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advanced-firewall [2023/05/28 04:11] – [NAT] -insert screenshot: "advaned-firewall-NAT.jpg" hogwild | advanced-firewall [2023/05/28 05:39] (current) – [Multicast] -condense, list/explain additional features of new IGMPv2 messages 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.\\ |
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+ | \\ | ||
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+ | **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. | ||
+ | |||
+ | **Max clients - ** This represents the maximum number of simultaneous Udpxy clients. Udpxy is is a lightweight protocol, and only works well for a limited number of clients. For this reason, you might want to impose a maximum limit. | ||
+ | |||
+ | **Udpxy port**- This specifies the port on which you can recive Udpxy information from your router.\\ | ||
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+ | **Efficient Multicast Forwarding (IGMP Snooping) -** IGMP snooping makes the router' | ||
- | **Upstream interface** - Defines where the stream source | + | However, caution |
- | **LAN0/LAN1/LAN2/LAN3** | + | A common symptom of this is a network host (say, a Smart TV) which appears after it's powered on, but then " |
- | **Enable client statistics** - Enabling this causes FreshTomato | + | **Force IGMPv2** - IGMPv2 enhances IGMP with additional messages/ |
- | **Max clients -** Considering this is a lightwave protocol it works well for a limited number | + | Other features |
- | **Udpxy port**- This is where you can consult | + | Group specific membership query. The router |
- | **Efficient Multicast Forwarding | + | MRT (Maximum Response Time) field. This new field in query messages specifies how much time hosts have to respond to the query. |
- | **Force IGMPv2** - IGMPv2 enhances the IGMP communication supporting additional messages/ | + | Querier election process. When two routers are connected |