Then, you will reserve a node on another InstaGENI site that will be the "malicious" banking website. Click on "Site 1" and choose an InstaGENI site to bind to, then reserve your resources. dnsmasq for DNS and DHCP service, an Apache web server, the dsniff package for ARP and DNS spoofing, etc.) on the nodes.
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The RSpec also includes commands to install the necessary software (e.g. This should load a topology onto your canvas, with a client, a "good" network gateway implementing DHCP and DNS services, and a malicious attacker on the same LAN. In the GENI Portal, create a new slice, then click "Add Resources". If you are having trouble getting resources, you may use this monitoring page to find sites with publicly routable IPs available.) (Note: you will need one publicly routable IP on each InstaGENI site. This experiment involves resources on three separate InstaGENI sites, which you will reserve using two different RSpecs. When the client tries to get an IP address for the Bank of Hamilton site, the attacker returns the IP address of its server that is pretending to be the real Bank of Hamilton site:įinally, we see how this attack can be used to transparently capture a user's login credentials: Run my experimentįirst, reserve your resources. When the client looks for an IP address from DHCP, the attacker responds with an offer before the "good" server and is configured to be the client's nameserver. We also use a DHCP masquerade attack to similar effect. As a result, the client is sent to a server under the attacker's control, that is masquerading as the legitimate Bank of Hamilton website: In the next example, we use ARP spoofing for the attacker to impersonate the DNS server, and respond to DNS queries with a wrong IP address. Here is an example of a normal DNS lookup which returns a correct address for the Bank of Hamilton website from the "good" server on the LAN: However, there are other (less reliable) DNS attacks that can feasibly be carried out even without access to the victim's LAN. (For more information about DNS and DHCP services, see the experiment Basic home gateway services: DHCP, DNS, NAT.)ĭNS spoofing is easiest when both the attacker and victim are on the same LAN.
There are many different ways to do DNS spoofing. One kind of DNS spoofing attack is illustrated below: This kind of attack may be used in phishing attacks, to censor web traffic for some domains, to inject content such as advertisements into web traffic, or for other purposes. When DNS responses are forged, the victim will (unknowingly) connect to a different host than the one it intended to reach. If you're not sure if you have those skills, you may want to try Lab Zero first.ĭNS spoofing is a broad category of attacks in which a malicious attacker sends forged DNS responses.Ī DNS server translates human-readable names like "", into an IP address that applications need to connect to a remote resource (such as a website).
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You should have already uploaded your SSH keys to the portal and know how to log in to a node with those keys. To reproduce this experiment on GENI, you will need an account on the GENI Portal, and you will need to have joined a project. Take special care not to use this application in ways that may adversely affect other infrastructure outside of your slice! Users of GENI are responsible for ensuring compliance with the GENI Resource Recommended User Policy. This experiment involves running a potentially disruptive application over a private network within your slice on GENI. It should take about 120 minutes to run this experiment. In the other the attacker will use ARP spoofing to impersonate the legitimate DNS server and answer name resolution queries in its place. In one version, the attacker will masquerade as the legitimate DHCP server for the LAN and instruct clients to use the attacker for name resolution. This is an experimental demonstration of two ways a malicious attacker might redirect traffic for a website to its own "fake" version of the site. Menu Redirect traffic to a wrong or fake site with DNS spoofing on a LAN Fraida FundĠ7 July 2016 on education, security, dns, dhcp, application layer
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