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116 votes
Accepted

Top level domain/domain suffix for private network?

Since the previous answers to this question were written, there have been a couple of RFCs that alter the guidance somewhat. RFC 6761 discusses special-use domain names without providing specific ...
blihp's user avatar
  • 1,301
37 votes

Top level domain/domain suffix for private network?

As always there are de jure and de facto standards. While "nonprofit" ICANN plays in politics and money we, common people, suffer. IETF once introduced .home (RFC 7788) for personal home ...
gavenkoa's user avatar
  • 882
28 votes
Accepted

Are these DNS settings a good idea or not?

Workstations should have your internal DNS server(s) as the only DNS server(s) in TCP/IP configuration PCs pick DNS server from the list and stick to it for some time. So if by some chance your ...
J-M's user avatar
  • 2,040
21 votes
Accepted

A few websites are not reachable using Linux gateway

The netmask is wrong on the enp4s1 (WAN) interface. This system has configured an IP address of 49.x.x.x and a netmask of 255.0.0.0 (prefix /8). But this is not the netmask that your ISP gave you. ...
Michael Hampton's user avatar
14 votes

Connecting hundreds of servers via the local network (LAN)

I understand how to connect a couple of servers to one server but how would I go about connecting hundreds of servers to a single server? I mean, I don't see enough ports to connect so many servers. ...
joeqwerty's user avatar
  • 111k
10 votes

Change Windows 2012 R2 Network from Public to Domain

try net stop nlasvc as admin if this works, you can set this service (nlasvc) to "start delayed"
BlackForrest's user avatar
9 votes

TCP/IP routing: accessing a LAN device with wrong static IP configuration

To be able to access the device, all you need is an additional IP address in the same network as the device which has a wrong IP. There is no need to directly attach the device to your computer. ...
mivk's user avatar
  • 4,522
9 votes
Accepted

IIS LAN and WAN separate SSL certificates for the same server

You can use single public certificate for both, external and internal clients. There is no need to use separate certificate for internal clients. Keep things simple.
Crypt32's user avatar
  • 7,142
9 votes
Accepted

What is the IPv6 equivalent of 127.0.0.1

Yes, it is 0000:0000:0000:0000:0000:0000:0000:0001 or shorter 0:0:0:0:0:0:0:1 or even shorter ::1
Daniel's user avatar
  • 7,059
9 votes

Connecting hundreds of servers via the local network (LAN)

I'm caching lots of data in memory to a local redis server. The server will need to connect to hundreds of other servers in the same data center (as they all need to access the same information hosted ...
Zac67's user avatar
  • 11.9k
7 votes
Accepted

Can a SSL certificate be used on a locally hosted website?

I would split it to two separate questions... Can a SSL certificate be used on locally hosted website Yes, SSL certificate can be used on locally hosted website. From technical point of view it make ...
Kamil J's user avatar
  • 1,717
6 votes
Accepted

File transfer speed in LAN network

The receiver side is linking at only 100 Mb/s: e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: None which translate to about 12.5 MB/s of maximum raw bandwidth. After taking into ...
shodanshok's user avatar
  • 50.9k
6 votes
Accepted

Is MS Windows known to be non-compliant to RFC3927 or did we hit a bug?

In practice Microsoft uses the full /16. "By default, the alternate IPv4 address is in the range from 169.254.0.1 to 169.254.255.254 with a subnet mask of 255.255.0.0." Configuring TCP/IP ...
Greg Askew's user avatar
5 votes

Asterisk ghost calls

It's a brute force, asterisk servers always get that kinda thing if connected to the public IP. My solutions are : Install fail2ban, fail2ban will set the iptables and reject ip with continous fail ...
Delly Fathurachman's user avatar
4 votes
Accepted

What am I doing wrong with this cat 6 patch panel wiring?

There is a lot of inaccurate and misleading information here. Even the accepted answer fails to understand exactly what happened at the punch-down block side of the cable. I am posting a more accurate ...
Mr Ethernet's user avatar
4 votes

Connecting two LANs with VPN

You can do this by putting a firewall on each LAN that acts at the default route. Each firewall can then run a VPN solution like OpenVPN or IPSec to make the two networks available to each other. This ...
Ryan Babchishin's user avatar
4 votes
Accepted

Web Application Networking: IP address or domain names?

