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

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Using multiple “myhostname” in postfix

Does postfix allow to dynamically change "myhostname" ? I rtfmed a lot but did not found anything qualitative. My installation is a postfix multiple domain, multiple ip (tweaked in master.cf) and ...
-5
votes
1answer
28 views

What happens when a static IP address is unavailable? [on hold]

I have several Raspberry Pis configured with static IP addresses (192.168.1.203 being one of them). I swapped out the router yesterday, and this router is using a different IP scheme (192.168.178.*), ...
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2answers
47 views

DHCP server - No IP for computers out of the domain

I would like to know if there is a way to deny leasing an IP address through my MS DHCP server to computers which are not registered in my domain. Thanks!
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0answers
4 views

Two IPv4 adapters in same PC on same network valid? [migrated]

Is it valid to have two network adapters on the same PC have the same network portion in their IPv4 address? If not why is my DHCP server doing so and how should I setup my DHCP server to have it ...
0
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0answers
7 views

Cisco ASA5505 Public IP Address

I am trying to configure a Cisco ASA5505. I am using the GUI start up wizard. When I assign the outside IP address to be a public IP address the configuration will work but after about 30 seconds the ...
0
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1answer
34 views

iptable CLUSTERIP doesn't work

We have some requirements which explained here. We tried to satisfy them without any success as described. Here is the brief information: Here are requirements: High Availability Load Balancing ...
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0answers
4 views

Do two computers connected on the same wifi have the same ip address? [migrated]

This question might look stupid but I wondered if two computers connected on the same wifi have the same ip address ? (e.g my dad's computer and my computer, at home) If so, how does the outside ...
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votes
2answers
32 views

Block incoming traffic from unresolved IP address

How can I block all the incoming traffic from unresolved IP addresses? I am using CentOS with WHM/cPanel installed. I am getting huge junk traffic and 95% is from unresolved IP addresses and only 5% ...
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2answers
84 views

RV042. Public IP on LAN port. Is it possible?

I have a RV042 router with a public static IP (XXX.XXX.XXX.42) and 4 LAN ports assigned to net 192.168.1.0/24. Can I connect a host to one of the LAN ports and assign it a public static IP ...
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votes
1answer
56 views

One Public IP, Private IPs, DNS Server and Multiple Servers [closed]

I have lots of unanswered questions about these topics. So, lets begin. First off all, I'm not a server and networking guru. I'm a regular PHP developer. And I've read allmost all of the articles ...
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2answers
47 views

SSH into EC2 with dynamic public IP address

Typically I set ssh aliases as follows: ssh -i ~/path/key.pem ubuntu@public-host-name.compute-x.amazonaws.com But with EC2 instances, the public-host-name changes whenever an instance is stopped and ...
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votes
2answers
54 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 ...
2
votes
0answers
90 views

Private nameserver IP [closed]

I am working on a VPS. The server we are using was installed with WHM Accelerated and CPanel, the option we selected for DNS was BIND. When I came to updating the Nameservers on the Domain ...
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0answers
17 views

Unable to communicate with web proxy server on iOS

I am following the instructions on how to use a HTTP proxy with an iPhone, however I appear unable to communicate with the HTTP proxy. I have configured the settings in my phone correctly to use the ...
0
votes
1answer
45 views

Limit on IPs assigned to one interface

I have a unique application where I need to use many IPs on one server. Will Ubuntu networking crash if I assign 2048 IPs to one eth0 interface?
0
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1answer
20 views

Mod Security2 deactivation rule only from a specified IP addresses

Is it possible to disable a rule by Mod Security2, only for one specified IP addresses? Only for one specified IP addresses & only for one specified path ( /administrator ) ? I tried this: ...
3
votes
5answers
952 views

Can I have my DNS server and my web server on the same IP? [closed]

I just bought a raspberry pi and made it a web server. I have a network with 1 IP. I created a DMZ and I am able to access my raspberry pi web server from the internet. I bought a domain that I intend ...
0
votes
1answer
14 views

Windows Server | firewalling remote connections

In my windows server 2012, In the firewall rule for remote desktop connections I have added so that only MY IP address is allowed to connect, now of course I have taken a precaution and added a ...
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votes
3answers
39 views

Determine if IPs are backed by VPS

Is there any way to determine if IPs are backed by actual VPSes? For example, a VPS host receives a /22 block of IPs. He puts them on his server and requests more, but you want to verify that each IP ...
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votes
1answer
29 views

How do I access a site by IP on a CentOS server

I have a CentOS 6.3 server, running Apache and have DirectAdmin installed. I have created what will be a new domain, but I do not have a domain name yet. For now I have created, lets say, ...
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votes
1answer
35 views

Limit Emails Per Hour Per IP [closed]

Anyone knows a script or software for CentOS and Windows that can be installed onto dedicated servers with no control panel limiting emails per hour per IP or full block. Thanks in advanced!
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2answers
45 views

CentOS: Can't add route after deleting the /24 rule from main routing table

As the title says, after deleting a rule from the main routing able I am not able to add any route till I do service network restart or ifup eth0 To reproduce the problem: ip route list table ...
1
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1answer
18 views

Website getting reply from old ip

I have changed a DNS entry (A record) in my AD server for a website address. But I was not able to browse the site after that. When I tried pinging and nslookup, I could find the web address getting ...
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0answers
13 views

How many packets lost is “affordable” in terms of stable network? [migrated]

Recently I've been having some issues with my internet connection. My mom complained that internet stops working sometimes and it comes back after a while. It didn't happen to me, but did see it ...
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0answers
20 views

ISPConfig and node.js on second IP

I have 2 IP addresses and I use ISPCOnfig and I would like to run node.js in on of the IP. How would I do that. I do not find any documentation regarding to ISPConfig
0
votes
1answer
51 views

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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votes
1answer
19 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 ...
0
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2answers
68 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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votes
3answers
76 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 ...
0
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2answers
47 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 ...
1
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1answer
52 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 ...
1
vote
1answer
53 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
52 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
52 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, ...
0
votes
1answer
35 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 ...
0
votes
1answer
35 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
26 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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2answers
42 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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votes
2answers
48 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
59 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
56 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 ...
2
votes
2answers
120 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
31 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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votes
1answer
42 views

Possible to emulate an IGMP querier in software?

In the absence of an IGMP capable router, is it possible for the multicast source itself (or any other host, for that matter) to assume the router's role and send IGMP queries etc. so that (IGMP ...
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0answers
30 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 ...
0
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0answers
52 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
78 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 ...
1
vote
1answer
55 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 ...
-2
votes
1answer
280 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 ...
3
votes
1answer
333 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 ...