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

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Windows Remote Desktop Connection

I have a Windows Server 2012 and I can currently connect to it via the built-in Windows remote desktop software. I enter the server IP and password and all is fine. However, I was wondering what I ...
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1answer
38 views

send udp packets to a destination via forwarding

i have linux machine A ( 128.247.19.194, netmask 255.255.254.0) linux machine B ( 128.247.19.165 netmask 255.255.254.0) And another linux machine (128.247.19.3 netmask 255.255.254.0) There is a ...
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2answers
92 views

Connect two servers with RJ-45 cable and iptables (without switch!)

I have two servers and server_1 is connected to INTERNET port (of server farm) at eth0. No switch. They connected with cable from (server_1)eth1 -> (server_2)eth0 : ifconfig of (server_1): eth0 ...
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3answers
171 views

Determine if an IP is from hosting provider, or normal ISP? [closed]

I know this problem is not fully answerable, and will probably never be 100% solvable. But I am looking for ways/techniques to determine if an IP is belongs to a normal home/business user, going ...
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2answers
139 views

Web service listen on Public and Private IP address

I'm trying to get some applications of ours to listen on the Public IP address of the server. Due to the complex nature of these systems we cannot change the behavior of the applications or what IP ...
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1answer
776 views

How would I create a IP whitelist for tomcat?

I'm extremely new to tomcat but I need to configure my company's tomcat server so that we can allow restricted IP addresses only. I understand this is normally the job of the firewall but in this ...
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1answer
213 views

DNS and IP Configuration for Windows Server 2012 DC

I am getting these errors: SERVER Error DNS: DNS servers on vEthernet (Intel(R) 82567V-2 Gigabit Network Connection - Virtual Switch) should include the loopback address, but not as the first ...
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1answer
127 views

Proxy / IP clouds, how do companies acquire them?

I have seen a number of companies providing proxy clouds or IP clouds, whereby each of your web requests ultimately goes out through a random IP/proxy. You send your request to their IP and they ...
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2answers
119 views

Socks proxies over SSH show same IP

I have recently been setting up proxies via SSH on my VPS and when I connect the non main IP via a browser and look at my IP, it shows up as the main IP, is there any way i can fix this? For example, ...
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1answer
70 views

One Domain, One publish IP, Multiple servers

Apologies in advance for being a total newbie with all things infrastructure related. A little background: I'm developing a server app for an Android application. The app will communicate with the ...
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1answer
73 views

Multiple IP's per domain name and route to fastest available server?

I'm not very familiar with NameServers. Where can I find information or how can I set up multiple servers with different IP's to use the same domain name, such that the client connects to the ...
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0answers
51 views

KVM Networking guest issue due a provider networking limit

I have a KVM setup on Centos 6.4 64 Bits. My server provider assign us a Main IP to the Host with a gateway and netmask. Also our provider assign us additionals IP ( not in the same block as the Main ...
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3answers
58 views

Assign IPs to programs/processes

I need to assign different IP addresses to different processes (mostly PHP & Ruby programs) running on my Linux server. They will be making queries to various servers, including the situation ...
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2answers
70 views

What is this router's IP address(es)? [closed]

What is the IP address(es) of the router in my picture? In my picture, you can see that I have question marks next to the router's interfaces, because I'm not sure if those are right. Can someone ...
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2answers
65 views

Do orgs that own IP blocks even use all (or most) of it? [closed]

I recently learned that the IANA assigns blocks of IP addresses to certain entities, usually commercial and government organizations. Here is a link to the assignments: ...
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4answers
86 views

Cannot access IP address on server after 3 days of waiting

A client of mine who hosts their websites with Hurricane Electric added a dedicated IP address to 2 of their accounts, three days ago. However, I am unable to work on their website as the dedicated ...
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2answers
219 views

ip route get recognizes address as anycast

# ip route get 1.2.3.4 anycast 1.2.3.4 dev eth0 src 5.6.7.8 and the question is how does it know the address is an anycast ? (which apparently is true). UPDATED: Present as anycast route: ...
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0answers
55 views

Restrict DNS Resolver to specific IP Ranges

I'm running a Windows Server 2012 R2 for DNS. Is it possible, to allow normal DNS Requests for everyone whilst restricting the Resolver Service to a specific range of IPs? We tried it with the ...
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2answers
513 views

Possible to emulate an IGMP querier in software?

