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advanced-firewall [2022/01/21 02:49] – old revision restored (2022/01/21 02:45) hogwild | advanced-firewall [2023/05/28 05:05] – [Multicast] -clarity of IGMP Snooping and Force IGMPv2 details hogwild | ||
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+ | ====== Firewall ====== | ||
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+ | The Firewall page allows you to configure options to protect or facilitate various types of network communications. | ||
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===== Firewall ===== | ===== Firewall ===== | ||
- | The Firewall page allows you to configure options to protect/ | + | {{: |
- | {{: | + | \\ **WAN interfaces respond to ping and traceroute: |
- | **Limit communication to **- Specifies | + | **Limit communication to: |
\\ | \\ | ||
- | {{:pasted: | + | **Enable TCP SYN cookies: |
- | **Enable | + | **Enable |
- | **Enable DCSP Fix** - This enables a workaround for a well-known issue related to DSCP (packet marking) when connected to the Comcast ISP. | + | **Allow DHCP Spoofing: |
- | **IPv6 IPSec Passthrough** - FIXME\\ \\ | + | **Smart MTU black hole detection:** |
- | \\ | ||
- | {{: | + | ===== NAT ===== |
- | **NAT loopback** | + | **NAT loopback:** This technique allows LAN devices to access |
* All | * All | ||
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* Disabled | * Disabled | ||
- | **NAT target** - Defines | + | \\ |
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+ | {{:: | ||
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+ | **NAT target** - This defines | ||
\\ | \\ | ||
- | Multicast\\ {{: | ||
- | **Enable IGMP proxy** - Runs the IGMP (Internet Group Management Protocol) | + | ===== Multicast ===== |
+ | |||
+ | \\ \\ {{: | ||
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+ | **Enable IGMP proxy** - Checking this enables | ||
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+ | LAN0 - LAN3 Specifies which bridges will participate | ||
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+ | | ||
+ | * LAN1 - Checking this means the LAN1 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. Consult official IGMP documentation before using this.\\ | ||
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+ | **Enable Udpxy** - Like IGMP proxy, Udpxy allows multicast communications between devices on different VLANs. Since their behavior is very similar, you are advised to use either Udpxy or IGMP proxy, but not both at once. | ||
+ | |||
+ | **Upstream interface** - Here, enter the stream source is expected to live. (Default: blank). | ||
- | **Enable Udpxy** - Like IGMP proxy, Udpxy allows multicast communications between senders and receivers in different VLANs. Since their behavior is almost identical, it is recommended you use either Udpxy or IGMP proxy, but not both at the same time. | + | **LAN0/ |
- | **Upstream interface** - Defines where the stream source is expected | + | **Enable client statistics** - Enabling this causes FreshTomato |
- | **LAN0/ | + | **Max clients - ** This represents |
- | **Enable client statistics** - Enabling this causes FreshTomato to collect statistical information about Udpxy clients. | + | **Udpxy port**- This specifies the port on which you can recive |
- | **Max clients | + | **Efficient Multicast Forwarding (IGMP Snooping) |
- | **Udpxy port**- This is where you can consult | + | However, caution is advised. Often, UPnP or DLNA is the only significant multicast application in use on a home network. Thus, multicast configuration issues or other deficiencies can appear as UPnP issues, but are actually underlying network issues. |
- | {{: | + | Enabling IGMP snooping on a wireless router' |
- | **Efficient Multicast Forwarding (IGMP Snooping) -** IGMP snooping | + | A common symptom of this is a network host (say, a Smart TV) which appears after it's powered on, but then " |
- | **Force IGMPv2** - IGMPv2 enhances | + | **Force IGMPv2** - IGMPv2 enhances IGMP with additional messages/ |