Add packet filtering + fix broken link

Author: Maddy-Cloudflare

src/content/docs/cloudflare-one/traffic-policies/index.mdx

@@ -9,6 +9,7 @@ import { Render, Stream } from "~/components";
 
 Cloudflare Gateway, our comprehensive [Secure Web Gateway](https://www.cloudflare.com/learning/access-management/what-is-a-secure-web-gateway/), allows you to set up policies to inspect DNS, Network, HTTP, and Egress traffic.
 
+- **Packet filtering** inspect and filter unwanted traffic based on packet attributes. Packet filtering policies block threats regardless of user or session context. Traffic is matched in the order the configured rules.
 - **DNS policies** inspect DNS queries. You can block domains and IP addresses from resolving on your devices. For more information on DNS filtering, refer to our [Learning Center article](https://www.cloudflare.com/learning/access-management/what-is-dns-filtering/).
 - **Network policies** inspect individual TCP/UDP/GRE packets. You can block access to specific ports on your origin server, including non-HTTP resources.
 - **HTTP policies** inspect HTTP requests. You can block specific URLs from loading, not just the domain itself. For more information on URL filtering, refer to our [Learning Center article](https://www.cloudflare.com/learning/access-management/what-is-url-filtering/).

src/content/docs/cloudflare-one/traffic-policies/packet-filtering/protocol-validation-rules.mdx

@@ -7,6 +7,6 @@ sidebar:
 
 Magic Firewall supports [Session Initiation Protocol (SIP)](https://datatracker.ietf.org/doc/html/rfc2543) to inspect traffic validity and enforce a positive security model.
 
-You can use the `sip` field when creating a rule to determine if packets are valid SIP Layer 7 (L7) protocol. Refer to [Magic Firewall fields](/cloudflare-one/reusable-components/magic-firewall-fields/), specifically the `sip` field, for more information on this topic.
+You can use the `sip` field when creating a rule to determine if packets are valid SIP Layer 7 (L7) protocol. Refer to [Magic Firewall fields](/cloudflare-one/reusable-components/packet-filtering-fields/), specifically the `sip` field, for more information on this topic.
 
 Contact your account manager if you need Magic Firewall to support additional protocols.