Equivalent of XP's "Automatic Private IP Address"?

Does Leopard have the equivalent of XP’s “Automatic Private IP Address”, which generates a range of IP address if a DHCP server isn’t available?
If not what is the recommended download for allowing Leopard to generate IP addresses if no DHCP server is available?

Well, technically you can't generate IP addresses without some sort of DHCP server. But to answer your question in OS X it's called Internet Sharing which enables a computer with an Internet connection to share that connection with other computers. Select Mac Help from the Finder's Help menu and search for "internet sharing."
However, it would be preferable to use a router.

Similar Messages

Private IP Addressing---? Manual Settings

Our Cbeyond service gives info that we have Private IP Addressing for Network Config. Public IP Addressing is not provided.
Does that mean that I can't use Automatic but must do Manual Settings for Internet Accesss?

Okay I know you are going to ask how.
When you visit the above website actually when you visit any website, it needs to know your external IP address in order to deliver the information from that website to your browser.
What the browser wants to do is send a command to the Web server on www.apple.com that looks like this:
GET /index.html HTTP/1.0
Here's how that happens. The command is made into a packet, a block of bits like a telegram that is wrapped with three important things; the source address (the IP address of your machine), the destination address (17.254.0.91 ), and a service number or port number (80, in this case) that indicates that it's a World Wide Web request.
Your machine then ships the packet down the wire (your connection to your ISP, or local network) until it gets to a specialized machine called a router. The router has a map of the Internet in its memory — not always a complete one, but one that completely describes your network neighborhood and knows how to get to the routers for other neighborhoods on the Internet.
Your packet may pass through several routers on the way to its destination. Routers are smart. They watch how long it takes for other routers to acknowledge having received a packet. They also use that information to direct traffic over fast links. They use it to notice when another router (or a cable) have dropped off the network, and compensate if possible by finding another route.
Once your packet gets to its destination machine, that machine uses the service number to feed the packet to the web server. The web server can tell where to reply to by looking at the command packet's source IP address.
This is your external IP address in other words the website needs to know where to send the webpage information back to.
When the web server returns this document, it will be broken up into a number of packets. The size of the packets will vary according to the transmission media in the network and the type of service.
So why doesn't it supply your internal address, well this is because your router uses NAT and it knows what client on the internal network asked for the information and it is the router (with the external IP address) which asks and therefore when it receives it back, it then forwards it to the client.
As the router asked for the info, it is the router's address which is reported (the external address) and not the internal address.
What this means is that everything you ever ask for on the internet is recorded by the websites you visit.
iFelix
PS In future Gino please start a new topic (referencing the one that sparked the question) to avoid over-complicating topics, thank you.

Bypass proxy for FQDN with private ip addresses

We have Windows 7 with IE 11
We need this IE behavior:
"to all FQDN names that resolves to local (private) ip addresses - do not use proxy."
how can we implement this?
("Bypass Proxy Server for Local Addresses" Option don't work as needed)

Hi,
Please take a check to see if the following KB article could help here:
Internet Explorer Uses Proxy Server for Local IP Address Even if the "Bypass Proxy Server for Local Addresses" Option Is Turned On
The cause: By default, only host names are checked when the Bypass proxy server for local addresses option is turned on.
The resolution here is :
To bypass a range of IP addresses or a specific domain name, specify the addresses in the proxy exception list:
In Internet Explorer, on the Tools menu, click Internet Options.
On the Connections tab, click LAN Settings.
Click Advanced, and type the appropriate information in the
Exceptions area.
Hope this may help
Best regards
Michael Shao
TechNet Community Support

Private IP addresses

Which three addresses are private IP addresses? (Choose three.)
a 10.0.0.1
b 46.1.1.88
c 172.31.31.10
d 172.32.16.10
e 192.168.8.8
Can you tell me the right answer ?
I think the correct answer is a,c,e am I right ?
thanks

Jan
Yes you are right, the private IP address ranges are -
10.0.0.0/8 which covers 10.0.0.0 -> 10.255.255.255
172.16.0.0/12 which covers - 172.16.0.0 -> 172.31.255.255
192.168.0.0/16 which covers 192.168.1.0 -> 192.168.255.255
Jon

HT3477 I am attempting to set up a guest network. When I change the Network settings to DHCP NAT I get a message that tells me that the service has a private IP address and so I must connect using off bridge mode. In this mode I can not connect to the int

I am attempting to set up a guest network on the Airport Extreme Base Station. The Base Station is connected to a DSL Modem. The network is also extended using an Airport Express. When I have attempted to set up the Base Station using DHCP NAT in the netword feature I get a message that because the service has a private IP address the only way that I can connect is in Off Bridge Mode. In this mode I do not seem to be able to connect to the internet using the guest network. Any suggestions would be helpful.

