IP - Internet Protocol, the most commonly-used set of rules for dispatching data across a large computer network.

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-6
votes
1answer
100 views

Get a static internet ip address [closed]

Whenever my router goes off my IP gets constantly changed, which is not favourable when running an online service. How can I prevent this from happening?
-2
votes
2answers
866 views

How to generate a Self Signed SSL Certificate bound to IP address? [duplicate]

I have my application hosted in the cloud and while demoing to prospective clients, I would like to make sure that my browser doesn't complain due to the lack of trust. So I want to generate a self ...
2
votes
1answer
74 views

Difference between ip link eth down and ip link dev eth down

What's the difference between ip link set eth0 down and ip link set dev eth0 down ? The difference between the commands does not appear to be documented anywhere.
0
votes
0answers
17 views

Is there an easy way to monitor another domain user's processes and IPs these processes are contacting? [duplicate]

Is there a way to monitor which IPs the startup processes of another domain computer is contacting as a user logs in? Both person logging in and person who will be monitoring are domain admins. Short ...
-1
votes
1answer
62 views

Is there a Universal/Generic Default Gateway Address in IPv4? [closed]

Is there a universal and/or generic default gateway address in IPv4? I'm looking for something similar to the way you can always reference a NICs IP address from itself with 127.0.0.1 regardless of ...
0
votes
0answers
154 views

Does netfilter reassemble IP fragments when packet is forwarded?

IP datagram should be reassemble in the termination of the path because the fragments may arrive from different paths. I think Netfilter need to reassemble a IP datagram to inspect the whole payload ...
0
votes
2answers
73 views

Private Network Interface between to MacOSX servers

We would like to set up and private single cable connection between two Mavericks servers, that also need to talk to the rest-of-the-world. The two servers for sake of argument are DB and Web. There ...
0
votes
1answer
47 views

Is there any solution to change the source IP from outgoing WAN A to receiving WAN B?

I am configuring a office router for crossing the GFW in China. I want to use WAN A(actually a low bandwidth VPN tunnel) only to send package to target servers (YouTube for example). And change the ...
0
votes
1answer
37 views

IP route not on default gateway

I am trying to setup a network that is only accessible if you go through the '10.222.3.1' switch. It is a test environment that we do not want interfering with our production environment. The trouble ...
-2
votes
5answers
266 views

What happens if ISPs mess up IP allocation?

I've been wondering about this for a long time but never really got around to asking it. I know that a lot of companies were initially assigned IP addresses within the /8 (Class A) range and a lot ...
0
votes
1answer
43 views

Telnet, Startech, and a Transmitter

I'm at a bit of a loss and will also preface by saying that I have very little experience working with Telnet. I have Startech Serial over IP 'webserver' setup, everything seems fine on this end. Next ...
0
votes
1answer
81 views

Connect remotely to an APIPA assigned host

I had the unfortunate (and not correctly planned) event of having one of my remote Hyper-V hosts assigned an APIPA address hence i cannot connect by any means on it. Funny thing is, i can RDP to the ...
-1
votes
1answer
56 views

AWS Multiple Elastic IPs to one instance

I need some guide to lead me to setup multiple (6) ips for 6 websites (1 ip - 1 website) on one instance. or what to look for I have found this http://www.ec2instances.info/ If it is true I need t2 ...
0
votes
1answer
117 views

Postfix configure a gateway to outbound emails

I have a server configured with Postfix in my business office. I have another server at a hosting provider that I want to send all my outbound mail through. How can I do this. The only way I know its ...
0
votes
0answers
86 views

opensm infiniband route table

I have two centos 6.6 vmware vms. VMware is told to do a bridged network and to replicate physical network. eth2 is dhcp managed by NetworkManager. I am able to get to the point where I can assign ips ...
0
votes
0answers
30 views

Support for UDP-Lite

In order to be effective, UDP-Lite requires the link layer to disable its frame CRC check for frames carrying UDP-Lite packets. Are there any deployed link layers (Wifi?) that implement this explicit ...
2
votes
2answers
924 views

Windows firewall, netsh, block all ips from a text file

am using the following scrip to block ip's from a text file into the windows firewall. I'm using windows 2008 R2 @echo off if "%1"=="list" ( netsh advfirewall firewall show rule Blockit | ...
0
votes
1answer
161 views