I have a L3 switch that does IGMP snooping, but it cannot act as an IGMP querier, and there is no IGMP querier connected to this network. Would it be possible to implement an IGMP querier in ...
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0answers
59 views

EC2: Persistent IP/Host for internal communication

I have a few servers on EC2 which intercommunicate using a RESTful interface. Currently, the addresses are saved in a configuration file which lists explicit IPs. This is prone to errors, because it ...
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0answers
173 views

Can I change venet0:0 main ip to venet0:1 ip?

I would like change my main IP from venet0:0 to venet0:1. Is this possible? This is my ifconfig: [root@marketport tmp]# ifconfig lo Link encap:Local Loopback inet addr:127.0.0.1 ...
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votes
1answer
100 views

How can my server announce its presence to everyone in the network [closed]

The situation is as follows. I want to have an application running on a server. All of the desktops in the company has to connect to it. But I do not want the IP address of the server to be hard coded ...
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1answer
209 views

DNS caching for a DNS name with two different IP addresses (internal vs. external)

Suppose we have a DNS entry ocean.corp.tld internally pointing to an internal IP address on our corporate network, and externally pointing to an external public IP address. Essentially same DNS name ...
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1answer
1k views

Out of IP address on DHCP 192.168.1.2 to 192.168.1.254 [duplicate]

Hi I have 250+ workstations on IP's from 192.168.1.3 to 192.168.1.254 subnet 255.255.255.0 gateway 192.168.1.1 and our server on 192.168.1.2 We are expanding and need to add another 254 IP's but this ...
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1answer
1k views

What IP range do I ask the system administrator to open in order for S3 to work?

I've written some programs for Raspberry Pi, which some small companies have shown interest in. I sold pre-configured Raspberry Pi:s to them, with my program on them, and it works for everybody except ...
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2answers
30 views

Does it seem from NAT when they really come through a proxy?

Just question. When a client really come through a proxy, can we tell it from being through NAT?
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1answer
45 views

choosing network interface based on network purpose [closed]

i have 3 NIC with ip address 10.10.10.2-eth0, 10.10.10.3-eth1, 10.10.10.4-eth2 An NFS server with IP 10.10.10.5 and want this NFS share to be accessed only through 10.10.10.3 that is through eth1 ...
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2answers
82 views

Can a cisco router execute a command itself?

I'm experiencing a problem with my Cisco router 1900 Series, the router sometimes stop routing packets, and when i log into it and show the running-config i see no ip routing executing ip routing ...
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2answers
50 views

Clients on Local Network — simple test?

I am developing a web system for my school (it's in PHP, but that's not important). The system needs to have different behaviors depending on whether or not the user is on the school network ...
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1answer
189 views

allow machine to access localhost website

I've got some IP rules on an Azure VM, the first blocks all traffic, the second allows my laptop to access the website. Both work fine, however when I try to access a website hosted on the VM locally ...
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1answer
2k views

Make sshd listen to a specific interface

On my machine I'm using OpenVPN which use the tun0 interface. I want sshd to listen only on this interface. I know, I can specify the IP address to listen to in /etc/ssh/sshd_config with a ...
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1answer
202 views

How to know if iptables rules work? [closed]

I'm implementing a IP Rotation for my SMTP Server using iptables, how would I know it work? This is the rule I use. iptables -t nat -I POSTROUTING -m state --state NEW -p tcp --dport 80 -o eth0 -m ...
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3answers
6k views

Change ssh port for specific ip address

I get the trouble with putty, so I prefer using shell( linux) to access server via ssh, my ip address has alter port for ssh is 6091, so is there anyway to access server via ssh by command ssh ...
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3answers
269 views

Get IP network range after reverse DNS?