Ok, your Speedport is actually a combination DSL modem and wireless router. In this case you would typically configure a downstream router, like your AirPort Extreme in Bridge mode. Unfortunately, when in Bridge mode, the AirPort does NOT support providing a guest network.
The only possible option is to reconfigure the Speedport as a bridge and use the Extreme as your Internet router. You would still need the DSL modem provided by the Speedport for Internet connectivity.

Automatic "Reply to" address when sending emails?

Is there a way to automatically include an address in the "Reply to" field in all my outgoing emails, similar to the way Mail can automatically put your own address in the CC or BCC field?

Oh, I just found two possible ways in another thread but they have serious drawbacks:
1. Change the "send new email from" address in the prefs. Unfortunately Mail won't let me create an account with my desired email address because the address I want to use has the same host and user name as my "From" address.
2. Go into Terminal and make a permanent "Reply To" address. This method is so arcane and scary that I really don't like the idea, plus it's unchangeable.
Apple should offer an option to include an automatic "reply to" feature. If they don't, they dropped the ball on that one.

Port map to more than one 'private IP address'

Hi,
probably a silly question, but ...
Is it possible to port map on an Airport Express to more than one private IP address? IOW, if the first IP address is not available/active, then the port is forwarded to the second IP address.
Grant

Hi iFelix,
yes, I have 2 networks, home & studio. I take my powerbook with me between the 2. When I am in one of them, I want to be able to control the other.
At the moment, I can map to another machine (not my powerbook) in the Airport Express settings and then I can connect via VNC. If however, I want to have a more complete control, I need to map port 3283 specifically to my powerbook. Obviously, if the powerbook is with me, then it's not where I'm not, if you follow the rather Pooh bear logic.
My problem would be solved if I could map to one IP address as default, with a second if that address were not resolved/found/available.
As for VPN, yes as I have gleaned from much browsing of net and these forums, this would solve my problem, but it seems overly complicated to set up for a non-IT person. Looking at the interface for a router/modem is a frightening thing for people who only do this once in a blue-moon.
Grant
AluBook 17

How is the "Private IP address" field supposed to work?

I have been trying to forward port 25565 using an Airport Extreme. I know how to forward ports, and I know my IPv4 address is 10.0.1.2. The router (Airport Extreme)'s address is 10.0.1.1. However, when I go into the AirPort Utility and try to configure this, it gives me a field after "10.0.1.2" asking for some mysterious extra number on the end of this already complete address. It will not let me continue without filling this box out, but what do I put in it? ipconfig clearly shows that 10.0.1.2 is the extent of my computer's private IP. What do I put in this box? How is this supposed to work at all?
Also, the "Browse..." button to the right of the mysterious field is utterly useless; it opens a window showing nothing in particular.

Configuring port mapping on the Extreme typically takes two basic steps. Configuring the host with either a static or DHCP-reserved IP address, and then, assigning the appropriate UDP & TCP ports to the host.
AEBSn - Port Mapping Setup
To setup port mapping on an 802.11n AirPort Extreme Base Station (AEBSn), either connect to the AEBSn's wireless network or temporarily connect directly, using an Ethernet cable, to one of the LAN port of the AEBSn, and then use the AirPort Utility, in Manual Setup, to make these settings:
1. Reserve a DHCP-provided IP address for the host device.
AirPort Utility > Select the AEBSn > Manual Setup > Internet > DHCP tab
On the DHCP tab, click the "+" (Add) button to enter DHCP Reservations.
Description: <enter the desired description of the host device>
Reserve address by: MAC Address
Click Continue.
MAC Address: <enter the MAC (what Apple calls Ethernet ID if you are using wired or AirPort ID if wireless) hardware address of the host computer>
IPv4 Address: <enter the desired IP address>
Click Done.
2. Setup Port Mapping on the AEBSn.
AirPort Utility > Select the AEBSn > Manual Setup >Advanced > Port Mapping tab
Click the "+" (Add) button
Service: <choose the appropriate service from the Service pop-up menu>
Public UDP Port(s): <enter the appropriate UDP port values>
Public TCP Port(s): <enter the appropriate TCP port values>
Private IP Address: <enter the IP address of the host server>
Private UDP Port(s): <enter the same as Public UDP Ports or your choice>
Private TCP Port(s): <enter the same as Public TCP Ports or your choice>
Click "Continue"

