 | open_ports = [] 49 | 50 | started = time.time() 51 | print('SYN scan of {0} started at {1} {2}'.format(target, time.ctime(started), time.tzname[0])) 52 | 53 | threads = [] 54 | 55 | for i in range(1, THREADS + 1): 56 | #if cfg.verbose: 57 | #print('Creating Thread {0}'.format(i)) 58 | t = SYNScannerThread(target, portlist, i, open_ports) 59 | t.setDaemon(True) 60 | t.start() 61 | threads.append(t) 62 | 63 | portlist.join() 64 | 65 | for item in threads: 66 | item.join() 67 | #if cfg.verbose: 68 | #print(item.status) 69 | 70 | finished = time.time() 71 | print('Finished scanning in {0:5f} seconds at {1} {2}'.format((finished-started), time.ctime(finished), time.tzname[0])) 72 | 73 | return open_ports 74 | 75 | class SYNScannerThread(threading.Thread): 76 | def __init__(self, target, portlist, tid, open_ports): 77 | threading.Thread.__init__(self) 78 | self.target = target 79 | self.portlist = portlist 80 | self.tid = tid 81 | self.open_ports = open_ports 82 | self.status = '' 83 | 84 | 85 | def run(self): 86 | # ports scanned by this thread 87 | totalPorts = 0 88 | 89 | while True: 90 | port = 0 91 | try: 92 | port = self.portlist.get(timeout = 1) 93 | except Queue.Empty: 94 | break 95 | 96 | response = sr1(IP(dst = self.target)/TCP(dport = port, flags = 'S'), verbose = False) 97 | 98 | if response: 99 | # flags is 18 if SYN,ACK received 100 | # i.e port is open 101 | if response[TCP].flags == 18: 102 | self.open_ports.append(port) 103 | 104 | totalPorts += 1 105 | self.portlist.task_done() 106 | # end while block 107 | 108 | self.status = 'Thread {0} scanned {1} ports'.format(self.tid, totalPorts) 109 | -------------------------------------------------------------------------------- /nacker: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python 2 | ''' 3 | Nacker is a tool to circumvent 802.1x Network Access Control (NAC) on 4 | a wired LAN. 5 | 6 | Copyright (C) 2013 Carsten Maartmann-Moe 7 | 8 | This program is free software: you can redistribute it and/or modify 9 | it under the terms of the GNU General Public License as published by 10 | the Free Software Foundation, either version 3 of the License, or 11 | (at your option) any later version. 12 | 13 | This program is distributed in the hope that it will be useful, 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 | GNU General Public License for more details. 17 | 18 | You should have received a copy of the GNU General Public License 19 | along with this program. If not, see . 20 | 21 | Created on Aug 29, 2013 22 | 23 | @author: Carsten Maartmann-Moe aka ntropy 24 | ''' 25 | 26 | import getopt 27 | import os 28 | import sys 29 | import socket 30 | import netifaces 31 | from pprint import pprint 32 | from netaddr import IPNetwork 33 | from datetime import date 34 | from caravan import arp, dhcp, icmp, tcp, chassis 35 | from scapy.all import * 36 | 37 | VERSION = '0.0.1' 38 | URL = 'http://github.com/carmaa/nacker' 39 | PC_MANUFACTURERS = ['Apple', 'Lenovo', 'Dell', 'Hewlett-Packard', 40 | 'Acer' ,'ASUS', 'Fujitsu', 'Sony', 'Toshiba'] 41 | PRINTER_MANUFACTURERS = ['Xerox', 'Lexmark', 'Rioch', 'Canon', 'Brother'] 42 | 43 | 44 | def banner(): 45 | ''' 46 | Print obligatory banner 47 | ''' 48 | print('Nacker - bypass 802.1x LAN NAC') 49 | print('v{0} (C) Carsten Maartmann-Moe {1}'.format(VERSION, date.today().strftime("%Y"))) 50 | print('Download: {0} | Twitter: @breaknenter'.format(URL)) 51 | print('') 52 | 53 | 54 | 55 | def main(argv): 56 | encoding = sys.getdefaultencoding() 57 | 58 | banner() 59 | 60 | # Check if we're root 61 | if not chassis.is_root(): 62 | sys.exit(1) 63 | 64 | # Parse args 65 | try: 66 | opts, args = getopt.getopt(argv[1:], 'h', ['help']) 67 | except getopt.GetoptError as err: 68 | print(err) 69 | usage(argv[0]) 70 | sys.exit(2) 71 | for opt, arg in opts: 72 | if opt in ('-h', '--help'): 73 | usage(argv[0]) 74 | sys.exit() 75 | else: 76 | assert False, 'Option not handled: ' + opt 77 | 78 | # We don't accept any other arguments 79 | if args: 80 | term.warn('Arguments {0} ignored'.format(', '.join(args))) 81 | 82 | # Main logic goes here 83 | 84 | # Get interfaces, ip address and netmask 85 | # TODO: Error handling in the instance there's no interfaces with IP 86 | # TODO: Give the option to select interface in the instance of multi-homed 87 | iface = chassis.ip_interfaces().next() 88 | print('Using interface {0} with address {1} and netmask {2}:'.format( 89 | iface.name, iface.ip, iface.subnet.netmask)) 90 | original_ip = iface.ip 91 | 92 | # Do an ARP ping sweep against the subnet 93 | print('Performing an ARP ping sweep of the LAN') 94 | hosts = arp.pingsweep(iface.subnet) 95 | print('{0} live hosts found'.format(len(hosts))) 96 | 97 | # Check if we can ping the hosts, try until first answer or exhausted 98 | for host in hosts: 99 | if icmp.ping(host[0]): 100 | break 101 | 102 | ips = list(iface.subnet.iter_hosts()) 103 | first = ips.pop(0) 104 | last = ips.pop() 105 | print('Removing {0} and {1} from target list'.format(first, last)) 106 | hosts = [h for h in hosts if str(first) not in h] 107 | hosts = [h for h in hosts if str(last) not in h] 108 | 109 | # Sort the MAC addresses based on organization, laptops and workstations 110 | print('Sorting hosts to targeting printers first, and laptops last') 111 | hosts.sort(key = lambda host: host[1].oui.registration().org in PC_MANUFACTURERS) 112 | hosts.sort(key = lambda host: host[1].oui.registration().org in PRINTER_MANUFACTURERS, reverse=True) 113 | #pprint(hosts) 114 | 115 | # Portscan the first host to see if packets are dropped (baseline) 116 | print('Checking if we can communicate on the LAN by portscanning top 10 ports') 117 | baseline_tcp = tcp.synscan(hosts[0][0]) 118 | if baseline_tcp: 119 | print('Found {0} open ports:'.format(len(baseline))) 120 | for item in baseline_tcp: 121 | print(item) 122 | print('Are you sure you are on a LAN that is protected by NAC?') 123 | sys.exit(-1) 124 | else: 125 | print('No open ports found. Looks like you are on a NACed LAN. Let\'s roll') 126 | baseline_icmp = icmp.ping('google.com') 127 | 128 | # For each MAC address, grab it and ask for an IP 129 | 130 | for ip, mac in hosts: 131 | print('Setting mac: {0} (owned by {1})'.format(mac, ip)) 132 | iface.spoof_mac(mac) 133 | #dhcpoffer = dhcp.discover() 134 | #dhcpack = dhcp.request(dhcpoffer) 135 | iface.dhcp() 136 | if iface.ip != original_ip: 137 | print('IP changed') 138 | break 139 | pass 140 | #dhcp.discover(mac) 141 | # Check IP against IP originally associated with MAC - if they are not 142 | # equal, we're likely authenticated to the switch 143 | 144 | 145 | def usage(execname): 146 | print( 147 | '''Nacker is a tool to bypass 802.1x Network Access Control (NAC) on a wired LAN. 148 | 149 | Usage: ''' + os.path.basename(execname) + ''' [OPTIONS] 150 | 151 | Options: 152 | -h, --help: Displays this message.''') 153 | 154 | 155 | if __name__ == '__main__': 156 | main(sys.argv) 157 | --------------------------------------------------------------------------------