From Perimeter Router Security Technical Implementation Guide Juniper
Part of IPv4 Loopback address is not blocked
Associated with IA controls: ECSC-1
This type of IP address spoofing occurs when someone outside the network uses a local host address to gain access to systems or devices on the internal network. If the intruder is successful, they can intercept data, passwords, etc., and use that information to perform destructive acts on or to the network.
Review the perimeter device configuration to ensure access control lists are configured to block, deny, or drop inbound IP addresses using the local host IP address space of 127.0.0.0/8. Depending on the security posture of the access control list, this requirement may be met explicitly or inexplicitly. Config Example: [edit interfaces] fe-2/0/10 { description "to NIPRNet core router"; speed 100m; link-mode full-duplex; unit 0 { family inet { filter { input ingress-filter; } address 199.36.92.1/30; } } } [edit firewall] family inet { filter ingress-filter { term term-1 { from { source-address { 127.0.0.0; } } then discard; } } }
Configure the perimeter device to ensure access control lists are configured to block, deny, or drop inbound IP addresses using the local host IP address space of 127.0.0.0/8. Depending on the security posture of the access control list, this requirement may be met explicitly or inexplicitly.
Lavender hyperlinks in small type off to the right (of CSS
class id, if you view the page source) point to
globally unique URIs for each document and item. Copy the
link location and paste anywhere you need to talk
unambiguously about these things.
You can obtain data about documents and items in other
formats. Simply provide an HTTP header Accept:
text/turtle or
Accept: application/rdf+xml.
Powered by sagemincer