Cannot resolve private host addresses

Hi,
I have a MacBookPro (10.5.5) in a Windows Network. After our Primary Domain Controller
was updated i get a strange error message when i want to view my network neighbourhood.
The name next to the network icon reads "cannot.resolve.private.host.addresses".
I googled but I have not found a single resource mentioning this error message.
I have access to the internet, i can access all shares in the network via command+k but i cannot
browse the network because of this error.
what is it? what is it that the mac cannot resolve? where can i look further into resolving this issue?
thnx very much
martin

Problem solved
It seems that the Mac made a reverse lookup for its own IP-Adress to get its own name.
Since the new Domain Controller did not have Reverse Lookups enabled the aforementioned problem occured.
After enabling them everything is working fine now

MPLS over ATM and Private IP addresses

Are there any caveats using private IP addresses at one site and public registered IP addresses at another site connecting with MPLS over ATM thru our ISP?

No. You should be able to configure this using NAT.

Shows my private IP address in website

Hi
I usess private ip address like 192.168.10.50 and it goes to internet by nating in router.
but when i visit www.dnsstuff.com then wonder to see my IP address and nating real IP address.
so my question how they know my address even in yahoo chat also found that you connect from this IP address, how it is possible.
thanks
Biplob

Hello,
Looking at the site, I'd say they use the My IP Address tool added 16-Aug-2005. If you click that link and go to the more info you will see additional detailed information about your connection.
For my connection I see either my NAT'd VPN IP or my NAT'd public IP. I do not see the 192.168.x.x or 10.x.x.x address in the output.
Hope this helps.
Regards,
James

Is there a way to to set up safari for automatic private browsing?

Without having to select it from the safari tab each time you launch the app.?
Automatically.

Is there a way to to set up safari for automatic private browsing... Without having to select it from the safari tab each time you launch the app.?
Here's one option...
Follow these steps to ensure that Private Browsing is turned on automatically each time Safari launches:
1) Under System Preferences > Universal Access, check "Enable access for assistive devices."
2) Copy the code below and paste it into your AppleScript Script Editor, located in your Applications > AppleScript folder:
*activate application "Safari"*
*tell application "System Events"*
*tell process "Safari"*
*click menu item "Private Browsing…" of menu 1 of menu bar item "Safari" of menu bar 1*
*if exists button "OK" of window 1 then*
*click button "OK" of window 1*
*end if*
*end tell*
*end tell*
From the Script Editor's File menu choose Save As > File Format: application, and leave the Options unchecked. Place the saved script in your User > Library > Scripts folder, or in some other out-of-the-way place on your hard drive.
3) Download and install Do Something When. Set up a new rule with Do Something When and configure it to open the newly saved AppleScript app when Safari launches.
Works for me, using Mac OS 10.4.11.
Best regards... Good luck.

