netfilter-persistent seems ok but does not load rules after reboot

Samuel

6/20/23, 10:35 AM

Other people have similar issues but I tried all their approaches with missing iptable entries on boot, no success so far :| (it appears not to be a typo in the iptable files during load)

I've added a simple rule to iptables

sudo iptables -I INPUT -p tcp -m tcp --dport 8140 -j ACCEPT

and executed sudo service netfilter-persistent save

I've checked that the 8140 rule is in the iptables rules with sudo cat /etc/iptables/rules.v4

After rebooting however sudo iptables -L INPUT -v -n does not show my 8140 INPUT entry.

systemctl status netfilter-persistent says all ok

samuel@samuel-VirtualBox:~$ systemctl status netfilter-persistent
* netfilter-persistent.service - netfilter persistent configuration
     Loaded: loaded (/lib/systemd/system/netfilter-persistent.service; enabled; vendor preset: enabled)
    Drop-In: /etc/systemd/system/netfilter-persistent.service.d
             `-iptables.conf
     Active: active (exited) since Sun 2022-02-20 11:21:47 CET; 10min ago
       Docs: man:netfilter-persistent(8)
    Process: 642 ExecStart=/usr/sbin/netfilter-persistent start (code=exited, status=0/SUCCESS)
   Main PID: 642 (code=exited, status=0/SUCCESS)

Feb 20 11:21:47 samuel-VirtualBox systemd[1]: Starting netfilter persistent configuration...
Feb 20 11:21:47 samuel-VirtualBox netfilter-persistent[649]: run-parts: executing /usr/share/netfilter-persistent/plugins.d/15-ip4tables start
Feb 20 11:21:47 samuel-VirtualBox netfilter-persistent[649]: run-parts: executing /usr/share/netfilter-persistent/plugins.d/25-ip6tables start
Feb 20 11:21:47 samuel-VirtualBox systemd[1]: Finished netfilter persistent configuration.

So the service is enabled, when I manually run sudo service netfilter-persistent reload it seems to load the rules properly, because the 8140 INPUT chain is then shown.

Any hints on what to do would be welcome :)

0 + 0

iptables

networking

20.04

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: netfilter-persistent seems ok but does not load rules after reboot

TH: netfilter-persistent ดูเหมือนจะใช้ได้ แต่ไม่โหลดกฎหลังจากรีบูต

RO: netfilter-persistent pare ok, dar nu încarcă regulile după repornire

RU: netfilter-persistent кажется нормальным, но не загружает правила после перезагрузки

VI: netfilter-persistent có vẻ ổn nhưng không tải quy tắc sau khi khởi động lại

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