Re: nftables: Clamping mss size to lower mtu (on PPPoE connection does not work)

2024-01-18 Thread Tixy
On Thu, 2024-01-18 at 14:16 +0100, Ralph Aichinger wrote: > On Thu, 2024-01-18 at 12:51 +, Tixy wrote: > > > > I have the same options in the forward chain except that I haven't > > qualified them with an interface name. Didn't occur to me that I > > would > > need to do that as there are

Re: nftables: Clamping mss size to lower mtu (on PPPoE connection does not work)

2024-01-18 Thread Ralph Aichinger
On Thu, 2024-01-18 at 12:51 +, Tixy wrote: > > I have the same options in the forward chain except that I haven't > qualified them with an interface name. Didn't occur to me that I > would > need to do that as there are only two networks my LAN and 'the > internet'. You probably don't need

Re: nftables: Clamping mss size to lower mtu (on PPPoE connection does not work)

2024-01-18 Thread Tixy
On Thu, 2024-01-18 at 12:31 +0100, Ralph Aichinger wrote: [...] > So it seems clamping the mss on the NAT/PPPoE-Machine running Debian no > longer works. For this I use/used the follwing rules: > > iifname "ppp0" tcp flags syn tcp option maxseg size set rt mtu; > oifname "ppp0" tcp flags syn tcp

nftables: Clamping mss size to lower mtu (on PPPoE connection does not work)

2024-01-18 Thread Ralph Aichinger
Hello everybody, related question to what I asked a few days ago: Since I touched my /etc/nftables.conf rules a few days ago to enable IPv6 I've got IPv6 working completely (thanks again for your help with suggesting logging packets), but I seemingly broke mss clamping for IPv4 in doing so (or