Gethostbyaddr failing for private IP addresses

We are having problems with reverse DNS resolution for our private IP addresses. We first noticed this when our syslog-ng was not displaying name in the log entries, but rather IP addresses.
Nslookup and dig reversed resolved the addresses fine, so we don�t think the issue is in DNS.
We further narrowed down the source of the problem when we wrote a small C program that called gethostbyaddr for the private address. This program also failed to reverse resolve the addresses.
We decided to snoop the traffic to our DNS server. What we saw was that no packets were being sent. In other words our Solaris server didn�t even try to query DNS for the reverse resolution.
Is there a flag or setting somewhere in Solaris that we can adjust to have reverse resolution for private IP addresses sent to our DNS servers?
Thanks�
Mike

Make sure the addresses aren't already present in /etc/hosts or /etc/inet/ipnodes. Otherwise it probably won't attempt to use DNS.
Darren

Third Party VPN Solution - Private/Dynamic Addressing

I am looking for a solution for the following:
I need a to bring up sites in remote locations that don't have access to Cisco gear. I would like to be able to grab a PC or Linksys or equivalent and bring up a site to site VPN with a Cisco router.
The Internet connectivity at these locations typically is using dynamic, private addressing.
I am aware of the DMVPN solution but again this would require Cisco gear at the remote site.
We have Cisco gear at the Head End.
Does anyone know of a model of highly available cheap hardware or a software package that can be loaded onto a PC to accomplish this?
Please advise.
Thanks!

We are looking for a site to site model. I want all the devices on the remote network to be on their own subnet. We need to be able to hit individual remote devices from the head end. The devices at the remote site in turn also need to be able to communicate with each other without having to use the VPN.

How can I make DHCP Service automatically assign IP addresses?

We decided on using OS X Server's DHCP service rather than depend on our router to dole out IPs. Here's the size and shape of our local subnet:
Range: 192.168.0.0 to 192.168.7.255
Mask: 255.255.248.0
Router: 192.168.1.1
DNS: ....etc...
We're trying to have the DHCP block managed as 192.168.2.0 through 192.168.2.255. Maybe I'm missing something, but shouldn't DHCP automatiScally assign IPs in that range every time someone plugs in a computer? Right now we're having to enter MAC + IP static maps manually into Server Admin, which is a major pain. How can we fix that so it becomes automatic?
Here's how DHCP service is set on our quad-Ethernet Xserve Xeon. en0 / en1 / en2 / en3 are all set up the same, but only en0 is checked:
GENERAL:
Subnet Name: Our LAN (en0)
Starting IP Address: 192.168.2.0
Ending IP Address: 192.168.2.255
Subnet Mask: 255.255.248.0
Network Interface: en0
Router: 192.168.1.1
Lease Time: 4 hours
DNS Servers:
192.168.1.100.... etc.
Default Search Domain: ourdomain.private
LDAP:
Server Name: (blank)
Search Base: (blank)
Port: (Leave blank to use the default port)
[ ] LDAP over SSL
URL:
WINS:
WINS/NBNS Primary Server: 10.0.1.20
WINS/NBNS Secondary Server: 10.0.1.21
NBDD Server: 1.0.1.22
NBT Node Type: Not Set
NetBIOS Scope ID: (blank)
I'm stuck.... I thought all I'd have to do is define a suitable range, like the 256 addresses in the middle of our DHCP block, but it's not enough. Your help is certainly appreciated.
- Bert