Redirect subdomain to an Apache Virtual Host

I have a website "example.com" hosted on a provider that allows me to manage my own DNS. I want example.com to point to the provider's IP address but I want "subdomain.example.com" to point on my own ...
-4
votes
1answer
27 views

is host id size of IP address will vary between the private and public networks? [duplicate]

I understood that size of host id in the class c network is 8 bits(1 Octet) Classful network After started exploring about private networks, in the below link Private network The host id size of ...
-6
votes
2answers
43 views

Call a server Ip simulating domain name [closed]

in order to migrate my domain name to my new server, I would like to test it with real domain name. I think we can call Ip server giving as argument domain name ? How can I do that ? Something like ...
0
votes
2answers
787 views

Apache module RPAF documentation? [closed]

I installed libapache2-mod-rpaf package on Debian because mod_remoteip seems not available. I cannot find any documentation about this module. I found a github repo but the configuration options are ...
1
vote
2answers
277 views

How is a TCP request routed from a virtual machine to an outside resource and back again?

Scenario: Computer A has a local ip of 192.168.1.100, which is running a VM inside of it. The VM now makes a tcp request to an external IP address (74.125.225.98). Could someone explain how the ...
2
votes
2answers
560 views

Assign multiple IP and Gateway in Ubuntu Server

I'm trying to find an option to add/assign multiple IP addresses and Gateways to the Ubuntu Server. The reason behind is, I want to access devices from two different networks. For instance I may want ...
0
votes
0answers
81 views

openVPN on another IP

I had a working OpenVPN on my server, and it was working fine, redirecting traffic to the/from the internet, but when i have found that the traffic to the services on this server not routing through ...
0
votes
1answer
107 views

What is the best way to redirect a user to another server and domain and keeping the URL intact?

I suddenly have a client who doesn't understand much in programming. So the best solution in this case would be - to run the app on my server while keeping his domain under his control. He has there ...
0
votes
1answer
103 views

Client not routing through CentOS7 OpenVPN

I recently setup a server on digitalocean, i setup the vpn server key etc and i can connect with my client, the problem is that if i connect and i google for my public ip adress that i don't get the ...
0
votes
0answers
306 views

Nanostation M5 Point to Point, SOHO Router IP Addressing

I have two sites both with Line of site from each other. Each of the two sites has a Draytek 2830 on site with an ADSL connection. I have a pair of Nanostations which I want to setup on the Ethernet ...
-2
votes
1answer
42 views

Online tool to calculate IP mask [closed]

I know there are so many tools to calculate a network range starting from an IP and its mask (192.168.1.0/24) but do you know an online tool to calculate the mask starting from first and last IP ...
0
votes
2answers
845 views

How to use pfSense as a firewall in order to assign url whitelists to IP groups

In a corporate network without DHCP, the temporary solution to whitelist a couple of useful sites is to change the hosts file under Windows/System32/drivers/etc/ but since modern sites tend to change ...
0
votes
1answer
129 views

How can I get a report of all MAC addresses nearby? [duplicate]

I am trying to get an idea of how to get a list of all the MAC/IP's near my network. I've tried arp -a commands (What I found from some previous searching.) but those are not showing any of the ...
1
vote
3answers
3k views

Ubiquiti Unifi Wirlesss Access Point not obtaining IP Address when VLAN Tagged

This question follows on from this one which I managed to resolve. Draytek 2830, Multiple VLANS on Same Port My Ubiquiti Unifi Wirlesss Access Points are not allowing clients to obtain an IP address ...
0
votes
1answer
204 views

Debian Bridge Network Connection — Static IP Addresses

I have a PC with 3 Ethernet ports. I am able to share internet to the other two ports with internet coming in on eth1. I use the following setup on /etc/network/interfaces after aptitude bridge-utils ...
0
votes
2answers
595 views

Draytek 2830, Multiple VLANS on Same Port

The Kit Ubiquiti Unifi Long Range Wireless Access Point Cisco SG200-08P Switch (VLAN, POE Support) Draytek 2830VN Router The Problem I need to enable Multiple VLANS against a single port on the ...
-1
votes
1answer
47 views

IP Network Best Practice [closed]

On my On Premise network we use IP Span 172.17.101.0-172.17.103.254 I should now connect our Windows Azure network to the On Premise network using VPN. Is it okay to use IP Span 172.16.1.0 in the ...
1
vote
0answers
40 views

Double IP forwarding not working

I have the following 2 debian servers in my scenario: The first one is my main openvpn server, it has 2 NICS active eth0 (172.25.156.146) and eth3 (172.26.16.1) - The second server has also 2 NICS ...
0
votes
2answers
766 views

IIS Website access by both hostname and IP address?