Using domains is always a good practice as you get the liberty to replace the server without having to make any changes to your application(s). Imagine you have a web application running on a single ...
kn330's user avatar
  • 837
4 votes

How to prevent process from knowing Network is up?

Clearly, weather it is "ping" or any other program.. it is determining if a network interface is up or not before it executes it's internet command. No, it isn't. Here's (some of) the output from ...
MadHatter's user avatar
  • 80.7k
4 votes
Accepted

NAT 169.254.*.* ip address to 192.168.*.*

The IPv4 169.254.0.0/16 range of addresses is Link-Local, and it cannot be routed. See RFC 6890, Special-Purpose IP Address Registries: +----------------------+----------------+ ...
Ron Maupin's user avatar
  • 3,273
4 votes
Accepted

.htaccess: Allow all connections from local network, but require login for external

I'm assuming you are using Apache 2.4, for Apache 2.2 the syntax is different. You can add multiple Require directives: AuthName "Authenticate" AuthType Basic AuthUserFile "/var/www/html/.htpasswd" &...
Gerald Schneider's user avatar
4 votes
Accepted

How to access 127.0.0.2 3 etc to other computer/network over LAN?

Any packets with an address in the 127.0.0.0/8 range can never appear on any network anywhere. Traffic sent to an address in that range will immediately loop back inside the host. Start with RFC 1700, ...
Ron Maupin's user avatar
  • 3,273
4 votes
Accepted

DNSmasq on 2 interfaces

You need to specify dnsmasq which interface to use what network. You can do this with below change in your dnsmasq.conf file: dhcp-range=ap0,192.168.12.20,192.168.12.150,255.255.255.0,12h dhcp-range=...
ChandanK's user avatar
  • 291
4 votes

Can a SSL certificate be used on a locally hosted website?

SSL certificates can be used in a locally hosted website (I guess that means hosted on your own machines), there's really no difference with websites hosted elsewhere. You can't however get a Let's ...
Pedro Perez's user avatar
  • 6,532
4 votes

How to check for faulty device causing short outages in my LAN?

A broken device can sometime cause a network loop - received packets are just reflected back - leading to broadcast storming. In turn, these storming can deteriorate the entire network performance or ...
shodanshok's user avatar
  • 50.9k
3 votes
Accepted

Server 2012 R2 - Features on Demand - role not actually being removed

Because Install-WindowsFeature will download data from Windows Update if the required data is not available locally. For more detail, type Get-Help Install-WindowsFeature -Full and then read up on the ...
Ryan Ries's user avatar
  • 55.9k
3 votes

Top level domain/domain suffix for private network?

As of late January 2024, ICANN is officially proposing .INTERNAL: Proposed Top-Level Domain String for Private Use The Internet Assigned Numbers Authority (IANA) has made a provisional determination ...
Miles's user avatar
  • 181
3 votes

Top level domain/domain suffix for private network?

This is a useful question and the answers here are really helpful. I've gathered the main considerations as I see them: It's not a good idea to use subdomains of a publicly facing domain. Amazon.com ...
Garret Wilson's user avatar
3 votes
Accepted

Is sending "X-Real-IP" and "X-Forwarded-For" necessary for an Nginx cache running on LAN?

No, you don't need them. As a security precaution, the actual host will remove these values to prevent IP spoofing, and may use any value they choose (X- headers are custom and can be anything)
Jacob Evans's user avatar
  • 8,046
3 votes

Asterisk ghost calls

This happens due to automated scanners, which probably are trying to bruteforce your passwords. To get rid of such calls, you should disable anonymous users by placing the following options into the [...
Anubioz's user avatar
  • 3,725
3 votes
Accepted

Access local owncloud installation with a domain name

My goal is to be able to access owncloud using a sub domain owncloud.example.com/ Is this configuration possible? Yes, mostly. All you need to do is go to add an A record for owncloud.example.com to ...
user9517's user avatar
  • 116k

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