From: Blaine Williams (williams.blaine@gmail.com)
Date: Sun Apr 29 2007 - 09:33:34 ART
Victor,
I know you already solved this. But as an alternative, you could set
up Dynamic DNS to update dyndns.org with your new IP address when it
changes. Then just use the DNS name. Here's the whitepaper on DDNS
support with DHCP in IOS:
Blaine Williams
On 4/10/06, Victor Cappuccio <cvictor@protokolgroup.com> wrote:
> Tim, Thank you very much, the script worked like it should..
>
>
> I just changed the language of the email and the email looks looks
> like this
>
> IPProxyLinux@protokolgroup.com escribis:
> > LA IP CAMBIO
> > Vieja: XX.XX.96.117
> > Nueva: XXX.XX.96.117
> Thanks again..
>
>
> Tim Fletcher escribis:
> > Victor,
> >
> > Here's a perl script I wrote that uses SNMP. The 1st time you run
> > it, it gets your IP address and stores it in a file. Each time you
> > run it after that, it checks the current IP against the cached one.
> > If it's different, it sends out an e-mail.
> >
> > You'll need 2 perl modules; Net::SNMP and Mail::Send. Try running
> > the script 1st. If it says it can't find one of these modules, you
> > can install them using cpan. Log in as root, and from the command
> > line enter "cpan". It may ask you a bunch of setup questions. Once
> > you get to the "cpan>" prompt, enter "install Net::SNMP". Once that
> > completes, do the same thing for Mail::Send, then enter "q" to
> > quit. Once you have the script working, put in /etc/cron.hourly.
> >
> > -Tim Fletcher
> >
> > #!/usr/bin/perl -w
> >
> > use strict;
> > use Net::SNMP;
> > use Mail::Send;
> >
> > # the IP address that you use to connect to your gateway
> > my $host = '<IPaddr>';
> >
> > # the name of your external interface such as "Ethernet0/0"
> > my $interface = 'PIX Firewall \'outside\' interface';
> >
> > # your SNMP community string
> > my $community = '<community>';
> >
> > # who the mail will be sent to
> > my $rcpt = '<recipient>';
> >
> > # the from address of the mail
> > my $mail = '<sender>';
> >
> > # a writable file to store the current IP address
> > my $cache_file = '/tmp/ext_ip_addr';
> >
> > my $ifDescr = '.1.3.6.1.2.1.2.2.1.2';
> > my $ipAdEntIfIndex = '.1.3.6.1.2.1.4.20.1.2.';
> >
> > my ($sess,
> > $err,
> > $fh,
> > $int_list,
> > $int_idx,
> > $msg,
> > $new_addr,
> > $old_addr,
> > %int_name,
> > %int_ip_addr,
> > );
> >
> > $\ = "\n";
> >
> > # read cach file it it exists
> > if (open (CF, $cache_file)) {
> > chomp ($old_addr = <CF>);
> > close CF;
> > }
> >
> > # open SNMP session
> > ($sess, $err) = Net::SNMP->session(Hostname => $host,
> > Community => $community);
> > die "session error: $err\n" unless defined $sess;
> >
> > # get the list of interfaces
> > $int_list = $sess->get_table(Baseoid => $ifDescr);
> > unless (defined $int_list) {
> > $err = $sess->error;
> > die "get_table error: $err\n";
> > }
> >
> > # find the interface index using the interface name
> > foreach (keys %$int_list) {
> > # get the last field of the OID
> > my $idx_num = (split (/\./, $_))[11];
> >
> > # $int_name{<index number>} = <interface name>
> > $int_name{$idx_num} = $int_list->{$_};
> >
> > $int_idx = $idx_num if $int_list->{$_} eq $interface;
> > }
> >
> > # make sure we matched the interface name
> > die "$0: could not find interface named: $interface" unless defined
> > $int_idx;
> >
> > # find the address using the interface index
> > $int_list = $sess->get_table(Baseoid => $ipAdEntIfIndex);
> >
> > unless (defined $int_list) {
> > $err = $sess->error;
> > die "get_table error: $err\n";
> > }
> >
> > # extract the ip address from the OID using the index
> > foreach (keys %$int_list) {
> > my $addr = join ('.', (split (/\./, $_))[11 .. 14]);
> > $int_ip_addr{$_} = $addr;
> > $new_addr = $addr if $int_list->{$_} eq $int_idx;
> > }
> >
> > $sess->close;
> >
> > # update cache file
> > open (CF, ">" . $cache_file)
> > || die "error opening $cache_file for writing: $?\n";
> > print CF $new_addr;
> > close CF || die "error closing $cache_file: $?\n";
> >
> > # if there was no previous cache file, exit now
> > exit unless defined $old_addr;
> >
> > # if the address hasn't changed, exit now
> > exit if ($old_addr eq $new_addr);
> >
> > # if we're runnning interactively, print results
> > if (-t STDOUT) {
> > print "Old address: $old_addr";
> > print "New address: $new_addr";
> > }
> >
> > # send e-mail
> > $msg = new Mail::Send;
> > $msg->to($rcpt);
> > $msg->add('From', $mail);
> > $msg->subject('IP address change');
> >
> > $fh = $msg->open;
> > print $fh "Public IP address has changed";
> > print $fh "Old address: $old_addr";
> > print $fh "New address: $new_addr";
> > $fh->close;
> >
> >
> > Victor Cappuccio wrote:
> >> Wayne, THANKS :D
> >> what Linux app could help me doing that??
