As a follow up, wireguard-tools v1.0.20200102 also has the issue.

I did think of updating nftables to the latest, but that then started 
dragging in too many other updated dependencies I wasn't comfortable 
with.  So, as nftables currently isn't used on Slack, I renamed the 
binary so that wg-quick wouldn't find it, which allowed the connection 
to be made.

Now all I need do is work out why the handshakes between client and 
server are working, but traffic doesn't flow.

Cheers.


On 1/2/2020 12:04 AM, Eddie wrote:
> Not sure if this helps, or not.  But this is the relevant part from a 
> bash trace:
>
> + cmd nft -f /dev/fd/63
> + echo '[#] nft -f /dev/fd/63'
> [#] nft -f /dev/fd/63
> + nft -f /dev/fd/63
> ++ echo -n 'add table ip wg-quick-wg0
> add chain ip wg-quick-wg0 preraw { type filter hook prerouting 
> priority -300; }
> add chain ip wg-quick-wg0 premangle { type filter hook prerouting 
> priority -150; }
> add chain ip wg-quick-wg0 postmangle { type filter hook postrouting 
> priority -150; }
> add rule ip wg-quick-wg0 preraw iifname != wg0 ip daddr 192.168.150.14 
> fib saddr type != local drop
> add rule ip wg-quick-wg0 postmangle meta l4proto udp mark 51820 ct 
> mark set mark
> add rule ip wg-quick-wg0 premangle meta l4proto udp meta mark set ct mark
> '
> /dev/fd/63:5:76-80: Error: syntax error, unexpected saddr
>
> ^^^^^
> Cheers.
>
>
> On 1/1/2020 11:34 PM, Eddie wrote:
>> Ha.  Even older:
>>
>> root@The-Tardis:~# nft -v
>> nftables v0.6 (Support Edward Snowden)
>>
>>
>> And in reply to a couple of off-list messages:
>>
>> wireguard-tools-1.0.20191226
>>
>> There are different reasons for using different VPNs.  Can you really 
>> "totally" trust the one that you're using.
>>
>> Cheers.
>>
>>
>>
>> On 1/1/2020 10:22 PM, Edward Vielmetti wrote:
>>> Eddie - what version of nftables does Slackware come with? The 
>>> output of `nft -v` should be helpful.
>>>
>>> There is a report from stackexchange that nftables at 0.7 gives this 
>>> error, but at 0.8.1 or better it's OK. I was not easily able to 
>>> verify that from the source code, but it would be where I'd start to 
>>> look. There was
>>>
>>> The nftables 0.8.1 release notes (from 2018) are here: 
>>> https://lwn.net/Articles/744480/ and it points to new syntax in this 
>>> release.
>>>
>>> good luck!
>>>
>>> Ed
>>>
>>> On Thu, Jan 2, 2020 at 12:27 AM Eddie <stunnel@attglobal.net 
>>> <mailto:stunnel@attglobal.net>> wrote:
>>>
>>>     First time running wireguard as a native client on my Slackware
>>>     14.2
>>>     system throws this:
>>>
>>>     root@The-Tardis:~# wg-quick up wg0
>>>     [#] ip link add wg0 type wireguard
>>>     [#] wg setconf wg0 /dev/fd/63
>>>     [#] ip -4 address add 192.168.150.14/32
>>>     <http://192.168.150.14/32> dev wg0
>>>     [#] ip link set mtu 1420 up dev wg0
>>>     [#] wg set wg0 fwmark 51820
>>>     [#] ip -4 route add 0.0.0.0/0 <http://0.0.0.0/0> dev wg0 table 51820
>>>     [#] ip -4 rule add not fwmark 51820 table 51820
>>>     [#] ip -4 rule add table main suppress_prefixlength 0
>>>     [#] sysctl -q net.ipv4.conf.all.src_valid_mark=1
>>>     [#] nft -f /dev/fd/63
>>>     /dev/fd/63:5:76-80: Error: syntax error, unexpected saddr
>>>
>>>     Fairly simple config to connect to my VPS:
>>>
>>>     [Interface]
>>>     Address = 192.168.150.14/32 <http://192.168.150.14/32>
>>>     PrivateKey = <Not the key you're looking for>
>>>
>>>     [Peer]
>>>     PublicKey = <Just being overly paranoid>
>>>     Endpoint = www.xxx.yyy.zzz:51820
>>>     AllowedIPs = 0.0.0.0/0 <http://0.0.0.0/0>
>>>
>>>     Not sure what additional information you need collected at this
>>>     point.
>>>
>>>     I'm able to connect outbound successfully using NordVPN's
>>>     version of
>>>     wireguard, but that doesn't use wg-quick, which is where the
>>>     issue is.
>>>
>>>     Cheers.
>>>     _______________________________________________
>>>     WireGuard mailing list
>>>     WireGuard@lists.zx2c4.com <mailto:WireGuard@lists.zx2c4.com>
>>>     https://lists.zx2c4.com/mailman/listinfo/wireguard
>>>
>>>
>>>
>>> -- 
>>> Edward Vielmetti +1 734 330 2465
>>> edward.vielmetti@gmail.com <mailto:edward.vielmetti@gmail.com>
>>>
>>
>>
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