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Shell Programming and Scripting
need help writing a script
Post 35376 by tarballed on Wednesday 9th of April 2003 06:28:51 PM
04-09-2003
need help writing a script
Hello everyone. Well, I will get right to the point. I am new to Perl and trying to learn it as much as I can. I have been assigned the task of writing a perl script to extract information from firewall logs.
Like I said, I am new to Perl and I am having a tough time because I think what I am trying to do is very advanced.
Here is what I want to do:I am trying to extract information from a firewall log and put it into a new file. I only want to extract certain pieces of information. Here are a few examples:
Let me show what I am trying to pull out of the file:
03/13/03 16:44:56 kernel Temporarily blocking host 212.241.116.21
(This is where the inital block occurs, the firewall will then continue to block all attempts from this IP address.I would like to extract all entries in the firewall like this one.)
03/13/03 16:44:57 firewalld103 deny in eth0 48 tcp 20 117 212.241.11.21 209.126.xxx.xxx 4449 80 syn (LO-Proxied-HTTP)
(At this point, the firewall continues to block the attempt. I would like to extract all lines in the firewall that contain this as well...contains very useful information such as ports and packet sizes.)
With that in mind, can I ask for someone to help me build my script? I feel like I am butting my head against a wall. I know I have much to learn, but can learn a lot from seeing the script and breaking it down to see how it functions.
I really need help. If someone can help me write this script, I would be extremely grateful. I should mention, this is not a homework assignment.
Also, once I see the script and how it is written, I believe it will help me understand much more.
Thanks.
Tarballed
Like I said, I am new to Perl and I am having a tough time because I think what I am trying to do is very advanced.
Here is what I want to do:I am trying to extract information from a firewall log and put it into a new file. I only want to extract certain pieces of information. Here are a few examples:
Let me show what I am trying to pull out of the file:
03/13/03 16:44:56 kernel Temporarily blocking host 212.241.116.21
(This is where the inital block occurs, the firewall will then continue to block all attempts from this IP address.I would like to extract all entries in the firewall like this one.)
03/13/03 16:44:57 firewalld103 deny in eth0 48 tcp 20 117 212.241.11.21 209.126.xxx.xxx 4449 80 syn (LO-Proxied-HTTP)
(At this point, the firewall continues to block the attempt. I would like to extract all lines in the firewall that contain this as well...contains very useful information such as ports and packet sizes.)
With that in mind, can I ask for someone to help me build my script? I feel like I am butting my head against a wall. I know I have much to learn, but can learn a lot from seeing the script and breaking it down to see how it functions.
I really need help. If someone can help me write this script, I would be extremely grateful. I should mention, this is not a homework assignment.
Also, once I see the script and how it is written, I believe it will help me understand much more.
Thanks.
Tarballed
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LEARN ABOUT CENTOS
firewalld.conf
FIREWALLD.CONF(5) firewalld.conf FIREWALLD.CONF(5) NAME
firewalld.conf - firewalld configuration file SYNOPSIS
/etc/firewalld/firewalld.conf DESCRIPTION
firewalld.conf is loaded by firewalld during the initialization process. The file contains the basic configuration options for firewalld. OPTIONS
These are the options that can be set in the config file: DefaultZone This sets the default zone for connections or interfaces if the zone is not selected or specified by NetworkManager, initscripts or command line tool. The default zone is public. MinimalMark For some firewall settings several rules are needed in different tables to be able to handle packets in the correct way. To achieve that these packets are marked using the MARK target iptables(8) and ip6tables(8). With the MinimalMark option a block of marks can be reserved for private use; only marks over this value are used. The default MinimalMark value is 100. CleanupOnExit If firewalld stops, it cleans up all firewall rules. Setting this option to no or false leaves the current firewall rules untouched. The default value is yes or true. Lockdown If this option is enabled, firewall changes with the D-Bus interface will be limited to applications that are listed in the lockdown whitelist (see firewalld.lockdownwhitelist(5)). The default value is no or false. SEE ALSO
firewall-applet(1), firewalld(1), firewall-cmd(1), firewall-config(1), firewalld.conf(5), firewalld.direct(5), firewalld.icmptype(5), firewalld.lockdown-whitelist(5), firewall-offline-cmd(1), firewalld.richlanguage(5), firewalld.service(5), firewalld.zone(5), firewalld.zones(5) NOTES
firewalld home page at fedorahosted.org: http://fedorahosted.org/firewalld/ More documentation with examples: http://fedoraproject.org/wiki/FirewallD AUTHORS
Thomas Woerner <twoerner@redhat.com> Developer Jiri Popelka <jpopelka@redhat.com> Developer firewalld 0.3.9 FIREWALLD.CONF(5)