> >>
> >>
> >> CCIE KH49279 escribis:
> >>> Victor,
> >>>
> >>> If you have a linux box on your internal network, you can have it
> >>> poll the
> >>> router and email the new IP when it changes. I am assuming you
> >>> are using
> >>> DHCP on the router. Perhaps you can setup logging??
> >>>
> >>> wayne
> >>> -----Original Message-----
> >>> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> >>> Behalf Of
> >>> Victor Cappuccio
> >>> Sent: Sunday, April 09, 2006 1:48 AM
> >>> To: Magmax
> >>> Cc: CCIE LAB
> >>> Subject: Re: a night with an IP
> >>>
> >>> Ubaid, I do not get your question...
> >>>
> >>> I'm located in Venezuela
> >>> But from the link you gave me, I'm located in this IP
> >>> Address :D :D :D :D
> >>>
> >>> You appear to be located in United States [City: Caracas, Distrito
> >>> Federal], based on your IP address of 1xx.2xx.63.3 (see our
> >>> geolocation
> >>> FAQ for details). FAQ, media information, linking, automated
> >>> usage and
> >>> more can be found at the FAQ page. Comments? Suggestions for new
> >>> features? Problems? Want DNS advice? Please use the DNSstuff.com
> >>> Forums.
> >>>
> >>> When did Venezuela became part of the US :D
> >>> That are good new, since I would not need a Visa to get in :D
> >>>
> >>> Now my question is, is there any Cisco Method to know what IP
> >>> Address my
> >>> TS has and send like an TRAP to an email?
> >>>
> >>> Magmax escribis:
> >>>
> >>> Can you tell me where are you and how are you sending this
> >>> email and where
> >>> is your rack?
> >>> Ubaid
> >>>
> >>> -----Original Message-----
> >>> From: nobody@groupstudy.com
> >>> [ mailto:nobody@groupstudy.com ] On
> >>> Behalf Of
> >>> Victor Cappuccio
> >>> Sent: Sunday, 9 April 2006 4:32 PM
> >>> To: Magmax
> >>> Cc: 'CCIE LAB'
> >>> Subject: Re: a night with an IP
> >>> Thanks Magmax, but I do not know my current RACK IP
> >>> Address... :(
> >>>
> >>> Magmax escribis:
> >>>
> >>> You can try using Mirc or visit this website to find your
> >>> current ip
> >>>
> >>> address
> >>>
> >>> http://www.dnsstuff.com/ -----Original Message-----
> >>> From: nobody@groupstudy.com
> >>> [ mailto:nobody@groupstudy.com
> >>> ] On Behalf Of
> >>> Victor Cappuccio
> >>> Sent: Sunday, 9 April 2006 4:16 PM
> >>> To: CCIE LAB
> >>> Subject: a night with an IP Hello all
> >>> I have a little Lab with n Routers connected to a
> >>> Terminal Server, and the Terminal Server connected directly
> >>> to the Internet, who constantly changes the IP Address by a
> >>> remote process in the ISP
> >>> Now is there any way to know what IP Address this poor's
> >>> men rack have now? Maybe something like sending an Email to
> >>> the Admin (me :D) or any other method that could be nice to
> >>> know what IP Address I have now?
> >>> ISP Told me that they do not give up that information, so
> >>> I must wait until Monday to play with my routers :(
> >>> Thanks
> >>> Victor.
> >>>
> >>> ____________________________________________________________________
> >>> ___
> >>> Subscription information may be found at:
> >>> http://www.groupstudy.com/list/CCIELab.html
> >>> ____________________________________________________________________
> >>> ___
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> >>> ___
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> >>
> >> _____________________________________________________________________
> >> __
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> >> www.groupstudy.com/list/CCIELab.html
>
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