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advanced-firewall [2023/05/28 03:47] – [The Firewall page allows you to configure options to protect/facilitate certain network communications.] -change back to body text hogwild | advanced-firewall [2023/05/28 05:05] – [Multicast] -clarity of IGMP Snooping and Force IGMPv2 details hogwild | ||
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====== Firewall ====== | ====== Firewall ====== | ||
- | The Firewall page allows you to configure options to protect/facilitate | + | The Firewall page allows you to configure options to protect |
===== Firewall ===== | ===== Firewall ===== | ||
- | {{: | + | {{: |
- | **Limit communication | + | |
- | | + | **Limit communication to: **This specifies the maximum number of requests per second to which the Firewall will reply. Setting a limit number is recommended to prevent DDoS attacks.\\ \\ \\ {{: |
+ | |||
+ | \\ | ||
+ | |||
+ | **Enable TCP SYN cookies: | ||
**Enable DCSP Fix: **Checking this enables a workaround for packet marking, a well-known issue related to DSCP when connected to Comcast. | **Enable DCSP Fix: **Checking this enables a workaround for packet marking, a well-known issue related to DSCP when connected to Comcast. | ||
- | **Allow DHCP Spoofing:** | + | **Allow DHCP Spoofing: ** |
+ | |||
+ | **Smart MTU black hole detection:** | ||
- | IPv6 IPSec Passthrough - Enabling this allow IPSec tunnels to pass through the firewall. It opens port 500 and the " | ||
===== NAT ===== | ===== NAT ===== | ||
- | NAT loopback | + | **NAT loopback:** This technique allows LAN devices to access |
* All | * All | ||
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* Disabled | * Disabled | ||
- | **NAT target** - Defines | + | \\ |
+ | |||
+ | {{:: | ||
+ | |||
+ | **NAT target** - This defines | ||
\\ | \\ | ||
- | \\ {{: | ||
- | **Enable IGMP proxy** - Runs the IGMP (Internet Group Management Protocol) service on the router. | + | ===== Multicast ===== |
- | **LAN0/ | + | \\ \\ {{: |
- | **Enable | + | **Enable |
- | **Custom Configuration** - This option allows you to set up advanced parameters for the IGMP proxy daemon. | + | LAN0 - LAN3 Specifies which bridges will participate in IGMP, with the router acting as a proxy between selected LANs. This allows IGMP to work between VLANs. |
+ | |||
+ | * LAN0 - Checking this means the LAN0 bridge will participate in IGMP proxy. | ||
+ | * LAN1 - Checking this means the LAN1 bridge will participate in IGMP proxy. | ||
+ | * LAN2 - Checking this means the LAN2 bridge will participate in IGMP proxy. | ||
+ | * LAN3 - Checking this means the LAN3 bridge will participate in IGMP proxy. | ||
+ | |||
+ | \\ | ||
+ | |||
+ | **Enable quick leave** - This is a feature of IGMP v2 and later. Enabling this allows the router to stop streaming multicast to an IP address as soon as that device sends a "quick leave" IGMP packet. | ||
+ | |||
+ | **Custom Configuration** - This option allows you to set advanced parameters for the IGMP proxy daemon. | ||
\\ {{: | \\ {{: | ||
- | **Enable Udpxy** - Like IGMP proxy, Udpxy allows multicast communications between | + | **Enable Udpxy** - Like IGMP proxy, Udpxy allows multicast communications between |
+ | |||
+ | **Upstream interface** - Here, enter the stream source is expected to live. (Default: blank). | ||
+ | |||
+ | **LAN0/ | ||
+ | |||
+ | **Enable client statistics** - Enabling this causes FreshTomato to collect statistics about Udpxy clients. | ||
- | **Upstream interface** - Defines where the stream source | + | **Max clients - ** This represents |
- | **LAN0/ | + | **Udpxy port**- This specifies |
- | **Enable client statistics** - Enabling this causes FreshTomato to collect statistical information about Udpxy clients. | + | **Efficient Multicast Forwarding (IGMP Snooping) -** IGMP snooping makes the router' |
- | **Max clients -** Considering this is a lightwave protocol it works well for a limited number of clients, you might want to impose | + | However, caution |
- | **Udpxy port**- This is where you can consult the Udpxy information | + | Enabling IGMP snooping |
- | **Efficient Multicast Forwarding (IGMP Snooping) -** IGMP snooping is a way to have the switch (part of the router) facilitating the discovery of multicast (IGMP) clients. The idea is to only multicast traffic towards ethernet ports where there' | + | A common symptom |
- | **Force IGMPv2** - IGMPv2 enhances | + | **Force IGMPv2** - IGMPv2 enhances IGMP with additional messages/ |