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`Default Router` - The IPv6 address of the network's default gateway.
The last network configuration menu is used to configure the Domain Name System (DNS) resolver, which converts hostnames to and from network addresses. If DHCP or SLAAC was used to autoconfigure the network interface, the `Resolver Configuration` values may already be filled in. Otherwise, enter the local network's domain name in the `Search` field. `DNS #1` and `DNS #2` are the IPv4 and/or IPv6 addresses of the DNS servers. At least one DNS server is required.
DNS Configuration
Once the interface is configured, select a mirror site that is located in the same region of the world as the computer on which FreeBSD is being installed. Files can be retrieved more quickly when the mirror is close to the target computer, reducing installation time.
Choosing a Mirror
This section covers basic installation troubleshooting, such as common problems people have reported.
Check the Hardware Notes (link:https://www.FreeBSD.org/releases/[https://www.freebsd.org/releases/]) document for the version of FreeBSD to make sure the hardware is supported. If the hardware is supported and lock-ups or other problems occur, build a custom kernel using the instructions in crossref:kernelconfig[kernelconfig,Configuring the FreeBSD Kernel] to add support for devices which are not present in the [.filename]#GENERIC# kernel. The default kernel assumes that most hardware devices are in their factory default configuration in terms of IRQs, I/O addresses, and DMA channels. If the hardware has been reconfigured, a custom kernel configuration file can tell FreeBSD where to find things.
Some installation problems can be avoided or alleviated by updating the firmware on various hardware components, most notably the motherboard. Motherboard firmware is usually referred to as the BIOS. Most motherboard and computer manufacturers have a website for upgrades and upgrade information.
Manufacturers generally advise against upgrading the motherboard BIOS unless there is a good reason for doing so, like a critical update. The upgrade process _can_ go wrong, leaving the BIOS incomplete and the computer inoperative.
If the system hangs while probing hardware during boot, or it behaves strangely during install, ACPI may be the culprit. FreeBSD makes extensive use of the system ACPI service on the i386 and amd64 platforms to aid in system configuration if it is detected during boot. Unfortunately, some bugs still exist in both the ACPI driver and within system motherboards and BIOS firmware. ACPI can be disabled by setting the `hint.acpi.0.disabled` hint in the third stage boot loader:
set hint.acpi.0.disabled="1"
This is reset each time the system is booted, so it is necessary to add `hint.acpi.0.disabled="1"` to the file [.filename]#/boot/loader.conf#. More information about the boot loader can be found in crossref:boot[boot-synopsis,“Synopsis”].
Using the Live CD
The welcome menu of bsdinstall, shown in <<bsdinstall-choose-mode>>, provides a btn:[Live CD] option. This is useful for those who are still wondering whether FreeBSD is the right operating system for them and want to test some of the features before installing.
The following points should be noted before using the btn:[Live CD]:
To gain access to the system, authentication is required. The username is `root` and the password is blank.
As the system runs directly from the installation media, performance will be significantly slower than that of a system installed on a hard disk.