What is source based routing?
Source-based routing selects which gateway to direct outgoing client traffic through based on the source IP address in each packet header. When enabled, source-based routing automatically scans your network configuration to create client traffic rules.
How do I configure source based routing?
How to Configure PBR (Policy-Based Routing)?
- Step1: Configure ACLs. Permit statement in ACL is what will be matched.
- Step2: Configure route map instances.
- Step3: Configure match commands.
- Step4: Configure set commands.
- Step5: Configure PBR on the interface.
- Step6: (Optional) Configure local PBR.
What is policy based routing Linux?
Policy routing tables: Linux comes with three by default: local (which cannot be modified or deleted), main, and default. Somewhat unintuitively, routes added to the system without a routing table specified go to the main table, not the default table.
What is ETC iproute2 Rt_tables?
The /etc/iproute2/rt_tables file basically allows you to give meaningful names to the route tables. You can reference all the possible tables using just a number, but it is easier to remember and use them if you have a good name. There are a few predefined main=254.
Is source routing used?
Source routing can be used by attackers to probe the network by forcing packets into specific parts of the network. This allows an attacker to collect information about a network’s topology, or other information that could be useful in performing an attack.
What is the use of IP source routing?
To find the route that packets take through your network, attackers use IP source route attacks. The attacker sends an IP packet and uses the response from your network to get information about the operating system of the target computer or network device.
Which protocol is source routing protocol?
Internet Protocol In IPv6, two forms of source routing have been developed. The first approach was the Type 0 Routing header.
How do you implement policy based routing?
To enable policy-based routing, you must identify which route map to use for policy-based routing and create the route map. The route map itself specifies the match criteria and the resulting action if all of the match clauses are met.
Why we use policy-based routing?
Policy-based routing is a process whereby the device puts packets through a route map before routing them. The route map determines which packets are routed to which device next. You might enable policy-based routing if you want certain packets to be routed some way other than the obvious shortest path.
How many routing tables are there?
Answer is (B) 5. Routers have routing table. So there will be 5 routing tables each having 6 entries.
What is ip rule Fwmark?
ip rule. A full list of the possible parameters you can get here If this is not sufficient for you (i.e. an source port), you can use fwmark. These fwmark you can set with iptables, so can create an ip rule with every match iptables is capable of.
Why source routed traffic is a threat?
Should I disable source routing?
(Source routing is an IP option that allows the packet to specify the route it should take to its destination.) Source routing is a potential security problem, so it is best to disable this feature unless required.
What is policy-based routing and BGP?
The Policy-Based Routing feature is a process whereby a device puts packets through a route map before routing the packets. The route map determines which packets are routed next to which device. Policy-based routing is a more flexible mechanism for routing packets than destination routing.
What is port based routing?
Port based routing is a process that sends all the packets with a certain destination port to a certain IP which is not the configured default gateway.