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

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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
658 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
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1answer
125 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 -> ...
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1answer
91 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
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0answers
193 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 ...
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2answers
2k 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 ...
5
votes
2answers
864 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
35 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 ...
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0answers
111 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
1k 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
63 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 ...
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1answer
69 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 ...
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votes
1answer
178 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 ...
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votes
1answer
65 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
73 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. ...
2
votes
2answers
157 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 ...
0
votes
2answers
510 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 ...
2
votes
1answer
267 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
1answer
82 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 ...
-1
votes
1answer
69 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
111 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
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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 ...
-1
votes
1answer
17 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
1answer
294 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 ...
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0answers
36 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
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1answer
78 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
votes
1answer
64 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 ...
2
votes
1answer
1k views

DNS errors after changing nameservers for Cloudflare

I don't know if this is the right place for my question, but I have a problem with my DNS/nameservers after changing the nameservers. I'm not sure if it is a problem at my side or at my webhost. I ...
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votes
2answers
305 views

How to configure network interfaces for three NIC cards all on three different subnets

I am setting up a cloud environment on Ubuntu and I am running into an interesting problem. Out of the box Ubuntu (all linux really) doesn't allow you to specify more than one gateway in ...
0
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0answers
212 views

ARP/ICMP in a network environment with overlapping IP address

Currently I have lab network setup to mimic customer's network deployment. (According to the customer, they are using VRF over VLAN so that their customer can have overlapping network connecting to ...
0
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0answers
65 views

Connect to a Server from my AWS EC2 instance

I have a app running on AWS EC2 which connects to a database in another server. The database connection Uri is as following, jdbc:XXX:172.18.2.107:3306/database This is what I got form my ...
0
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1answer
166 views

redirect traffic from 127.0.0.1:5003 to external interface

I have an application that exposes Web Services on the loopback address 127.0.0.1:5003 so they are only available to the localhost. Is it possible to redirect traffic from there to the external ...
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votes
1answer
836 views

Cannot connect to the Internet, Limited Access(Ethernet), Windows Server 2012

I am using a Windows Server 2012 for my institute, due to connectivity issues I uninstalled the services AD DS, DHCP, DNS. But after the uninstall the server is unable to connect to the Internet, ...
0
votes
1answer
296 views

Can't reach static IP address from outside the network

I've got a server with two network cards. The first one is configured with an internal IP and everything works just fine. The second one is configured with an external IP and is causing me some ...
0
votes
1answer
74 views

access server with ip address and not server name

I am trying to access my server to the following address: https://www.media-rewards.com/ But it doesn't work :(. However, if I use its ip address, it works: https://52.0.245.209/ I don't know ...
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votes
2answers
87 views

how to change the special port output source address?

I want to change the my datapackage from port 25 to another internal address(192.168.2.253). iptables -A OUTPUT -o em1 -p tcp --dport 25 -j SNAT --to 192.168.2.253 But I get the output is: ...
2
votes
3answers
509 views

How can one redirect to a new host all traffic destined for an old host?

We're moving a bunch of services, say from 1.2.3.4 to 5.6.7.8. In order to test that the new services are correctly configured, we'd like to redirect (to the new host) all traffic destined for the ...
0
votes
1answer
274 views

OpenVPN not giving the right ip-address

I have this Openvpn-configuration file generated for my windows 7 pc, when i connect to the openvpn it gives me the message that i'm connected with the vpn, but when i check i still get my old ...
0
votes
1answer
53 views

Will Apache2 performance be reduced by huge IP blocklist

My web application is getting more and more hits from unknown sources trying to access secure pages, such as admin panel, etc. So, I want to block IP address from certain countries using this source. ...
1
vote
1answer
181 views

iptables forward ip to another ip

I've configured multiple IP Addresses on my Ubuntu ssh server. Now the server can be accessed by using any IP Address, from 192.168.0.51 to 192.168.0.99. Depending on which IP Address someone uses to ...
0
votes
1answer
100 views

Traffic shaping for upload/download speed simulation [duplicate]

I'm building a network emulator to help realize different speeds. Basically, this system would shape a given user's network metrics (such as upload speed/download speeds/packet loss/jitter etc) based ...
0
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0answers
48 views

How can I assign an IP by UID in DHCPd

Here was answered how to assign an IP by MAC address. I want DHCPd server to assign IP by UID. Can i just add record to dhcpd.conf in the same manner? For example: host example { uid ...
-1
votes
1answer
362 views

How many static IP's do I need for VPN? [closed]

I am setting up a VPN system for my office. Is it correct that if I don't have a dedicated VPN server, I will need to purchase one static IP per computer I wish to connect to? Or can I just give the ...
0
votes
1answer
35 views

CentOS as a router — Can't get static IP adress for Internal Zone

I'm trying to make a router with a CentOS 7 box. enp2s2f0 ---> External Zone ---> directly connected to the internet. enp2s2f1 ---> Internal Zone ---> Connected to a PC (will be connected to a switch ...
2
votes
2answers
686 views

Nginx Make website inaccessible via IP

I've got my website set up to be accessible via example.com. If possible I want to prevent it from being accessed via its IP altogether or at least 301 redirect it to website. Is the former possible ...
0
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0answers
162 views

Windows Server 2012R2 Hyper-V Additional Public IP Subnet

I am using Ubiquti Hosting for a bare metal server. The server has a base IP address space of: Main IP: 24.79.37.82 Default Gateway: 24.79.37.81 Subnet Mask: 255.255.255.248 Usable Range: ...
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votes
2answers
392 views

Setting up multiple sites on one IP address [closed]

I am working for a client that has a CentOS 7 server running Apache 2.4.6. I have a Zend Framework/PHP based website running on the server. It only has an IP address. No domain name is pointed to it. ...
-1
votes
1answer
110 views

Subdomain with different ip on same server [closed]

I am creating a subdomain with a different account (same name-servers) But I am wondering if there are any advantages to giving the subdomain a dedicated ip (same server hosting)
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2answers
39 views

Querying a webserver as if request came from a certain remote IP?

I am having trouble with my Apache web server configuration since a number of remote clients receive 404s, while the majority of clients (me, locally, included) do not have any trouble (status 200). ...
0
votes
1answer
359 views

Correct way to setup VPN/VLAN for small business NETGEAR FVS336G

My current employer has a horrendous setup for his internet, 2 Virgin Media cabled lines with routers that you'd use at home. So we've had Fibre Optic installed and a Pool of 5 Public IP Addresses. ...