Websense and triton are registered trademarks and riskvision is a trademark of. With an explicit proxy deployment, client software, typically a web browser. When enabled, the ip spoofing feature directs the proxy to use the client ip. It should come as no surprise then, that criminals who conduct their nefarious activities on networks and computers should employ such techniques. In networking, the term is used to describe a variety of ways in which hardware and software can be fooled. While ip spoofing used to be a much more serious and more frequently abused exploit than it is now, it is still occasionally a cause of distress for webmasters. Enabling wccp processing for a service group forcepoint. The redirect exclude in command prevents the router from looping the traffic back to content gateway. If you are configuring for ip spoofing, see the table in ip spoofing for common reverse service groups ids. Configuring wccp v2 with websense content gateway the web. Introduction web cache communication protocol wccp is a. Wccp service group ids are user defined and must be programmed on the wccp device s and in content gateway see configuring service groups on the wccp device and configuring service groups in content gateway manager. When an attacker uses a fake ip for the packets he sends, he will usually not be able to receive the answer, unless he has some extensive power over the overall network. Lets say i am in spain, can i somehow connect to a server in the us with an ip address that is allocated to mexico.
Note that the wccp assignment method not virtual ip failover is the recommended method for managing load distribution. Cisco wan ip spoofing and redirect inbound traffic c3750. When ip spoofing is enabled, the proxy advertises a reverse service group for each enabled wccp forward service group. Membership in the cisco customer connection program is required to attend. This software is intended to give a general framework to build and plug voip protocol analizers in order to fix security issues and enhance voip platforms confidence. The ip spoofing vulnerability is the most fundamental vulnerability of the tcpip architecture, which has proven remarkably scalable, in part due to the design choice to leave responsibility for security to the end hosts. We want design a topology based on transparent proxies using wccp. A plan to deploy websense content gateway as a proxy in your network involves. Thus, the tcpip internet architecture includes no explicit notion of authenticity. The sw role as an interface 1scans all the registered ip addresses for their authenticity. While the data in this report is the most comprehensive of its type we are aware of, it is still an ongoing, incomplete project. Ip spoofing is one of the most common forms of online camouflage. When arm bypass occurs, or ip spoofing is enabled, the proxy sends traffic to the internet with the original source ip address.
The reverse service group must be applied along the return path of the proxy. Installation guide supplement websense knowledge bases. Wccp with websense hi, on hardware assist switches 65k, 3700, 45k etc wccp redirect counters for show ip wccp commands should not show increments since all redirected traffic is handled in tcam and cpu do not get involved. Wccp on cisco asa and websense solutions experts exchange. Policybased routing can be implemented to achieve the same results. With an explicit proxy deployment, client software is configured to send a.
When ip spoofing is enabled and the appliance is connected to a wccp router, you must configure two wccp services. See the documentation for the software revision and hardware model of the. Wccp configuration example for catalyst 3560 or 3750 cisco. Note any form of source ip spoofing arm bypass or the ip spoofing feature itself at this time is not supported by the asa. We are looking to see if the number of routers and cache devices is greater than zero.
In transparent proxy deployments, integration with wccp v2enabled network devices. Can you paste the output of show ip wccp 0 and show ip wccp 70. It is generally used to maintain anonymity and cause havoc on the internet. How do you configure a web cache communication protocol wccp on a cisco catalyst 3560 or 3750 switch. As it goes through the firewall it then gets changed to the ip of the firewall prior to hitting the internet. The macip antispoof cache lists all mac address to ip address bindings, which can include all the devices presently listed as authorized to access the network, and all devices marked as blacklisted denied access from the network.
Cisco web security appliance wsa and cisco catalyst 3560 or 3750 wccp is only supported on the catalyst 35603750 running ip services or advanced ip services feature sets, on ios 12. Deep dive into wccp load balancing xforwardedfor, proxies, and ips. Wccp web cache communication protocol is a content routing protocol developed by cisco that allows you to redirect traffic in real time. Review wccp sample configuration for cisco firewalls for additional information. The numbers in the diagram correspond to the actions described in the numbered list. Traffic from the wcg in this instance must bypass the asa. Ip spoofing, for example, involves trickery that makes a message appear as if it came from an authorized ip address. Ip spoofing is sometimes used to support upstream activities that require the client ip address or a specific ip address. During this masking process, the fake ip address sends what appears to be a malevolent message coupled with an ip address that appears to be authentic and. If a content gateway cluster receives requests both explicitly and transparently the networks must be separate. Wccp v2 devices intercept traffic, usually on ports 80 and 443, and redirect it to the proxy arm module receives the traffic and readdresses it to content gateway, which performs security functions acting on behalf of the client now, the traffic is readdressed by arm, restoring the origin server ip address and port number traffic exits network with. Wccpenabled router or layer 4 switch to redirect traffic, as described below. Dns spoofing occurs when a particular dns servers records of spoofed or altered maliciously to redirect traffic to the attacker.