For analytics purposes, I'm looking at large sets of IP addresses in server log files. I'm trying to perform reverse-DNS lookups to understand where traffic is coming from - e.g. what percentage of ...
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2answers
94 views

migrating site to new ip - some computers still see the old site

I have moved the site domain.com from ip.1.1.1 to ip.2.2.2. I have changed the A records in bind on the DNS. My local DNS is set to google's (8.8.8.8, 8.8.4.4), so for me, the issue was resolved in ...
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2answers
557 views

Force an LXC container to use its own IP address

Sorry if this question has already been asked. I could not find it, I have this setup : +---------------------------------------------------------------------------------------------+ |HOST ...
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0answers
74 views

All nework interfaces hang for seconds while one interface goes up/down

I am building a client/server application that uses several network interfaces in parallel for redundancy, and I have noticed that while one network interface goes down or goes up, the communication ...
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2answers
58 views

ip recognition is different

some months ago i bought a dedicated server from usa (http://www.dacentec.com/) datacenter. my ips are look like this : 162.248.243.blo blo blo when i check my ip in this site : ...
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1answer
88 views

Multi domain server with dedicated SSL's HA

I am hosting a server with 150 domain names (websites), each of the ssl's requere dedicated IP address. So server windows 2008, with 150 IP addressees and 150 websites. I need to have high ...
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40 views

Using NAT with iptables between corporate network and firewall'd corporate network

At work we have a firewall between two networks. I was told they opened up the two ports for me but I needed to modify the IPtables to allow packets to go through. I'm not familiar with the correct ...
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1answer
229 views

How to run a website domain without redirecting if IP is already used for another website? [duplicate]

I bought a VPS Host that gave me only 1 IP Address which I used on my first domain name and it works without any problems. Now my second domain name I can't use the same ip address as it points to ...
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0answers
375 views

ZNID24xx-Router public IP

I need to make my public IP the same as my internal one. My router is ZNID24xx-Router, and i'm trying to change the config of port forwarding, but i'm not certain this is the right thing to do and i ...
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0answers
100 views

heartbeat doesn't work on virtual interface

I try to use vertual interface as broadcast for heartbeat(bcast in ha.cf). When I try it I see this message in syslog: May 23 12:17:26 Ubuntu2 heartbeat: [1107]: ERROR: glib: Error setting socket ...
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1answer
67 views

IP Forward at router

Is there any way to set a router to simply redirect all traffic to another wan IP address? For example, I have a static wan ip of xx.xxx.xxx.123 and I want to forward all traffic to xx.xxx.xxx.124 ...
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3answers
462 views

What happen when I assign 2 IP on one NIC? [closed]

What happen when I assign 2 IP on one NIC? e.g. I have one physical NIC (eth0) and I assign on this interface 2 IPs from different network. e.g. auto eth0 iface eth0 inet static address ...
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1answer
133 views

Why does IPTraf show multiple MAC addresses for my interfaces?

Hopefully a simple question with a simple answer. I thought each NIC had a single MAC address. However, as can be seen from the IPTraf output below, I have multiple MAC addresses for both my eth0 and ...
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5answers
3k views

Static ip using a router and DHCP [closed]

I have been trying to understand and achieve assigning a static IP address to my machine, while being connected to a router (WiFi) and using DHCP. My scenario is thus simple, but I think I missing ...
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1answer
100 views

i2b2 VM: Copy VM won't give me a valid IP address

After downloading a VM image and making a copy of it, I tried booting up both of them on the same Windows workstation using VMWare Player. I am unable to get an IP address for the second one in my ...
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6answers
266 views

How can I ssh to a firewalled server without a static IP?

I need to SSH into a client server that has an IP whitelist as part of access control. I don't have a static IP - sometimes I work from home, sometimes the library, sometimes a coffee shop, etc. How ...
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1answer
209 views

Using DHCP, is it possible to obtain an IP address & MAC address for a cluster? [closed]

I know that DHCP assigns IP addresses, but does it also assign a MAC address? Is this a commonly used paradigm for cluster/cloud computing? Perhaps DHCP could be used to dynamically assign a new IP ...