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advanced-firewall [2023/05/28 04:05] – [NAT] -condense hogwild | advanced-firewall [2023/05/28 05:05] – [Multicast] -clarity of IGMP Snooping and Force IGMPv2 details hogwild | ||
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===== 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. | ||
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* Disabled | * Disabled | ||
- | \\ | + | \\ |
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+ | {{:: | ||
**NAT target** - This defines the way NAT is implemented for use during loopback. Masquerade is the default, but involves an additional lookup. ad the mapping of done towards an interface. SNAT is minutely faster, as the NAT mapping points directly to the destination IP and so it bypasses the lookup stage. However, SNAT is less reliable than Masquerade. | **NAT target** - This defines the way NAT is implemented for use during loopback. Masquerade is the default, but involves an additional lookup. ad the mapping of done towards an interface. SNAT is minutely faster, as the NAT mapping points directly to the destination IP and so it bypasses the lookup stage. However, SNAT is less reliable than Masquerade. | ||
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**Enable IGMP proxy** - Checking this enables the IGMP (Internet Group Management Protocol) service. | **Enable IGMP proxy** - Checking this enables the IGMP (Internet Group Management Protocol) service. | ||
- | LAN0 - LAN3 Specifies which bridges will be participate in IGMP using the router as a proxy between | + | LAN0 - LAN3 Specifies which bridges will participate in IGMP, with the router |
- | * LAN0 - Checking this specifies | + | * LAN0 - Checking this means the LAN0 bridge will participate in IGMP proxy. |
- | * LAN1 - Checking this specifies | + | * LAN1 - Checking this means the LAN1 bridge will participate in IGMP proxy. |
- | * LAN2 - Checking this specifies | + | * LAN2 - Checking this means the LAN2 bridge will participate in IGMP proxy. |
- | * LAN3 - Checking this specifies | + | * LAN3 - Checking this means the LAN3 bridge will participate in IGMP proxy. |
\\ | \\ | ||
- | **Enable quick leave** - This is a feature of IGMP v2. This allows the router to stop the streaming | + | **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" |
- | **Custom Configuration** - This option allows you to set up advanced parameters for the IGMP proxy daemon. | + | **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/ |