BIND, dynamic DNS - Revision history

Jimbo: Reverted edits by DavidYoung (talk) to last revision by 92.238.108.57

2012-08-25T21:30:01Z

Reverted edits by DavidYoung (talk) to last revision by 92.238.108.57

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DavidYoung: minor updates

2012-08-12T20:06:23Z

minor updates

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92.238.108.57: Undo spam

2012-08-03T20:32:03Z

Undo spam

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DavidYoung: minor updates

2012-08-02T10:15:37Z

minor updates

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Shlomif: Update script with more modern code and better error handling and reporting.

2012-04-15T15:43:49Z

Update script with more modern code and better error handling and reporting.

Jimbo at 04:51, 24 March 2012

2012-03-24T04:51:45Z

Jimbo: Reverted edits by 91.204.27.30 (talk) to last revision by 178.192.99.115

2012-03-24T04:50:59Z

Reverted edits by 91.204.27.30 (talk) to last revision by 178.192.99.115

91.204.27.30: /* Restarting and testing BIND at the server */

2012-03-22T04:17:07Z

Restarting and testing BIND at the server

178.192.99.115: /* set-ddns.pl (a freebsdwiki.net original) */

2011-09-18T18:47:28Z

set-ddns.pl (a freebsdwiki.net original)

69.196.132.209: missing space

2011-07-20T01:45:32Z

missing space

@@ Line 195: / Line 195: @@
 #          of the BIND8 version higher up in the PATH, even in systems shipped
 #          with BIND9 in the base install!
 use LWP::UserAgent;
@@ Line 200: / Line 210: @@
 use HTTP::Response;
-$NAMESERVER = 'server.net.';
+my $NAMESERVER = 'server.net.';
-$KEYDIR = '/usr/home/ddns';
+my $KEYDIR = '/usr/home/ddns';
-$KEYFILE = 'Kclient.server.net.+157+15661.private';
+my $KEYFILE = 'Kclient.server.net.+157+15661.private';
-$TYPE = 'A';
+my $TYPE = 'A';
-$TTL = '10';
+my $TTL = '10';
-$HOST = 'client.server.net';
+my $HOST = 'client.server.net';
-$url_string = 'http://server.net/ip.php';
+my $url_string = 'http://server.net/ip.php';
-$ua = LWP::UserAgent->new;
+my $ua = LWP::UserAgent->new;
-$req = HTTP::Request->new('GET',$url_string);
+my $req = HTTP::Request->new('GET',$url_string);
-$resp = $ua->request($req)->as_string();
+my $resp = $ua->request($req)->as_string();
-$_ = $resp;
+my $WAN;
-m/.*?Current IP Address\: (\d{0,3}\.\d{0,3}\.\d{0,3}\.\d{0,3}).*/gs;
+if (not
-$WAN = $1;
 print "==============================\nWAN IP parsed: $WAN\n==============================\n";
 chdir ($KEYDIR);
-open (NSUPDATE, "| /usr/sbin/nsupdate -k $KEYFILE");
-print NSUPDATE "server $NAMESERVER\n";
+open (my $nsupdate_fh, "| /usr/sbin/nsupdate -k $KEYFILE")
-print NSUPDATE "update delete $HOST A\n";
+    or die "Cannot open nsupdate! $!";
-print NSUPDATE "update add $HOST $TTL A $WAN\n";
+print {$nsupdate_fh} "server $NAMESERVER\n";
-print NSUPDATE "show\n";
+print {$nsupdate_fh} "update delete $HOST A\n";
-print NSUPDATE "send\n";
+print {$nsupdate_fh} "update add $HOST $TTL A $WAN\n";
-close (NSUPDATE);</nowiki>
+print {$nsupdate_fh} "show\n";
 OK, that should be it - let's lock down our permissions:

@@ Line 109: / Line 109: @@
 Ok, we've found and killed our previous instance of BIND (don't just use -HUP - you need to kill it all the way), then gotten it back up and confirmed it's running.  Now let's see if it responds properly when we ask it about the new zone:
-  <nowiki>#server '''dig @localhost client.server.net'''
+  <nowiki>#server dig @localhost client.server.net
 ; <<>> DiG 9.3.1 <<>> @localhost ANY client.server.net
 ; (1 server found)

@@ Line 109: / Line 109: @@
 Ok, we've found and killed our previous instance of BIND (don't just use -HUP - you need to kill it all the way), then gotten it back up and confirmed it's running.  Now let's see if it responds properly when we ask it about the new zone:
-  <nowiki>#server dig @localhost client.server.net
+  <nowiki>#server '''dig @localhost client.server.net'''
 ; <<>> DiG 9.3.1 <<>> @localhost ANY client.server.net
 ; (1 server found)

@@ Line 109: / Line 109: @@
 Ok, we've found and killed our previous instance of BIND (don't just use -HUP - you need to kill it all the way), then gotten it back up and confirmed it's running.  Now let's see if it responds properly when we ask it about the new zone:
-  <nowiki>#server '''dig @localhost client.server.net'''
+  <nowiki>#server dig @localhost client.server.net
 ; <<>> DiG 9.3.1 <<>> @localhost ANY client.server.net
 ; (1 server found)

← Older revision		Revision as of 18:47, 18 September 2011
Line 247:		Line 247:

	Outstanding! If your results didn't come out right the first time, check to see if your WAN IP parsed correctly, then check the output of '''nsupdate''' below it for ZONE FAILED, UPDATE REFUSED, or ROLLFORWARD FAIL messages. If you got a ROLLFORWARD FAIL message, that basically means that you messed with the seed file on the server after you'd begun dynamically updating it - but don't let that scare you, you'll just have to go [[rm]] its journal file. Journal files are typically found in the /var working mirror of namedb; in the example above it would be at /var/named/etc/namedb/zones/client.server.net.jnl.		Outstanding! If your results didn't come out right the first time, check to see if your WAN IP parsed correctly, then check the output of '''nsupdate''' below it for ZONE FAILED, UPDATE REFUSED, or ROLLFORWARD FAIL messages. If you got a ROLLFORWARD FAIL message, that basically means that you messed with the seed file on the server after you'd begun dynamically updating it - but don't let that scare you, you'll just have to go [[rm]] its journal file. Journal files are typically found in the /var working mirror of namedb; in the example above it would be at /var/named/etc/namedb/zones/client.server.net.jnl.
		+
		+	If your server does update, but you get "; Communication with server failed: timed out" on the client, add "-v" to the open call: ''open (NSUPDATE, "\| /usr/sbin/nsupdate -k $KEYFILE -v");''

	== Setting up a crontab ==		== Setting up a crontab ==

@@ Line 25: / Line 25: @@
   client# '''which nsupdate'''
   /usr/sbin/nsupdate
-  client# '''ls -l /usr/bin/nsupdate && ls-l /usr/sbin/nsupdate'''
+  client# '''ls -l /usr/bin/nsupdate && ls -l /usr/sbin/nsupdate'''
   -r-xr-xr-x  1 root  wheel  1252248 May  8  2005 /usr/bin/nsupdate
   -r-xr-xr-x  1 root  wheel   245324 Jul  5  2004 /usr/sbin/nsupdate