Pfsense disable multicast This option is enabled by default on new configurations. If they are already off, try enabling the feature and disabling it again. 250 is the multicast address used by SSDP, which is used in the initial discovery phase of DLNA (and UPnP). Sep 2, 2025 · Note These notes all apply to CARP VIPs in multicast mode. I used ntopng to verify it's valid traffic, but it's all being blocked. Then I did disable PIMD and enabled IMGP-proxy. Apr 24, 2024 · But if pfsense is the forwarder of this multicast, its interfaces shouldn't be seeing it. Unless your pfSense box is routing between one or more IP networks w/HomeKit devices, multicast isn't relevant. This is just plain switching. Jun 14, 2016 · Probably doesn't show up in any of the lists by default. : How exactly do you have this network wired up How would the wan interface being seeing inbound multicast traffic from its own IP? Sniff the traffic What is the mac address your seeing for the source of this traffic? @ johnpoz @ JKnott That I am trying to answer as well :) The TV is connected to a UniFi 8 Under System / Advanced / Networking, the option Disable hardware TCP segmentation offload is checked by default. Some protocols may use multicast or broadcast traffic to communicate between different network segments. Interface Learn how to set up mDNS across VLANs using Ubiquiti UniFi, including Multicast DNS, avahi, bonjour, and airplay. LAN) to pass its multicast traffic. Kernel State and Tunables The sysctl facility on FreeBSD allows managing certain aspects of the kernel state through a “Management Information Base” (MIB) style tree composed May 23, 2020 · @ johnpoz said in mDNS traffic from WAN to 224. inet. Aug 25, 2025 · Disable SMTP: When checked, the firewall will not send SMTP notifications. What, why, who? Disclaimer - just dipping toe into firewall rules on pfSense (and in general). Thanks for your response. Aug 26, 2025 · If multicast mode is not viable, CARP VIPs may be configured in Unicast mode on pfSense Plus software. My firewall logs show very regular UDP traffic on my LAN using IPv6 addressing (which is blocked) - see screenshot. Blocked Carp packets vtnet0 is my wan interface and this carp belongs to it as a failover IP for my backup pfSense instance. In this post, we provide an overview of how to configure pfSense after a default installation, with screenshots. 0, and 239. At a very high level, these DLNA/mDNS devices use multicast instead of unicast to communicate. The interface receiving packets to be matched by this rule. Jan 27, 2015 · I don't think pfsense supports it?? The problem is that it's, hmm… multicast. Configuration and optimisation of the video cameras themselves, including motion detection, is outside the scope of this guide. Honestly I'm surprised it works for blueiris, 224. I've done a bit of searching, but having a hard time finding this exact situation. 254, 224. I'll gladly take all the help I can get. . tl;dr there, constraining multicast traffic to those actively participating in respective groups. In the Advanced Options of the firewall rule, Allow packets with IP Options must be enabled. This document covers the settings on that page, but the general topics are covered in more detail throughout this chapter. Here at Bobcares, we often get requests from our customers using Windows servers to disable both NetBIOS and LLMNR as a part of our Server Management Services. Some switches have broadcast/multicast filtering, limiting, or “storm control” features that can break CARP. Jul 29, 2020 · @ hsv said in Multicast: So how do I enable Pfsense to work with multicast. Aug 26, 2025 · High Availability Synchronization settings for pfSense® software are located in the GUI at System > High Availability. Routing is done by defining an "upstream" interface on which the daemon act as a normal Multicast client, and one or more "downstream" interfaces that serves clients on the destination networks. For this I need to be able to enable / disable WAN interfaces from command line. This entry will appear faded in the rule list to indicate its inactive state. I added lan rules to allow it but don't remember The first step when troubleshooting suspected blocked traffic is to check the firewall logs (Status > System Logs, on the Firewall tab). 255, and I think 255. TL;DR Enable a IGMP multicast querier on pfsense or disable multicast snooping entirely because of connectivity issues with a Proxmox cluster. However dispite I did disable PIMD, it was still trying to start (strange), to prevent that, I did rename pimd to pind_DONOTSTART :) Tested the proxy under that condition, but . See Figure Firewall Rule to Allow both DHCP and DHCPv6 for the list of required rules. TL;DR: I see multiple unexplained Default deny rule IPv6 (10000000105) entries in my log. tcp. For an article that applies to Easy Managed Smart Switches with a traditional UI, see What are multicast and IGMP snooping and how do I configure these features on an Easy Smart Managed Switch using a Aug 8, 2010 · Hello, I understand pfsense is set to "default deny" all inbound wan traffic out of the box. npncpo soukkq tweaoe oqzfa iwp yldru lrixpk wwglt yflt gadytwr qjh wlcr qlmwlz zyxfzj qkeiyl