Internet Protocol addressing, used to communicate between networked computers

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Thunderbolt Displays' ethernet adapter breaks MacBook DHCP/MAC Address reservations

We have deployed Thunderbolt Displays in my organization, which is almost entirely Mac-based. As you may already know, Thunderbolt Displays have internal Ethernet adapters which is very convenient in ...
4
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1answer
2k views

Static IP for a adhoc wifi network

Do you know if it's possible to give a static IP when creating a ad-hoc network on OS X?
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1answer
2k views

Given its IP, how can I find out the name of a Windows PC on my network?

I'd like to find out the computer name of a Windows PC (like the name shown in the 'Shares' section of the Finder, e.g. bill-pc) given only its IP address. nslookup doesn't do the trick. I'm also ...
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2answers
761 views

SSH connection to Mac works from the outside but not locally

I configured SSH access to my Mac in order to use Prompt on my iPad. That way I can use my Mac from anywhere in the world, as long as I can get my home IP address. Although the SSH connection works ...
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1answer
3k views

Any tips for blocking an address range for outgoing packets?

Anyone used ipfw or pfctl to block an IP address range for outgoing packets? I would like to temporarily block Apple's IP address range 17.*.*.* to find everything that's phoning home phoning home. ...
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2answers
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How can I add external Interface to my OS X with a valid IP?

I connect my Macbook pro to internet through Lan and if I type ifconfig in terminal my en0 interface get valid IP now I want add en1, en2 and en3 to my configuration and they all be able to get valid ...
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1answer
39k views

How do you get a printer's IP in lion?

How did you find out an existing printer's IP in lion? In Snow Leopard you can do it in this way: Open System Preferences Select the printer that you want to find the IP for Click 'Options & ...
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3answers
978 views

How can I gain screen share/ssh access to a G5 connected by ethernet to a Mac Mini on my wireless Airport Extreme Network from my MacBook Pro?

Ok, so the scenario is this: I have a G5 Quad (running Leopard) with no wireless card. The G5 is connected by ethernet to a Mac-Mini (running Lion), which is picking up my AirPort Extreme network ...
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2answers
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How can I add standard users to the print managers group?

I'm sysadmin for a small company; my users are on 10.6.8 (iMacs) and do not have admin rights for various reasons. The only times this is annoying is when a print job jams or otherwise does not go ...
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1answer
1k views

Set IP adress for the wifi hotspot on OSX

If I share my ethernet over WiFi I would like to specify the IP address of the hotspot (for now it defaults to 10.0.2.1). Can this be set somewhere in system settings? Note: the ethernet is not ...
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1answer
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How to configure a static IP for a specific access point on OS X?

I own a MacBook Pro and always used Ubuntu in the past. In Ubuntu, I was able to configure my IP, DNS, Gateway, for a specific access point. There was a list of all the access points, each one with ...
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2answers
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Editing Hosts File to Redirect URL to different IP Address

When I edit my hosts file to redirect a URL to a specific IP address, nothing happens. My hosts file looks like this - 199.204.138.195 zionica.com this is in the directory /private/etc/hosts. I am ...
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1answer
2k views

How can I add static route?

How can I add a static route "forever", that means without retyping add route in Terminal each time I'm using VPN? I found this solution for 10.6, but what if there is a nicer one for 10.7?
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1answer
2k views

IP address changing too frequently

My Macbook pro is connected to my router over the AirPort. The IP address it gets changes every few hours. Is there a way on the mac to request the same address. I do not have access to the router to ...
0
votes
1answer
38 views

How can I troubleshoot sharing problems from outside the LAN?

I'm trying to connect with a server that is not on the same network as my mac, when I enter the ip address the connection doesn't go through. The ip is correct, the server is on, and remote access ...
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2answers
2k views

Find information about host IP address?

Is there anyway to ping a computer's IP and find out some basic information about it? Platform, OS, etc... If so, how would that be done?
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6answers
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How do I find my IP Address from the command line?

I know you can do ifconfig | grep inet, but that shows you several IPv4 addresses. How do I get the specific one for SSHing et al?
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3answers
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Ping all IPs in LAN

How would I find out all the devices on my LAN by pinging them all in terminal? What would the code be?
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0answers
239 views

kernel.log contains thousands of messages about ip_len checksum. What gives?

My Mac Pro Cyrus (running 10.6.8 in 64 bit mode) keeps writing the same message (for different lengths) to the kernel.log file every second: cyrus kernel[0]: in_delayed_cksum_offset: ip_len 36608 ...
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2answers
24k views

Getting IP address of hotspot connection

I want to find out the IP address of my iPhone Hotspot connection. I can enable it, and connect to it with a laptop, etc - but I want the IP address so I can telnet to the iPhone (I've set up the ...
2
votes
1answer
2k views

AirPort Extreme not accepting ISP cable modem DHCP

I've just recently changed the ISP and now have a cable modem, which only has one LAN port. Connecting here requires to use DHCP to get an IP address. Connecting my laptop works just fine and I get an ...
2
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1answer
3k views

AirPort Extreme: Keep IP address from changing

I've got an AirPort Extreme base station that I use for several computers and devices. I set it to configure IPv4 with DHCP, but there's a problem with that: The IP changes from time to time (as ...