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

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1answer
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Static route to Single IP using SSL connection

I am trying to configure a static route to a single IP. My question is two fold: How do I specify a single IP using a subnet mask x.x.x.x/? (not a range of ip's) My pc is making an SSL connection to ...
14
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2answers
2k views

Pinging an IP address responds with different IP

When I try to ping the IP address 10.10.208.57 I have no response since nothing exist in the network with that IP address. However if I try to ping 10.10.208.057 instead another IP address responds: ...
-1
votes
1answer
26 views

Local and Private IP Issue on Wamp Server [on hold]

I'm having some problem regarding wamp server and my IP Address. In our company we have a machine that has a LOCAL IP of 192.168.x.xxx so basically we have wamp installed on it and every PC on the ...
1
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2answers
33 views

Release old IP and redirect user to new IP

I have a device that can be accessed over a local network in order to configure the device. One of the settings is to change the IP address of the local interface. The problem is that when I change ...
0
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2answers
1k views

Adding a static route to a virtual interface using configuration files rather than ip command

We statically assign our routes using the /etc/sysconfig/network-scripts/route-ethx files. This makes managing them fairly easy since we add the routes during the kickstart process (by way of ...
1
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3answers
6k views

How Do I Block an IP Address on ubuntu?

I have configured Ubuntu machine as router. Steps of NAT configuration are given below: #iptables -F #iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE #iptables-save ...
41
votes
7answers
27k views

What is “anycast” and how is it helpful?

I'd never heard of anycast until a few seconds ago when I read this SF post. The wikipedia entry on it is quite formal and doesn't really evoke a mental picture of how it would be used. Can someone ...
1
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2answers
1k views

SBS 2008 DNS issues in BPA

I'm gettng constant Critical Issue events in the Small Business Server Best Practices Analyser & resulting SBS Console reports that begin "The DNS client is not configured to point only to the ...
4
votes
3answers
7k views

How do I configure a subdomain to point to a different IP from GoDaddy

Simailar to this question, I want to configure DNS hosted with GoDaddy to have a subdomain on a different IP from the root site. The issue I am having is that GoDaddy uses a GUI and does not grant ...
1
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3answers
2k 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 ...
2
votes
1answer
4k views

ping works but ssh fails

machine1 IP: 172.30.11.119 machine2 IP: 172.30.11.120 machine3 IP: 172.30.11.121 machine4 IP: 172.30.11.122 Note: These machines are connected to LAN. I have configured the static ...
0
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1answer
34 views

How will the LAN to LAN firewall rule affect the traffic in the rest of the network

I have a following network setup (of course a bit modified from the real situation) I would like to setup a LAN to LAN rule on the ZyWALL firewall so that only certain ports/ip adresses are allowed ...
0
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1answer
26 views

Enlarge IP Network Address Space

Our small company uses a 192.68.0.0/24 network. As there are only 256 IP addresses, we will be running out of IP addresses soon. I wonder about the best strategy to change the network. Some devices ...
0
votes
2answers
48 views

Access internal ip (home server) through double NAT (router + ISP) [closed]

I have home server (debian-like machine) inside my wifi-network. I wan't to access it over http (for transmission-daemon web interface) and over ssh (to administrate it). The issue is that there are ...
0
votes
1answer
107 views

Can a source send two fragmented IP packets at the same time?

I'm developing an app that does NAT between a virtual TAP interface and a physical interface, and I'm not sure how much buffer should I allocate for IP fragmentation. According to Wikipedia the ...
0
votes
1answer
32 views

Force a traceroute to go through added IP address

Currently speaking I am on a linux (debain) machine which has 2 routed public IPv4 address: 1.1.1.50 1.1.1.60 Both of these IP addresses are currently simply added as a vitual host: 1.1.1.50 -> ...
0
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1answer
35 views

Hide OpenVPN client's IP

Is it possible for a OpenVPN server letting clients communicate with one another and they do not know other's IP in VPN? My VPN server is ubuntu 14.04 32bit
1
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0answers
42 views

Hyper-V, Subnet Masks, External IP Addresses, Hetzner [closed]

