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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
firewall-applet
FIREWALL-APPLET(1) firewall-applet FIREWALL-APPLET(1) NAME
firewall-applet - firewalld applet SYNOPSIS
firewall-applet [OPTIONS...] DESCRIPTION
firewall-applet is a tray applet for firewalld. OPTIONS
firewall-applet does not support any special options. The only options that can be used are the general options that Gtk uses for Gtk application initialization. For more information on these options, please have a look at the runtime documentation for Gtk. The following options are supported: -h, --help Prints a short help text and exists. GSETTINGS
firewall-applet has additional settings to adapt the look and feel. The used backend depends on the distribution and can be either dconf or GConf. The path to the settings is org.fedoraproject.FirewallApplet. You can use dconf-editor or gconf-editor to see and modify them. The following settings are supported: notifications The applet shows notifications if enabled. This setting can be enabled also in the applet with the "Enable Notifications" checkbox in the right mouse menu. This setting defaults to false. If notifications are shown for these actions if enabled: o Connection to firewalld established o Connection to firewalld lost o Firewall has been reloaded o Default zone has been changed o Panic mode has been enabled or disabled o Activation, deactivation or change of zones bound to interfaces o Activation, deactivation or change of zones bound to sources addresses show-inactive Show applet also if firewalld is not running. If firewalld has been stopped or is not running the applet will be hidden and not visible in the applet tray. Enable this setting to see the applet all the time for example to be sure that the firewall is active. This setting defaults to false. shields-up The shields-up zone name to be used if shields-up is enabled. This setting defaults to 'block'. shields-down The shields-down zone name to be used if shields-up has been deactivated again. This setting defaults to 'public'. blink If enabled, the applet icon blinks in these cases: o Connection to firewalld lost o Panic mode has been enabled or disabled This setting defaults to false. blink-count The number of blinks if blink is enabled. This setting defaults to 5. 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 FIREWALL-APPLET(1)