91
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 ...
- 1,051
29
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 ...
- 732
29
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 ...
- 1,910
21
votes
The challenge of connecting the network of two building
The big reason for using fibre for your buildings will probably be distance, not speed. If the cable runs will be under 100m, CAT5E will work fine for 1gbit, or CAT6a for 10gbit.
Fibre can go for ...
- 17.8k
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.
...
- 241k
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.
...
- 109k
10
votes
Surge protection for outdoor network cable run
Telco COs suffer about 100 surges with each storm due to copper wires all over town. How often is your town without phone service for four days after each storm while they replace that $multi-million ...
- 111
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.
...
- 3,707
9
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"
- 91
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.
- 6,554
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 ...
- 9,232
8
votes
LAN access with Cisco AnyConnect Secure Mobility Client v. 3.0.4235
I found a solution to my problem. I simply used OpenConnect instead of Cisco's own client.
OpenConnect (http://www.infradead.org/openconnect/) is an open source client for Cisco's AnyConnect SSL VPN,...
- 336
7
votes
Accepted
Redirect DNS requests for 8.8.8.8 to a local DNS inside a LAN
Remeber 8.8.8.8 is an anycast address. You can basically do the exactly same thing Google does for maintaining one of their boxes that serve the 8.8.8.8 traffic.
Assign the IP address 8.8.8.8 as an ...
- 130k
7
votes
Captive portal popups: the definitive guide
All mobile OS just check a web page to decide whether they're behind a captive portal or not.
The mechanism is this:
GET/POST http://foo.com/bar.html
If bar.html == [expected content] > Open ...
- 201
7
votes
Accepted
IPv6: No NAT / Local Addressing + ISP Offline
You have a lot of options here.
One of the assumptions baked into IPv6 is that everything is probably going to have several IP addresses. At the outset you have the link-local addresses (the fe80:: ...
- 132k
7
votes
What IP to use for self-testing?
To add to Michael Hampton's suggestion, Windows should recognize %computername% as an environment variable, which you can ping, etc.
It looks to me like the PowerShell cmdlet Test-NetConnection ...
- 18.6k
6
votes
Accepted
Apache can't change listening IP-address
Apache won't bind to your VIP because it is not configured on any network interface.
To allow this to happen, you need to set a sysctl:
sysctl net.ipv4.ip_nonlocal_bind=1
Apache can then do the ...
- 241k
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 ...
- 45.5k
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 ...
- 35k
6
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 ...
- 1,627
5
votes
Accepted
Track Source IP of dropped packets
Using nmap you can get a variety of information about your network including, and it can be incredibly useful for tracking packet loss. The --packet-trace option can be useful for tracking all of the ...
- 2,751
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 ...
5
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
- 6,878
4
votes
How to route different traffic thru different network interfaces (in Windows)
Changing metrics sure is better solution than deleting any of the default routes. It's also robust, since on disconnect you'd still be able to access the internet via the corporate LAN without ...
- 44.8k
4
votes
Accepted
Extend wireless LAN with several access points?
It is sufficient to give all the APs identical wireless settings (SSID, password, security, protocols), but different channels.
That way, as long as you have the APs on the same physical network (and ...
4
votes
Accepted
Where should the preferred DNS server be in a LAN?
You're over thinking things a bit, but your basic understanding is correct.
You should have at least two Domain Controllers (in your scenario two should be sufficient).
The Domain Controllers should ...
- 109k
4
votes
Accepted
How to merge usb0 and usb1 interfaces into one network?
What you need is to configure bridging. What bridging will do, is basically tie together a bunch of interfaces, and then letting the computer running the bridge act as a switch. The IP address is ...
- 2,615
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 ...
- 6,210
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 ...
- 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 ...
- 79.2k
Only top scored, non community-wiki answers of a minimum length are eligible