I am pretty new to this so I am going to try and explain this as best as I can. All Servers I have dealt with in the past have always had an internal IP address, the external access has always been at ...
0
votes
2answers
70 views

First and last IP address of the network 192.168.176.0/23 (subnet 23) [duplicate]

Let's have the following address of the network: 192.168.176.0/23. What are the first and last IP addresses of this network? Following this answer http://serverfault.com/a/327782/288201 I assume ...
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votes
2answers
109 views

How to figure out why sites on my server aren't loading? [closed]

I seem to randomly receive "page cannot load, cannot connect to server" errors for sites on one of my servers. when this happens, it seems to only happen on certain IPs or IP ranges at a time. I say ...
5
votes
2answers
324 views

One IP address, two different countries [closed]

I was using multiple websites to determine the geolocation of an IP address, and ended up getting two different countries (on the same continent). What is the reason behind this?
1
vote
1answer
28 views

Website unavailable outsideLAN and randomly times out inside

Just as the title states. The website is not reachable from outside our network, and random computers inside the building timeout for a couple minutes and then are back up. For the computers inside ...
1
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0answers
44 views

IP-rules don't seem to be working on CentOS-6.6

I faced a bit odd difficulty with policy-based routing on CentOS-6.6 server. I have a setup where I need to enroute all packets originated from 172.25.0.0/16 destinated to 172.24.0.0/16 and some ...
1
vote
1answer
34 views

Finding local IP addresses using Python's stdlib under Debian jessie

I am writing a distributed systems program in python, and in this program I need to know the local ip-address... eg. 168.192.... 10.13..... etc, not 127.0.0.1 or hostname. I have found following ...
2
votes
1answer
49 views

Outgoing packet has NATed src address

Configuration/Topology: There are 3 machines hadoop2 | hadoop | driver eth0 10.10.15.3 | eth0 10.10.15.2 | tap0 192.168.0.199 ...
0
votes
1answer
60 views

Is there anyway to do ssh on a VM with a local IP address?

Scenario :I am using KVM as a hypervisor and Ubuntu as guest and host OS. There are many VMs on a PM and I am assigning IP addresses to those VMs using NAT. To create VMs I am using a baseimage. So ...
1
vote
1answer
253 views

Is it possible plugging in a crossover cable to a 1Gb network adapter fried my adapter?

The host I am working with has two network adapters and is running Ubuntu Server 12.10. In an attempt to network two computers I used a cross-over cable as in the old 100Mbps days. After doing this I ...
2
votes
2answers
63 views

Adding a virtual NIC to a 2008R2 server makes internet unreachable, why?

I currently have a Windows Server 2008R2 box with a single physical NIC. For what I want to do I need two network adaptors in the box. To accomplish this, I added a legacy hardware device "Network ...
-3
votes
1answer
27 views

CDN - find the source IP [closed]

I want to communicate directly with website using CDN (Akamai, CloudFlare, etc.) Anyone knows if is it possible to find the IP address of websites using Akamai? or CloudFlare? I have tried to ping ...
16
votes
9answers
69k views

Any way to find unused IP addresses on my network?

How can I locate unused IP addresses on my network? The DHCP server keeps assigning the same address and I need a different IP address to test my application with. The software would need to run on ...
-4
votes
1answer
25 views

External IP shows me ESXi web client [closed]

Recently i installed Vmware ESXi on my proliant server and created some VM there , opened ports on mikrotik router and installed nginx web server and when i tried to reach it via external ip it gets ...
0
votes
1answer
49 views

Server network setup with 2 NICs

We have a debian server server with 2 NICs. The Server should be configured with 2 IP addresses, one internal address for the communication in our LAN, and one public IP accessible from the internet. ...
5
votes
4answers
3k views

