How To Check Apple IP Settings

The Functioning of Internet Addressing When using the Internet, individuals are assigned either a Public IPv4 address, such as 179.117.232.125, or an IPv6 address, like 2000:929a:dcec:c41d:6d60:7980:e92d:49a9. These addresses can be verified using the test-ipv6.com website. However, for those who are not knowledgeable in technology, relay these addresses, or even mention MAC addresses, it can quickly become complicated and prone to errors. The Functioning of Internet Addressing When using the Internet, individuals are assigned either a Public IPv4 address, such as 179.117.232.125, or an IPv6 address, like 2000:929a:dcec:c41d:6d60:7980:e92d:49a9. These addresses can be verified using the test-ipv6.com website. However, for those who are not knowledgeable in technology, relay these addresses, or even mention MAC addresses, it can quickly become complicated and prone to errors.

The Functioning of Internet Addressing

When using the Internet, individuals are assigned either a Public IPv4 address, such as 179.117.232.125, or an IPv6 address, like 2000:929a:dcec:c41d:6d60:7980:e92d:49a9. These addresses can be verified using the test-ipv6.com website. However, for those who are not knowledgeable in technology, relay these addresses, or even mention MAC addresses, it can quickly become complicated and prone to errors. It also lacks the ability to provide historical data, especially for past issues.

Accessing a website, such as https://white.io, involves contacting a DNS server to convert the host section (white) along with the Top Level Domain (io) of the URL into an IP address, such as 186.156.99.201. Your computer and web browser includes its specifications in all web requests, for example:

Opera/9.80 (X11; Linux i686; Ubuntu/14.10) Presto/2.12.388 Version/12.16

The Significance of Default Gateways

The default gateway is usually an address that is automatically configured through DHCP. This address, such as 172.24.38.169 (typically ending in .1 or .254 based on the scope size), is the location where your computer sends all of its traffic to be routed further. For those using IPv6, more detailed information can be found in our blog post titled: how-to-fix-ipv6-connectivity/ but you can also check on Mac or Linux by using the following command:

```bash
command

IPv4 Routes and the Host IPv4 Route Table (inc. VPN)

netstat -rn -f inet | egrep -i "default|0/1|128.0/1"

0/1      172.18.12.193  UGScg  utun3
default  172.24.38.169    UGScg  en0
128.0/1  172.18.12.193  UGSc   utun3

Note: We are not just looking for the default but also for any VPN that overrides the public v4 address space.

IPv6 Routes and the Host IPv6 Route Table (inc. VPN)

netstat -rn -f inet6 | egrep -i "default|2000::/3"

If you have IPv6 active the above should return at least one route (as per below) via a known interface such as “en0 " on a Mac.

default   fe80:eb05:361a:583a:1aed%en0  UGcg   en0
default   fe80::%utun0                   UGcIg  utun0
default   fe80::%utun1                   UGcIg  utun1
default   fe80::%utun2                   UGcIg  utun2
2000::/3  utun3                          USc    utun3

Note: We are not just looking for the default but also for any VPN that overrides the public v6 address space.

Debugging DHCP for both IPv4 and IPv6

To get a look at the low level DHCP configuration (Mac/Linux):

ipconfig getpacket en0

...
domain_name_server (ip_mult): {144.192.190.163, 170.46.1.247}
end (none):
...

So, in the above we are not getting IPv6 DNS servers from the DHCPv4 reply but…

ipconfig getv6packet en0

DHCPv6 REPLY (7) Transaction ID 0x80940b Length 76
Options[4] = {
  CLIENTID (1) Length 14: DUID LLT HW 1 Time 668691856 Addr 63:8d:69:97:02:10
  DNS_SERVERS (23) Length 32: 2606:4700:4700::1111, 2001:4860:4860::8844
  DOMAIN_LIST (24) Length 0:  Invalid
  SERVERID (2) Length 10: DUID LL HW 1 Addr 5f:73:b6:96:52:0b
}

Fixing Connectivity Issues in Wired or Wireless Networks

When it comes to transmitting data at the physical and data layer, you may be utilizing either a wired or wireless (Wi-Fi) medium to convey this data to your router.

Troubleshooting Tips for Apple macOS / OSX Users

Regardless of the version of OSX/macOS you are currently using, whether it’s 10.14.6, 11.6.5, or 12.3.3, there are various tools available for troubleshooting. However, these manual interventions and scripts lack the ability to provide a series of correlated values over time. This is where automated remote troubleshooting becomes incredibly useful, especially for teams that have adopted remote work and Work From Anywhere (WFA) practices.

Useful Built-in Command Line Tools

An extremely useful tool for OSX/macOS users is sudo wdutil info, which provides a dump of the current wireless settings to the command line interface, and can also be configured to generate specific logs for troubleshooting purposes. Moreover, the sysdiagnose tool can be used to produce a wide range of logs, although much of it is limited to point-in-time information in relation to wireless issues, like wdutil.

To run the sysdiagnose tool in the background and have it write logs to /var/tmp/<blah>.tar.gz, you can use the following command: sudo nohup /usr/bin/sysdiagnose -u &. If you prefer to run it interactively, you can execute sudo /usr/bin/sysdiagnose, which will also prompt a privacy warning. When run in the foreground, it should open Finder in the correct location, or you can navigate to /var/tmp using Finder with Cmd+Shift+G. Keep in mind that the file sizes are usually around 300MB.

Possibly Helpful Videos

Video Title Channel
Mac Activity Monitor - How to Troubleshoot Your Mac Hands-On Mac
Secret Mac Boot Commands - Mac Boot Key Combinations Hands-On Mac
On the Road to Big Sur 2 - Compatibility Hands-On Mac
macOS Big Sur - What's New in Apple macOS 11 Hands-On Mac
Securing macOS Big Sur Hands-On Mac
Table 1.0 - Video Help



P.S. Tips For Remote Network and Client Support

Digital work requires reliable connectivity. Whether for low latency or regular data streams, Wi-Fi, DNS, and network issues cause teams to lose time and productivity. Even worse is when support teams waste time trying to recreate and isolate issues! See how PanSift saves time, money, and frustration on all sides with instant remote troubleshooting 🏠🏝🛰.

Design Benefits + 2 Free Agents


Install on any mobile or stationary Mac for immediate visibility.

Click for a frictionless and instant live demo

2x free agents for problem machines and upgrade for more!

Click for a frictionless and instant live demo

Install as remote sensors at any site or location!

Rapid Digital Experience Monitoring for teams, clients, and sites!

Instant Agent

2 x free macOS agents

Instant Demo

No registration, immediate live demo!