This morning I stumbled onto the solution (at least a partial solution). I noticed in /var/log/system.log that there were warnings to the effect of "Hey -- you've got disabled DHCP ports that have conflicting ranges with your enabled DHCP port." Previously, I hadn't thought this was a major error, but when I deleted the three disabled ports from DHCP (en1, en2, and en3) and restarted DHCP then everything started working correctly. Hosts that were previously not getting IP addresses assigned because they weren't listed in Static Maps are now getting addresses.
The log entries looked basically like this:
Apr 19 09:54:38 myserver servermgrd[50]: servermgr_dhcp:bootp config:Error:Subnets 'My LAN (en2)' and 'My LAN (en0)' have overlapping ranges: '1\
92.168.2.0-192.168.2.255' overlaps '192.168.2.0-192.168.2.255'
Apr 19 09:54:38 myserver servermgrd[50]: servermgr_dhcp:bootp config:Error:Subnets 'My LAN (en2)' and 'My LAN (en3)' have overlapping ranges: '1\
92.168.2.0-192.168.2.255' overlaps '192.168.2.0-192.168.2.255' - 'My LAN (en3)' is not active
Apr 19 09:54:38 myserver servermgrd[50]: servermgr_dhcp:bootp config:Error:Subnets 'My LAN (en2)' and 'My LAN (en1)' have overlapping ranges: '1\
92.168.2.0-192.168.2.255' overlaps '192.168.2.0-192.168.2.255' - 'My LAN (en1)' is not active
Apr 19 09:54:38 myserver servermgrd[50]: servermgr_dhcp:bootp config:Error:Subnets 'My LAN (en0)' and 'My LAN (en2)' have overlapping ranges: '1\
92.168.2.0-192.168.2.255' overlaps '192.168.2.0-192.168.2.255' - 'My LAN (en2)' is not active
Apr 19 09:54:38 myserver servermgrd[50]: servermgr_dhcp:bootp config:Error:Subnets 'My LAN (en0)' and 'My LAN (en3)' have overlapping ranges: '1\
92.168.2.0-192.168.2.255' overlaps '192.168.2.0-192.168.2.255' - 'My LAN (en3)' is not active
: and so on
The next problem I need to work through is why there's huge amounts of DHCP-related traffic in the logs. It's clogging up with stuff like this:
Apr 19 10:33:40 fannxfile bootpd[54475]: DHCP DISCOVER [en3]: 1,0:e:8:eb:47:90 <SipuraSPA>
Apr 19 10:33:40 fannxfile bootpd[54475]: replying to 192.168.2.44
Apr 19 10:33:40 fannxfile bootpd[54475]: OFFER sent <no hostname> 192.168.2.44 pktsize 303
Apr 19 10:33:40 fannxfile bootpd[54475]: service time 0.000404 seconds
Apr 19 10:33:40 fannxfile bootpd[54475]: DHCP DISCOVER [en0]: 1,0:e:8:eb:47:90 <SipuraSPA>
Apr 19 10:33:40 fannxfile bootpd[54475]: replying to 192.168.2.44
Apr 19 10:33:40 fannxfile bootpd[54475]: OFFER sent <no hostname> 192.168.2.44 pktsize 303
Apr 19 10:33:40 fannxfile bootpd[54475]: service time 0.000385 seconds
Apr 19 10:33:40 fannxfile bootpd[54475]: DHCP DISCOVER [en1]: 1,0:e:8:eb:47:90 <SipuraSPA>
Apr 19 10:33:40 fannxfile bootpd[54475]: replying to 192.168.2.44
Apr 19 10:33:40 fannxfile bootpd[54475]: OFFER sent <no hostname> 192.168.2.44 pktsize 303
Apr 19 10:33:40 fannxfile bootpd[54475]: service time 0.000363 seconds
Apr 19 10:33:40 fannxfile bootpd[54475]: DHCP REQUEST [en2]: 1,0:e:8:eb:47:90 <SipuraSPA>
Apr 19 10:33:40 fannxfile bootpd[54475]: replying to 192.168.2.44
Apr 19 10:33:40 fannxfile bootpd[54475]: ACK sent <no hostname> 192.168.2.44 pktsize 303
Apr 19 10:33:40 fannxfile bootpd[54475]: service time 0.000597 seconds
Apr 19 10:33:40 fannxfile bootpd[54475]: DHCP REQUEST [en3]: 1,0:e:8:eb:47:90 <SipuraSPA>
Apr 19 10:33:40 fannxfile bootpd[54475]: service time 0.000103 seconds
Apr 19 10:33:40 fannxfile bootpd[54475]: DHCP REQUEST [en0]: 1,0:e:8:eb:47:90 <SipuraSPA>
Apr 19 10:33:40 fannxfile bootpd[54475]: service time 0.000298 seconds
Apr 19 10:33:40 fannxfile bootpd[54475]: DHCP REQUEST [en1]: 1,0:e:8:eb:47:90 <SipuraSPA>
Apr 19 10:33:40 fannxfile bootpd[54475]: service time 0.000153 seconds
Apr 19 10:33:40 fannxfile bootpd[54475]: DHCP REQUEST [en2]: 1,0:e:8:eb:47:90 <SipuraSPA>
