9/10/2023 0 Comments Http proxy sniffer![]() ![]() Not super-easy, but far from impossible either. When you get the packets, you have to read the ethernet headers (and you can filter based on the targets mac addresses), and then you have to pick out the IP-packets, as well as the TCP/UDP-packets and put them in order to get something reasonable out of the traffic. I'm not sure how well windows does this, but anyway. When you both get the traffic on the wire and your network adapter takes them in unfiltered, your program will get all the packets exactly as they are sent on the network (although you have to make sure you OS's TCP-UDP/IP stack doesn't sneak in an pick up TCP packets you would want to listen to, but if you target two other computers configuration that would not be a problem. You also want your network card in what is called "promiscuous mode", where it takes in all packets without filtering on MAC-address. Unless you have any filters set you forgot to tell us about, so make sure you sniff all traffic originating from or going to 192.168.1.You want what is called Raw Socket access (and use a hub or a switch that can send all the packets to your network adapter). Otherwise if there are no special routes and all traffic passes through 192.168.1.1 either with or without proxy, there is no good reason why you would see the traffic in once case and not see it in the other. ![]() it has multiple network interfaces, one connected to the 192.168.1.1/24 network and another one connected to the 172.x.x.x network? That would be a perfect explaination. Might it be the case that your User machine is multi-homed, i.e. This will possibly help you understand how or why not you can eavesdrop the traffic. To understand which way traffic to your proxy server takes. You are not saying what OS your User machine is running, but try some commands along the lines of traceroute 172.27.0.50 In case it is an inhouse proxy, it can be reached from the User machine 192.168.1.5 either through the default gateway 192.168.1.1 or there must be a separate route defined to that network. Question: Is that some in-house proxy or is the proxy possibly provided by your ISP? Obviously, your proxy server sits on an entirely different network segment than your other three machines. You mention three distinct machines in your scenario:īut in order to better understand what's going on, you need to clear that there is another machine here, so the list would be: You will have to ask yourself how bettercap can get a hold of traffic. I don't have any access to target machine. All its traffic is passing through the gateway only. My target is using IE 11 with on Windows 7 with proxy configured. User-Agent: Mozilla/5.0 (Windows NT 6.1 Trident/7.0 rv:11.0) like Gecko My question is more towards topological scenario.and how to overcome that.? Bettercap is working perfectly.Īnd getting this output You're using bettercap as a normal HTTP(S) proxy, it wasn't designed to handle CONNECT requests: Is it possible in such a setup to intercept traffic with bettercap? Is there any other way to achieve the same without bettercap? bettercap -T 192.168.1.5 -proxy -P POST I guess this is normal since with proxy traffic is going to the proxy server rather than the gateway. The HTTP Sniffer can also be used to analyze HTTP traffic and to trap particular POST or GET requests that can be changed on-the-fly (manually or automatically) to emulate a man-in-the-middle attack. But as soon as a proxy is set in the browser connection settings, bettercap is unable to see traffic. The HTTP Sniffer is a proxy that allows you to analyze HTTP requests and responses, and manually crawl a site structure. With no proxy configured it is working fine. Using bettercap, how can I intercept traffic which goes to a proxy server which is configured in browser? ![]()
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