Questions about configuring, troubleshooting or using connections that one device uses to talk to another.

learn more… | top users | synonyms (1)

6
votes
5answers
20k views

How to find IP address of my other Mac?

I have two Macs on the same network, both plugged into my internet router. I have screen-sharing set up on one of them, so I can connect to it using command-K in the Finder with a vnc:// URL, and ...
6
votes
2answers
3k views

What is the preferred method of command line domain name lookup (DNS)?

What command line command do I use to lookup a domain address? When looking at the man pages for nslookup and dig I can see a section saying that these utilities do not use the Mac OS methods of ...
6
votes
3answers
757 views

A utility for tuning your WiFi network?

Is there an app available to help tune Wi-Fi network settings? My local air space is starting to get congested and I want to make sure I'm using the optimal channel and settings on my router to avoid ...
6
votes
2answers
639 views

“Airplane Mode” in OS X. Alternative command for `rfkill`?

This question is an exact duplicate of this post from superuser.exchange.com. I believe this is a valid question for both of sites and hope I am not (if any) violating stackexchange policies. ...
6
votes
1answer
328 views

Is it possible that some hacker is logged in to my computer?

When I type w at the terminal I see myself logged in two times. What are console and s000? Is it possible that one of these neos is actually somebody else?
6
votes
2answers
20k views

How to use WiFi and Ethernet at the same time

Brief Description: I need my Ethernet card (en0) to see all traffic under 192.168.2.xxx. However I also need to use WiFi card (en1) for all other traffic. OS: OS X Lion I am using a separate ...
6
votes
4answers
2k views

How can I get the exact URLs/requests that a program is trying to connect to?

I currently use Little Snitch to control network traffic on my Macbook Pro, and see what my apps are connecting to. Unfortunately, Little Snitch only shows you the hostname that an app is connecting ...
6
votes
4answers
3k views

Equivalent of airodump-ng for Max OS X

Is there any equivalent of airodump-ng for Mac OS X (it only runs on linux), providing an overview of the current wireless traffic on nearby Access Points, i.e: number of captured data packets list ...
6
votes
5answers
907 views

What is a good Time Capsule substitute?

I am looking for something similar to Time Capsule, but I am really not interested in the wireless router capabilities. Can you suggest hardware which has the same good qualities (size, silent ...
6
votes
2answers
19k views

How to block internet traffic of an application?

Little Snitch can block internet traffic of a particular app. Can I do something similar without (paying) Little Snitch?
6
votes
1answer
13k views

How can I turn off my Time Capsule's wireless router?

I have a useful wireless network, and then my Time Capsule's wireless network, which overpowers the other network when the computer is next to it. I don't know if it's misconfigured, but the Time ...
6
votes
3answers
3k views

ethtool Equivalent for OS X Lion

Other than ifconfig, is there an app/script for OS X Lion that produces similar output/info to ethtool? Specifically, I would like to be able to query the following: driver info online/offline ...
6
votes
3answers
2k views

Which ports does the Messages app for OS X use?

If someone has a list of the ports that Messages uses I would appreciate that answer here. Extra votes and thanks for providing a reference. I have searched the knowledgebase and found this, but it ...
6
votes
5answers
4k views

Why doesn't Airport reconnect after sleep or shutdown?

I have a MacBook Pro (2.4 GHz Core 2 Duo, running OS X 10.6.8) that does not reconnect to its stored WiFi network after it restarts or goes to sleep. To reconnect, I need to go into System Preferences ...
6
votes
5answers
985 views

Is there a way to use different network connections for different apps

At work we have a firewall that prevents certain outbound connections. But I also have a Clear wireless personal hotspot. I would like to use the work connection for normal requests but for certain ...
6
votes
6answers
6k views

Print from iPad without AirPrint or Wi-Fi

Consider the following configuration I have a Wi-Fi iPad without 3G support. I also have an HP printer that doesn't not have Wi-Fi capabilities. My printer supports USB. I am planning to buy a 3G ...
6
votes
2answers
3k views

What are “nwnode:” URLs, and why did Lion break them?

