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2017-04-11 12:16:59 -0500 asked a question iptables TRACE and journalctl


I am trying to debug iptables firewall rules on Fedora 25 cloud edition.

Latest fedoras come with journalctl as opposed to the more traditional rsyslogd.

I have added the rule to trace packets:

iptables -t raw -A OUTPUT -p tcp --dport 80 -j TRACE

I have also see:

*cat /proc/net/netfilter/nflog
*2 nfnetlink
log (nflogipv4,nfnetlink_log)

Relevant kernel modules seem to be loaded: nfnetlinklog, nflogipv4, nflog_common

I can also see that kernel packages are been logged via journalctl -k -f

Yet there is no way to get the packet traces.

any idea what I could be missing?

2017-04-11 00:51:14 -0500 commented answer Fedora 25 (cloud ed) and Kernel Parameters

Thanks, I can change parameters of the currently configured kernel with gubby --extlinux --args=... --updae-kernel=all. The remaining question is what will happen once a new kernel is installed by the update subsystem. Will it also apply my configured arg?

2017-04-10 13:12:02 -0500 asked a question Fedora 25 (cloud ed) and Kernel Parameters


I am trying to migrate from Ubuntu to Fedora, so I am not fully familiar with fedora specifics yet.

I am trying to setup a kernel parameter at boot time.

I am looking for a "default" or equivalent file, so that the setting persists after kernel updates, etc.

My expectation is that I will add a default setting, and run a script that will update the boot sector/files.

Googling around I can find references to Grub2 and the /etc/default/grub file.

However, I dont think my system comes with Grub/2 at all, but rather extlinux.

I can find the extlinux configuration files, but I have no idea how was generated or where the settings come from.

How is this done with Fedora?