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Special Forums IP Networking Wrapper functions like SuSEFirewall2 Post 302931799 by Lost in Cyberia on Thursday 15th of January 2015 02:07:37 PM
Old 01-15-2015
Wrapper functions like SuSEFirewall2

Hey everyone, I have a question. I'm administering a linux machine that runs openSuSE. A few of the functions that I'd normally do manually, have programs that take over the task. For example, I wanted to add a few rules to my iptables. I then found out that there is an openSuse tool (SuSEfirewall2). Another exists for DNS configuration. Is using these tools mandatory?

I tried making the iptables changes the normal way by editing the file, but it didn't seem to work. Once I did the same changes with SuSEFirewall2, it seemed to work. I'm not sure if me using the suse firewall is what helped though.

So my question is, in linux in general, when there is a 'wrapper' tool like these, that edit the files for us, are we obligated to use them or can we by pass the function and do it manually?

Did the act of me using the openSusefirewall2 tool cause it to add something that I couldn't have by manually editing the iptables file?
 

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CTRLALTDEL(8)						       System Administration						     CTRLALTDEL(8)

NAME
ctrlaltdel - set the function of the Ctrl-Alt-Del combination SYNOPSIS
ctrlaltdel hard|soft DESCRIPTION
Based on examination of the linux/kernel/sys.c code, it is clear that there are two supported functions that the Ctrl-Alt-Del sequence can perform: a hard reset, which immediately reboots the computer without calling sync(2) and without any other preparation; and a soft reset, which sends the SIGINT (interrupt) signal to the init process (this is always the process with PID 1). If this option is used, the init(8) program must support this feature. Since there are now several init(8) programs in the Linux community, please consult the documentation for the version that you are currently using. ctrlaltdel is usually used in the /etc/rc.local file. FILES
/etc/rc.local SEE ALSO
simpleinit(8), init(8) AUTHOR
Peter Orbaek (poe@daimi.aau.dk) AVAILABILITY
The ctrlaltdel command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/. util-linux October 1993 CTRLALTDEL(8)
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