If I set up a website in IIS with a hostname (local.somewebsite.com) (having added it to HOSTS file) and also specify an IP address (127.0.0.1), the website is accessible by the hostname, but hitting ...
0
votes
2answers
559 views

CentOS, How to allow SSH through only one server-ip [closed]

I currently have a dedicated server with two pv4 IP addresses assigned to it. I want to make one public, and the other private for SSH/FTP related material. IP 1 (The public ip): 192.23.6.11 IP 2 ...
-1
votes
1answer
84 views

force use of specific ip when talking to specific host

I have a server with multiple interface alias running debian. lets say eth0 eth0:0 and eth0:1 I'm looking for a simple solution, when connecting to host 1.2.3.4 (or host range, would be better) that ...
0
votes
0answers
125 views

Change vlan settings to Yealink phones at once

I have about 90 yealink ip phones. My target is to change vlan settings to all of them massively. For example, when it's going to reboot all of them, I run the following ...
0
votes
1answer
103 views

How does an IP address goes down from an Application Layer to IP Layer? [closed]

Using the classical TCP/IP layers model, I am thinking about an application (for example a browser) acting as a client wanting to talk with a server (e.g. a web server). Of course it has to use the ...
1
vote
1answer
125 views

Linux VPS settings to allow $_SERVER['REMOTE_ADDR'] to get client ip [closed]

I have unmanaged VPS server. I am trying to get client IP form PHP $_SERVER['REMOTE_ADDR'] but it's always gives me same for all users that is server internal IP. I have done some R & D and got ...
0
votes
1answer
46 views

How to get the maximum details from a remote host and forcefully get a particular IP?

I have setup a Ubuntu server(xxx.222.4.216) for our Redmine tool and recently we got a IP conflict in the machine and now im unable to get back the IP(xxx.222.4.216). I would like to know if there is ...
0
votes
1answer
56 views

ip route command with source option

I have multiple interfaces on my system catering to different subnets. I also have a pseudo interface which is a p-to-p driver for tunneling packets. I was trying to add routes using ip route command ...
0
votes
1answer
373 views

Ports needed for IP Subnet discovery Kaspersky Security Center 10

I'm trying to discover computers based on IP subnets. The administration server is not part of the same workgroup or active-directory as the clients, so this is the only way to do it. I can ...
2
votes
1answer
1k views

How to find out IP address held by a Windows DHCP client yesterday?

We have a Windows Server 2008 with DHCP server running. I can see the current leases and reservations, is there a way to see the status of yesterday (or at least what IP a particular client had ...
1
vote
1answer
127 views

Ip-in-Ip tunnel not working — Packets not being decapsulated

I am trying to forward packets from HostA to HostB using ip-in-ip tunneling. While packets are reaching their destination, they are not being decapsulated by the receiving host, and thus being dropped ...
-1
votes
1answer
73 views

What use are systems that ban IP addresses if all the evildoers spoof them anyways

Many anti-spam or web applications with a security component give the ability to ban IP addresses. In my experience any bot, person or other entity that is truly nefarious is using an endless supply ...
5
votes
1answer
152 views

POST of MTU + ~798 bytes gets lost

I have a very weird issue with certain packets not arriving on the destination host. It happens when we transmit a POST that is somewhat larger than the MTU. We can reproduce it with this script: ...
3
votes
0answers
84 views

How do large SaaS providers support A records? [closed]

According to RFC 1035 CNAME records cannot be used used in a zone apex because a CNAME record cannot exist alongside records such as SOA. This is frequently a source of frustration for those trying ...
0
votes
0answers
53 views

Source ip based Anycast-BGP?

I'm just getting interested in networking so don't be too harsh on me :) Ideal: 2 servers with shared ip; ip X Client 1 pings ip X > always server A Client 2 pings ip X > always server B ...