nf_conntrack: automatic helper assignment is deprecated...

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littlehuman
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nf_conntrack: automatic helper assignment is deprecated...

Post by littlehuman » Mon Feb 19, 2018 5:47 pm

Hello there,

Maybe not an issue but just want to know more about this.

I often see this in the syslog of my laptop :
Feb 19 22:00:57 spinoza kernel: [...] nf_conntrack: automatic helper assignment is deprecated
and it will be removed soon.Use the iptables CT target to attach helpers instead.


It has Linux Mint 18.3 Sylvia 64 bits installed, using kernel 4.4.0-112-generic
Nothing special at the network level, except that I use dnscrypt-proxy.
UFW is enabled too.
Wifi connection.

What does this entry mean, should I ignore it or is there something to fix ?
"Bruce Schneier taught Chuck Norris how to divide by zero as they stood silent in an elevator" - schneierfacts.com

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catweazel
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Re: nf_conntrack: automatic helper assignment is deprecated...

Post by catweazel » Tue Feb 20, 2018 12:50 am

Please post the output of this terminal command:

Code: Select all

inxi -Fxz
Enclose the results in code markers, which you can select from the mini toolbar above the textbox where you type your reply.
A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it. - Max Planck

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littlehuman
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Re: nf_conntrack: automatic helper assignment is deprecated...

Post by littlehuman » Tue Feb 20, 2018 8:36 pm

Here it is.

Code: Select all

System:    Host: spinoza Kernel: 4.4.0-112-generic x86_64 (64 bit gcc: 5.4.0)
           Desktop: Cinnamon 3.6.7 (Gtk 3.18.9-1ubuntu3.3) Distro: Linux Mint 18.3 Sylvia
(...)
Network:   Card-1: Intel Centrino Advanced-N 6235 driver: iwlwifi bus-ID: 03:00.0
           IF: wlp3s0 state: up mac: <filter>
           Card-2: Qualcomm Atheros AR8151 v2.0 Gigabit Ethernet
           driver: atl1c v: 1.0.1.1-NAPI port: d000 bus-ID: 04:00.0
           IF: enp4s0 state: down mac: <filter>
(...)
P.S. BIOS version is the latest for this model, selected microcode is intel-microcode 3.20180108.0+really20170707ubuntu16.04.1
Last edited by littlehuman on Mon Mar 05, 2018 9:46 pm, edited 1 time in total.
"Bruce Schneier taught Chuck Norris how to divide by zero as they stood silent in an elevator" - schneierfacts.com

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WharfRat
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Re: nf_conntrack: automatic helper assignment is deprecated...

Post by WharfRat » Tue Feb 20, 2018 11:53 pm

littlehuman,

That's just a netfilter connection tracking warning message that some rule is going to be eliminated and the CT target should be used instead.

Most likely it's come rule that's been set with UFW and it will require a modification.

In the man page
The CT target sets parameters for a packet or its associated connection. The target attaches a "template" connection tracking entry to the packet, which is then used by the conntrack core when initializing a new ct entry. This target is thus only valid in the "raw" table.
So basically it's out of your hands.

There's an informative read here http://home.regit.org/wp-content/upload ... lpers.html
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littlehuman
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Re: nf_conntrack: automatic helper assignment is deprecated...

Post by littlehuman » Wed Feb 21, 2018 12:59 pm

Thanks for the useful info
"Bruce Schneier taught Chuck Norris how to divide by zero as they stood silent in an elevator" - schneierfacts.com

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