Openvpn, forward packets very slowly

I rebooted my server, and an odd issue just came out. I am running on ArchLinux, the clients are Ubuntu, Android and Mac. The problem is that accessing the internet via the clients is slow, about ...
0
votes
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 ...
-1
votes
1answer
36 views

setup domain with random ip addresses [closed]

i set up nameservers as follows ns1.domain.com ip1 ns2.domain.com ip1 ns3.domain.com ip2 ns4.domain.com ip2 ns5.domain.com ip3 ns6.domain.com ip3 all dns records and PTR records correctly has been ...
0
votes
1answer
36 views

Utilizing A Secondary IP On A NIC In A Windows Cluster

RELEVANT INFORMATION I have a windows cluster with 3 nodes in it... Node1 Node2 Node3 I have 4 NICs on each node... NIC1_Host NIC2_Virtuals NIC3_Cluster_HB NIC4_Live_Migration This is the ...
1
vote
3answers
2k views

Is it possible to configure a reverse VPN tunnel?

Basically, my goal is to have a 100% portable and independent server. I'm building it using a Raspberry Pi powered by solar panels and batteries, and it is to be connected to the internet using a 4g ...
1
vote
1answer
77 views

Linux - show dropped packets form firewall

I am trying to set up a sip trunk and so far everything has gone well. The only issue I face is that the call does is not received when the iptables service is running. By stopping the service ...
1
vote
1answer
42 views

Select source IP on windows server 2012 with multiple IPs on 1 NIC

I have searched a lot for a solution to this case but I couldn't find any. So, any help would be appreciated. I have a windows server 2012 with 1 NIC having 2 IPs bound to it 37.188.120.8 and ...
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votes
3answers
358 views

Is it possible to transfer an IP address from one host to another?

I have a client that created over 600+ websites whose DNS records point to an actual IP address and not name servers. They are looking to move from their current host and do not want to lose their IP ...
1
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0answers
15 views

A local IP address (RFC 1918) on my network that is not … local .. [duplicate]

I've noticed an IP address today on my network (192.168.15.1) which when visited actually goes to a page that has a router webconfig page (Not my router) The puzzling thing is that i tried traceroute ...
2
votes
5answers
354 views

Intercom over IP?

This is an odd request, but I'm hoping some of you have had to field it before: We have an office in New York and remote employees in Oregon and Florida. Communication is extremely important to us, ...
-1
votes
1answer
32 views

Why must the IP be configured on the bridge device? [closed]

My understanding of a network bridge is having a kind of "virtual switch" which virtually connects the network devices (that were added to the bridge) as if I would connect them to a real switch with ...
2
votes
1answer
67 views

A local IP address (RFC 1918) on my network that is not … local

I've noticed an IP address today on my network (192.168.15.1) which when visited actually goes to a page that has a router webconfig page (Not my router) The puzzling thing is that i tried traceroute ...
-1
votes
1answer
11 views

Addresses overlapping

I was putting somes static addresses to my interfaces then it shows me this: 172.16.1.0 overlaps with FastEthernet 0/0 What does it mean when two addresses overlaps and how can we avoid it? EDIT: ...
2
votes
5answers
27k views

How to extend IP Range from 192.168.1.1 to 192.168.2.254

Here's my question. I currently have a network setup to have Static IP manually assigned between 192.168.1.1 and 192.168.1.99 and the rest (192.168.1.100 through 192.168.1.254) assigned automatically ...
2
votes
1answer
54 views

Prosody, how to get the IP address of connected clients?

I'm running Prosody server on ubuntu. I was wondering if there's a possible way to get the IP address of each client who connects to my server, basically, I want 2 things: 1) I want to get the IP ...
0
votes
1answer
35 views

Change source IP for specific target host

This is a follow up to this question of me. (Still on Debian 7.8) The problem isn't really IPSec related or anything, because I can't even ping the remote host with the "correct" source IP (through ...
0
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0answers
22 views

CentOS wrong outgoing IP address on forward

I have a rather strange behaviour for me in here. I am trying to forward traffic between two interfaces (one being a bridge) but will not work as intended. Here is the setup: Kvm host has br0 ...
0
votes
1answer
45 views

multiple ips on same server

We have a server (a router) with 5 IP addresses (we are hosting different Websites). I'm wondering why the server was setup like that: -> eth1 is connected to the modem -> when the connection is ...