Apr 19 10:33:40 fannxfile bootpd[54475]: service time 0.000134 seconds
Apr 19 10:33:40 fannxfile bootpd[54475]: DHCP REQUEST [en3]: 1,0:e:8:eb:47:90 <SipuraSPA>
Apr 19 10:33:40 fannxfile bootpd[54475]: service time 0.000139 seconds
Apr 19 10:33:40 fannxfile bootpd[54475]: DHCP REQUEST [en0]: 1,0:e:8:eb:47:90 <SipuraSPA>
Apr 19 10:33:40 fannxfile bootpd[54475]: service time 0.000125 seconds
Apr 19 10:33:40 fannxfile bootpd[54475]: DHCP REQUEST [en1]: 1,0:e:8:eb:47:90 <SipuraSPA>
Apr 19 10:33:40 fannxfile bootpd[54475]: service time 0.000174 seconds
This is happening REALLY fast. Every second there's a block of log entries like the above. I don't get it because I've set the lease times to 4 hours. I'll reset the leases back to 12 hours, but I don't understand what's causing the rapid fire log entries.
Perhaps the smart thing to do at this point is to reboot the server.
To answer some of your specific questions:
Q: Have you tried specifying the range as 192.168.0.1 - 192.168.7.254 instead? Please don't take this the wrong way but is the service actually running?
A: Yes, definitely up and running. Hosts that are in the static map were getting addresses. After deleting the three disabled Ethernet ports with conflicting ranges, I'm also seeing hosts that have not been entered into static maps appearing with dynamic IP addresses, which is what we wanted.
Regarding the suggestion to set the network range to 192.168.0.1 - 192.168.7.254: That's the range the way it was originally set, but I thought what the range was supposed to be was the smaller block of addresses you wanted DHCP to draw from out of your total subnet. I may be wrong, but doesn't DHCP service already know your total network size from the network mask? [255.255.248.0 in our case] This implies that our subnet ranges from 192.168.0.0 to 192.168.7.255 (including base and broadcast addresses at both ends).
My thought was that the "Starting IIP Address" and "Ending IP Address" wanted to be the range of addresses in that that I wanted to use as a pool for DHCP. Hence 192.168.2.0 through 192.168.2.255. We have devices with static IP addresses on our network (servers, printers, and our VoIP phone system, mostly) on 192.168.0.xxx, 192.168.1.xxx and 192.168.3.xxx, and if DHCP doubly assigns addresses in these ranges to our workstations, then we're in big trouble.
Q: sudo serveradmin fullstatus dhcp
A: ...that produces the following output now following deletion of the DHCP ports with conflicting ranges:
fannxfile:log root# serveradmin fullstatus dhcp
dhcp:setStateVersion = 1
dhcp:servicePortsAreRestricted = "NO"
dhcp:numConfiguredStaticMaps = 43
dhcp:dhcpLeasesArray:arrayindex:0:timeLeft = 12201
dhcp:dhcpLeasesArray:arrayindex:0:clientID = ""
dhcp:dhcpLeasesArray:arrayindex:0:computerName = ""
dhcp:dhcpLeasesArray:arrayindex:0:macAddress = "00:1b:63:17:a3:bd"
dhcp:dhcpLeasesArray:arrayindex:0:ipAddress = "192.168.2.21"
dhcp:dhcpLeasesArray:arrayindex:1:timeLeft = 12168
dhcp:dhcpLeasesArray:arrayindex:1:clientID = ""
dhcp:dhcpLeasesArray:arrayindex:1:computerName = ""
dhcp:dhcpLeasesArray:arrayindex:1:macAddress = "00:1b:63:17:a3:bd"
dhcp:dhcpLeasesArray:arrayindex:1:ipAddress = "192.168.2.9"
dhcp:state = "RUNNING"
dhcp:logPaths:systemLog = "/var/log/system.log"
dhcp:backendVersion = "10.5"
dhcp:timeOfModification = "2009-04-19 10:05:46 -0700"
dhcp:numDHCPActiveClients = 2
dhcp:numDHCPLeases = 2
dhcp:timeOfSnapShot = "2009-04-19 10:43:09 -0700"
dhcp:timeServiceStarted = "2009-04-19 10:05:46 -0700"
dhcp:readWriteSettingsVersion = 1
dhcp:servicePortsRestrictionInfo = emptyarray
-- Bert Sierra

Equivalent of XP's "Automatic Private IP Address"?

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