# Known technical impact *** The following traffic types can be rate limited: * TCP traffic(Applies only if there is a TCP attack ongoing) * UDP traffic(Applies only if there is an UDP attack ongoing) * DNS Traffic(DNS is limited to the common resolvers: 1.1.1.1,1.0.0.1, 8.8.8.8,8.8.4.4,9.9.9.9) * TCP traffic forces an authentication, which leads to the first connection being reset. * ICMP Traffic will be ratelimited or blocked under attack. * By default, we have a destination limit for all UDP ports that are not protected by the specific filters. Permanent protection can lead to the first connection attempt being reset. This usually results in the client retrying the connection, after which the TCP handshake is completed.\ \ Note: Cloudflare or other CDNs may not work due to the TCP reset once mitigation is active. Do not open any tickets about issues with Cloudflare or other CDN services. If you encounter any other impact, please contact our customer support. Due to extensive logging and flow collection, we are mostly able to track down any reported anomaly. If you have problems with the destination limit, please open a ticket.\ \ Other Protocols then TCP / UDP and ICMP can be ratelimited or blocked. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.packets-decreaser.net/ddos-protection/layer-4/known-technical-impact.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.