On 05/07/2019 23:48, ѽ҉ᶬḳ℠ wrote: > kernel 4.14.131 with installed modules: > nftables, kmod-nft-arp, kmod-nft-bridge, kmod-nft-core, kmod-nft-fib, > kmod-nft-nat, kmod-nft-nat6, kmod-nft-netdev, kmod-nft-offload, libnftnl > > not installed: libxtables-nft, nft-qos > __________ > > > table ip filter { > chain input { > type filter hook input priority 0; > } > chain forward { > type filter hook forward priority 0; > } > chain output { > type filter hook output priority 0; > } > } > ____________ > > Either > > # nft add rule ip filter forward oifname pppoe-wan tcp flags syn tcp > option maxseg size set rt mtu > # nft add rule ip filter forward oifname ppp0 tcp flags syn tcp option > maxseg size set 1452 > > is producing > Error: Could not process rule: No such file or directory > > > What is missing or what I am missing? > Could not find something in the online documentation but suspect that the kernel CONFIG_NFT_RT has a role in this? At the moment it is not set and I cannot change it.