This report, provided by caida, intends to provide a current aggregate view of ingress and egress filtering and ip spoofing on the internet. Cisco application and content networking system acns software retirement notification. Ip hider will automatically configure all browsers indifferent the one you are using so you can browse invisible without concerns. In transparent proxy deployments using wccp and ip spoofing, with gre or l2 mode negotiation, neither hash nor mask are supported on the source port or. Ipspoofing software in technical discussion part 3. Packets with spoofed ip addresses are more difficult to filter since each spoofed packet appears to come from. Under the security services web proxy settings menu, you enable transparent mode with ip spoofing for transparent connections only. Ip spoofing tools, free ip spoofing tools software downloads.
Web redirection is working current for a test vlan using wccp redirection on the layer 3 vlan interface. Howevercommaspoofing in such a manner would only permit oneway. Also on the proxy if you have ssh access you can do a tcpdump on port 2048 which is port to see if it is receiving the hear i am packets. When ip spoofing is enabled and the appliance is connected to a wccp. I thought according to websense that ip spoofing is not available with the cisco asa because of the fact that it would create a layer 3 routing loop between the asa and wcg. An important point must be made, which is that ip spoofing is limitative. Visual framework tool to scansniff address space, enumerate users, crack credentials, pattern based dial spoofing and security reporting for voip protocols. When modifying the accesslist in a cisco firewall environment, remove all of the wccp commands first, make the changes to the accesslist, and then reenter the wccp commands. Now you can trace your network activity on world map.
Websense installation guide supplement for integrated cisco products x 9 configuring a cisco security appliance after websense software is installed, the cisco security appliance, pix firewall or adaptive security appliance asa, must be configured to work with websense the. Ip spoofing is sometimes used to support upstream activities that require the client. For example, if a dns record is spoofed, then the attacker can manage to redirect all the traffic that relied on the correct. Ip hider is a hide ip address software that prevents your surfing habits and your internet activity over the internet from being tracked by websites or internet service providers. When ip spoofing is enabled, the proxy advertises a reverse service group for. Original client ip address being proxied before being. Find answers to original client ip address being proxied before being filtered through ips. Split dns permits the content engine to be configured with multiple domain name system dns servers. Unless ip spoofing is used by the web proxy, it is usual for requests flowing through. The reverse service group must be applied along the return path of origin server responses to the proxy. When ip spoofing is enabled, the proxy advertises a reverse service group for each enabled wccp service.
Were in the process of deploying ironport web content filters on our network with wccp redirection from a pair of nexus 7010s running nxos 5. When we enable ip spoofing on websense wcg the browsing get down. Wccp service group ids are user defined and must be programmed on the wccp device s and in content gateway see configuring service groups on the wccp device and configuring service groups in the content gateway manager. This is brief demonstration of wccp configuration between cisco asa series firewall and websense content gateway. Also see email spoofing spoofing is also used as a network management technique to reduce traffic.
Unlike ip address spoofing, where senders spoof their ip address in order to cause the receiver to send the response elsewhere, in mac address spoofing the response is usually received by the spoofing party if switch is not configured to prevent mac spoofing. Ip address spoofing is sometimes referred to as ip address forgery, and as the name suggests its a technique commonly used by hackers to perform malicious activities, such as man in the middle mitm, denial of service dos and dedicated denial of service ddos attacks. Cisco acns software enables several flexible network deployments. You can view a listing of available application networking services offerings that best meet your. A typical use case for wccp would be if you have a proxy or load balancer that you want to redirect traffic to, all transparent to the. Network connectivity problems have occurred when altering the access. Configuring wccp with cisco asa and websense content gateway. Geo spider helps you to trace, identify and monitor your network activity on world map. Cisco wan ip spoofing and redirect inbound traffic c3750 oct 9, 2012. When enabled, the ip spoofing feature directs the proxy to use the client ip address. How to spoof an ip address in windows 7 using free. The wccp service on the wsa then registers automatically with the sup720. Xforwardedfor, proxies, and ips not always the network.
Ip spoofing is the action of masking a computer ip address so that it looks like it is authentic. The wccp configuration options appear on the configure pane only if you have. This redirection of traffic allows the attacker to spread malware, steal data, etc. You may still need to issue the ip wccp 90 redirect in. Ip spoofing for windows cnet download free software. For both groups, you enter the ip address of the svi as the upstream router address the ip address of vlan 20 in this case. It also results in origin servers seeing the client or specified ip address instead of the proxy ip address although the proxy ip address can be a specified ip address. Ip spoofing refers to connection hijacking through a fake internet protocol ip address. Mac address spoofing is limited to the local broadcast domain. If you do like to configure wccp with the ip spoofing and having. Hello guys i have one confusion for wccp, scenario is asa2 websense box there are 2 websense box 2 wccp servers, as per my knowledge only one server is going to be active correct even if i assign 2 wccp server ip address on asa. Our uncompromising systems enable companies to empower employees with unobstructed access to confidential data while protecting intellectual property and simplifying compliance.