After installing OS X 10.7, Dropbox presented the following error upon loading: "URLs with the type "nwnode:" are not supported". I also got this error from Path Finder (although I don't know what I ...
6
votes
1answer
3k views

Natively written packet sniffer / inspector for OS X

I am looking for a packet sniffer / inspector which runs natively on OS X (Cocoa) and not with some sort of compatibility layer like X. Ideally I am looking for an application with the following ...
6
votes
2answers
1k views

How can I get Snow Leopard to properly reconnect to my Windows network drives after it goes to sleep?

My mac goes to sleep. It wakes up. The volumes mounted to a Windows server in my house all work. I can see pictures and listen to music. Until I can't. After two or three sleep/wake cycles, I can't ...
6
votes
2answers
996 views

Internet Sharing handing out wrong DNS server address

I'm using a MacBook Pro with OS X Mavericks 10.9.2. It connects to the internet via a USB 3G dongle, and I want to share that internet connection via wifi. However, on devices that connect to the ...
6
votes
3answers
20k views

Since upgrading to OS X Mavericks, I can't open any files on a SMB share from my Windows 8.1 PC

I have a PC with Windows 8.1 and a Mac with Mavericks. I have a folder on the Mac that is shared with the PC. When I'm on the PC and I try to open a file that is shared by the Mac, such as an ISO file ...
6
votes
1answer
135 views

Software recommendation: Command line network analyser that shows owning process

I'm looking for something that is a mix of tcpdump, lsof, and netstat. I want to be able to filter like tcpdump, but have an additional column showing the process ID. At the end I'd like to be able ...
6
votes
1answer
2k views

How to set custom DNS entry for a particular wifi connection

Is there a way to set custom DNS settings for a single wifi connection without affecting other connections? I use my laptop at home and work. When at work I need to type in an IP address of a local ...
6
votes
2answers
1k views

Per application VPN settings

I use a VPN tunnel to connect to a remote network on Snow Leopard. I set it up with the system settings for VPN and it works fine. Unfortunately, the VPN tunnel is used for all connections. Some ports ...
6
votes
3answers
4k views

Network stops working, with “Can't Assign Requested Address”

On OS X 10.9 (but no prior version), every now and then, I start getting strange network errors. I can still ping, but anything that requires actual content (like a web page) completely stops. For ...
6
votes
3answers
13k views

How to monitor network traffic on a router from a Mac?

A company have a High Speed internet connection (30 MB/s) witch is enough for 10-15 computer. But for a week, there is almost no bandwidth "left" just taking the email take a long time or failed. ...
6
votes
1answer
385 views

How do I emulate Internet Sharing from the command line?

I'm trying to set up my Macbook Air to share an OpenVPN connection for use while I'm on the road and don't want my iOS traffic to go over the open Internet. Sadly, Mountain Lion's Internet Sharing ...
6
votes
1answer
930 views

Mac renames itself automatically

I've got a handleful of macs (all with unique names) and on occasion it prompt a notice about saying another computer on the network as this name and adds a (2) or (3) to my mac. There are no other ...
6
votes
3answers
28k views

Share internet connection from a PC to an iPhone through the USB cable

In the office where I'm working now, my network carrier has very poor reception, so my iPhone 4 cannot access the internet reliably. I have a pc running Windows XP SP3 that is connected to internet ...
5
votes
3answers
2k views

How do I find out the MAC address of my iPad?

I have a new iPad and MAC address filtering on my home wifi network. How do I figure out the MAC address of my iPad?
5
votes
3answers
271 views

Open ports. Safe?

My friend is currently running the default firewall with "Block all incoming connection" (except the basic ones like 80). I just scanned his mac for open ports and I found the following: Open TCP ...
5
votes
5answers
668 views

Is there any network monitor software with a notification area icon?

I often use my laptop in the subway / office buildings where internet connection may be laggy / absent for some period of time. Is there any network monitorying software that can constantly monitor my ...
5
votes
3answers
6k views

Unexpected interfaces in ifconfig

In the middle of installing a tool called mrtg, I bailed out from a perl script to set various configuration parameters for use of snmp because it became clear that I had no idea what I was doing. I ...
5
votes
2answers
2k views

Disconnect from wifi network in Lion, while remembering the connection.

