![]() ![]() ![]() Then I run make defconfig - hoping the above changes took place, alas - they do not. # Add 'firewall4' and all of the dependencies So naturally my first instinct was to modify the default configuration for my target with something like this: # Remove kmod-ipt-nat conflict and set 'firewall3' to "N" This section discusses the relationships. Firewall rules add another layer of granularity to what is allowed to be forwarded across interfaces - and additionally which packets are allowed to be inputted to, and outputted from, the router itself. ![]() In here I see the following package info: define Package/firewall4ĭEPENDS:=+ucode +ucode-mod-fs +ucode-mod-uci +ucode-mod-ubus +kmod-nft-core +kmod-nft-fib +kmod-nft-nat +kmod-nft-nat6 +nftables-json Firewall and network interfaces The goal of a router is to forward packet streams from incoming network interfaces to outgoing network interfaces. Except for a few specific models installing OpenWRT will greatly reduce your performance. Also OpenWRT does not run well on most modern routers. I honestly don't have a device in default configuration to check for you. As already pointed out any firewall already does what you want. See: To get your answer, simply backup the config, erase the router and see the setting. I am trying to build a new image (from source, master branch) with firewall4 included. I have a working Seagate DockStar unit running on a self-built OpenWRT + FreeSWITCH firmware and is connected to my NAT/Firewall router. Most consumers don't use 2 routers in the same firewall zone (unless one is doing NAT). Hi all - would anyone mind helping a fellow newby with trying out the new firewall4 package? Description Setup ZeroTier on router Installation SSH to the router, and execute the following commands to install ZeroTier package: 1 2 opkg update opkg install zerotier Configuration ZeroTier You should edit the configuration file /etc/config/zerotier to enable ZeroTier and join into a network. I had some stability issues with my custom compile, so I reverted back to 21.02.1, but I've been waiting to see how nftables will look out-of-the-box when firewall4 takes over. Ip saddr tcp flags syn tcp option maxseg size set rt mtu comment "!fw4: Zone wan IPv4/IPv6 egress MTU fixing" # Drop RFC2827 - IETF BCP38 / Bogons / Martian Packets Tcp flags syn tcp option maxseg size 1-535 counter drop Tcp flags & (fin|syn|rst|psh|ack|urg) = 0x0 counter drop Tcp flags & (fin|syn|rst|psh|ack|urg) = fin|syn|rst|psh|ack|urg counter drop In the spirit of sharing, I'll drop a little snippet here that others might find beneficial to include on their WAN ingress. Basically, this is for sharing and caring! If you have a neat NFtables tip or trick that you think might benefit others, share a snippet here for the good of the community. Hopefully this topic can help those getting their feet wet with NFtables, and maybe even help some of the seasoned NFtables veterans out there. ![]()
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