What is ingress/egress route filtering?
Ingress filtering is one type of packet filtering. Its counterpart is egress filtering, which is used to examine outbound traffic and only allows packets to leave the network if they meet predetermined policies set by an administrator.
What RFC 2827?
Here are the details, straight from the source (RFC 2827): If properly implemented, RFC 2827 can reduce certain types of IP spoofing attacks against your networl and can also prevent IP spoofing attacks (beyond the local range) from being launched against others from your site.
What is rfc3704?
Introduction BCP 38, RFC 2827 [1], is designed to limit the impact of distributed denial of service attacks, by denying traffic with spoofed addresses access to the network, and to help ensure that traffic is traceable to its correct source network.
What is RFC and BCP?
RFCs and BCPs are formal documents published by the IETF (Internet Engineering Task Force). The acronym RFC means Request For Comments. For example, BCP 38 is also RFC 2827. BCPs describe guidelines, processes, methods and other subjects not suitable for a standard.
What is bcp38 Openwrt?
Quick detour: bcp 38 addresses source address spoofing; in short it instructs openwrt to discard packets with an “impossible” source address (any source address from outside the address range/pool the router “knows” it handles on its LAN side).
How does egress filtering work?
Egress filtering controls the traffic that is attempting to leave the network. Before an outbound connection is allowed, it has to pass the filter’s rules (i.e. policies). These rules are set by the administrator. Almost every UTM firewall provides egress filtering (also known as outbound filtering).
How can spoofing be prevented?
The options to protect against IP spoofing include monitoring networks for atypical activity, deploying packet filtering to detect inconsistencies (like outgoing packets with source IP addresses that don’t match those on the organization’s network), using robust verification methods (even among networked computers).
What is anti spoof checking?
Antispoofing is a technique for identifying and dropping packets that have a false source address. Spoofed packets are commonly used to carry out denial of service (DoS) attacks, exploit network and system vulnerabilities and gain unauthorized access to corporate networks and data.
https://www.youtube.com/watch?v=-9JrAtPgWW8