I would like to disconnect from my wifi network on OS X Lion. I do not want to forget the network nor turn wifi off. I just want to be able to connect and disconnect at will. - How do I do this?
5
votes
2answers
2k views

Is there a fast way to change proxy setting?

On my laptop I usually have a ssh connection open and use the remote machine as a proxy server just so that all my network traffic is over ssh. I know that it's hopeless and we're all doomed, but it ...
5
votes
1answer
139k views

What, precisely, does “reset network settings” do on an iPhone?

I use "internet sharing" on my Mac, but lately I've been having trouble connecting my iPhone 5 to the resulting WiFi network. I've read advice online to do Settings -> General -> Reset -> ...
5
votes
1answer
4k views

How to control AirPort wireless radio from the command line?

I want to know how to control (specifically turn off) the networking (specifically AirPort - I want to turn off the radio) from the command line (specifically from bash in Terminal.app, being run by ...
5
votes
3answers
3k views

Internet Sharing stuck on after 10.7.3 update

I use Internet Sharing at work to create a local WiFi network (sharing the GigE connection) for my various iOS and tablet devices to connect through. After the 10.7.3 update, I cannot turn sharing off ...
5
votes
3answers
6k views

Why is my host name wrong at the Terminal prompt when connected to a public WiFi network?

For three days straight, I have connected to the public WiFi network at my local library. Each day, I have seen a different prompt in Terminal. Here are some of the prompts I've seen: zp-pc:~ ...
5
votes
3answers
376 views

Is it possible for two users to remotely log in to a Mac simultaneously?

Can two users share a Mac remotely? What software would be used? I'm wondering if this is a viable idea for two developers to share a Mac for app development.
5
votes
1answer
253 views

iChat sends out connections to an IP address when configuring camera and mic settings

Using LittleSnitch I noticed that Messages (iChat) tries to connect to 17.154.239.222 over udp when I open the audio and video preferences for the application. Apple owns that IP address but does ...
5
votes
5answers
60k views

Will an Airport Express extend the Wi-Fi of another-non Apple Access Point?

My colleague has a cheap Cisco Access Point on another floor. The wireless is very spotty. He is using a Mac Pro. Will an Airport Express work to extend this network?
5
votes
3answers
2k views

My Mac mini's computer name keeps changing when it resumes from sleep

When I wake my Mac mini from sleep, it occasionally comes up with a dialog saying "The name of your computer "whatever" is already in use on this network. The name has been changed to "whatever (1)"" ...
5
votes
4answers
206 views

Recommendations for a good Bandwith Tracker on OS X

Is there a way I can track total bandwidth usage over the course of a month? My service provider requires me to stay within fairly strict limits.
5
votes
2answers
2k views

How can I use Wireshark on a MacBook Air?

I have a new MacBook Air. I would like to run Wireshark on it. But when I choose capture in Wireshark there is no interfaces to capture from. Doesn't Wireshark have support for the MacBook Air WiFi ...
5
votes
4answers
5k views

Apple TV works with my iPhone but not with my PC on the same wireless network

I have: Windows 7 PC with latest version of iTunes connected to my network (wired). Windows Firewall is turned off. Apple TV (2nd generation) connected to my network (wireless) iPhone connected to ...
5
votes
2answers
1k views

Use a network Time Machine drive locally

I typically backup over a network to a networked hard drive on another machine. For some unknown reason, backups tend to get incredibly slow over the network (the first few backups work fine and ...
5
votes
1answer
6k views

Time Machine — ‘Sparsebundle already in use’ error

A few days ago, Time Machine on my Mac reported an error: ‘Sparsebundle already in use’. Manual unmount of the Time Capsule didn't help, nor a reboot of my machine. Removing and re-selecting my Time ...
5
votes
1answer
2k views

Internet sharing without DHCP

I'm trying to setup my iMac running 10.6 to be a wireless bridge. I have it working, but I need to disable DHCP and let my network's DHCP server provide an IP for the connected device(s). I can't seem ...
5
votes
1answer
4k views

How can I limit my download bandwidth?

Sometimes, I require a lot of bandwidth but do not want to disturb other's browsing experience. At the university I'm often connected to networks for multiple users which requires me to limit my ...