IP address is a numerical label assigned to each device participating in a computer network that uses IP for communication.

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1answer
895 views

LAN->LAN IP translation (for TortoiseSVN + Artifacts + Buffalo router)

Here's my scenario: I've got a VisualSVN server on my main dev box @ home. I'm also using Visual Studio 2010, TortoiseSVN, VisualSVN client (for source control), and Versioned 'Artifacts' (for bug ...
-2
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0answers
17 views

New ip-address assigned to server? [on hold]

My ISP blocked my old ip-address of my server. And assigned me a new one. My question is: will this new ip-address when I ping it from my home address give a response? Because it does not give any ...
-3
votes
1answer
25 views

IP address to geolocation without any lookup database [on hold]

I wonder is there any way on linux shell command(s) to find an IP's approximate physical location without using any lookup databases such as MaxMind GeoIP, db-ip etc.. I know there are some API ...
14
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17answers
41k views

Shell Command for Getting IP Address?

Is there a bash command to find the IP address for an Ubuntu box? I need to find the IP address so I can ssh into the machine later.
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2answers
42 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: ...
0
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0answers
30 views

How can you calculate IP address subnet ranges? [duplicate]

If you're given: Number of needed subnets: 2 Network Address: 195.223.50.0 I can answer the following: Address Class: C Default Subnet Mask: 255.255.255.0 Custom Subnet Mask: 255.255.255.192 ...
1
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1answer
23 views

One SSL certificate for load balancing amazon instances

As the title says I want to have one SSL certificate for multiple instances in amazon AWS. The multiple instances are connected to the internet through an load balancer. To make an SSL certificate and ...
0
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2answers
892 views

adding 2nd private IP on AWS EC2 instance

I am having problems adding a 2nd IP on AWS EC2 instance. I am running Ubuntu 14.04. I already tried this: a) Right clicked the instance and added a 'private IP' from the manage Private IP. b) ...
7
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4answers
10k views

Block range of IP Addresses

I am getting bombarded with attempted hacks from China all with similar IPs. How would I block the IP range with something like 116.10.191.* etc. I am running Ubuntu Server 13.10. The current line ...
6
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7answers
4k views

Static IP Address assignment vs DHCP address assignment

I manage a small-ish network that consists of less than 70 nodes. The previous system administrators opted to have a dhcp server and manually set dhcp addess. I have opted to rather use dhcp ...
3
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4answers
13k views

Can I use nmap to discover IPs and mac addresses?

When I need to locate the IPs of devices by their mac address on a Windows system, I normally use Advanced IP Scanner (from radmin.com) to scan the network, then I use arp -a to list the mac ...
0
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4answers
7k views

Finding the first and last address of a block of IP addresses with subnet mask

I am not sure if this is the right place to make this question but I thought this is one of the most appropriate SE's site to make a question on networking. Please move it to other more appropriate ...
1
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1answer
549 views

Plesk 10 Postfix with multiple IP adresses and SSL certificates [closed]

We are currently running a root server with Debian 6 and Plesk 10.4.4. We have some virtual hosts using one IP adress (shared) - e.g. example1.com - and another virtual host using a dedicated IP ...
7
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4answers
1k views

CIDR Ranges for Everything except RFC1918

I'm looking for a list of CIDR blocks for "The Internet", i.e. everything from 0.0.0.0 to 223.255.255.255, excluding RFC1918 address space of 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 (yes, I know ...
0
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0answers
19 views

L2TP daemon server multiple IP

I have VPS with 3 public IP - Debian 7. I would like to have 3 L2TP damemons (one ip each) NATing traffic to each ip. Something like this l2tp_multiple_public_ip_diagram. I have set up l2tp daemon for ...
3
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10answers
8k views

Use first or last free IP for the default gateway?

Please assume a simple LAN on 192.168.100.0/24. Would you configure the default router on 192.168.100.1 or 192.168.100.254 and why? Thanks
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1answer
32 views

IP address detection through firewall [closed]

Suppose my computer connections are filtered by a firewall on which I have no information and no control. Will the administrators of the network will know which websites I did visit thanks to their ...
-1
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2answers
47 views

How to detect proxy server address? [closed]

My computer is controlled by a proxy server. How can I detect its name/IP address ? I would love to know if there any command lines (on Windows) to do that. Thank you in advance.
0
votes
1answer
28 views

Windows Server 2012 R2 - Email server's external IP address when the Azure VM starts

I have been trying to setup a task in the task scheduler that sends an email to me when the server starts. The email should contain the external IP address of the azure virtual machine. What should ...
2
votes
4answers
1k views

Why is this China IP hitting my web site?

I have a web site that uses a couple hundred domain aliases, including franchise-dallas.info, franchise-delaware.info, and detroitfranchise.info (see more below). I have been getting ten to twenty ...
-1
votes
1answer
110 views

Whitelist Elastic Load Balancer based on IP [closed]

I'm serving HTTP traffic on port 80 through an ELB. Since a short time, a growing amount of clients are asking me what our IP addresses are (to harvest data). Apparently they can't whitelist the DNS ...
51
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6answers
4k views

Why can't MX records point to an IP address?

I understand you should not point a MX record at an IP address directly, but should instead point it to an A record, which, in turns, points to the IP address of your mail server. But, in principle, ...
2
votes
1answer
629 views

IIS 7: Disable authentication for certain client IPs

I have a virtual directory that's protected with basic authentication. I'd like to disable authentication for certain IPs, so that all requests from e.g. 127.0.0.1 are allowed without asking for ...
0
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1answer
29 views

Virtualbox Appliance: Maintain same Private IP as used with Vagrant

I have an OVA which I created in conjunction with Vagrant. I want to distribute the OVA, but when people start it up I want to have the same Private IP address assigned by Vagrant. So far I've had ...
33
votes
5answers
3k views

Is it valid to have part of an IPv4 address set to zero?

I am working on a change in a Java EE application that would authenticate based on the user's IP address using ServletRequest.getRemoteAddr. We store IP address ranges (FROM_IP and TO_IP) in a ...
0
votes
1answer
74 views

Secondary IPs on DMZ machines not working

I am moving some virtual machines from my DMZ in a bladecenter over to my new cisco UCS. We are using Hyper-V, and are running Server 2012 on the old bladecenter, and Server 2012r2 on the new UCS. ...
9
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6answers
94k views

Get IP addresses and Computer Names in the Same Network

What is the command that can be used to get the IP address and the names of the computers that are located in the same network? I am running Windows
29
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5answers
3k views

Is 0.1.2.3 a valid IP address?

Are IP addresses with all zeroes in the first octet valid? For example, can 0.1.2.0/24 be a valid subnet, with network address 0.1.2.0, broadcast address 0.1.2.255 and an usable address range from ...
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3answers
2k views

Ubuntu iptables allow certian IP addresses

I have a riak cluster that I need to only allow certain IP addresses access to the information. I am currently using, -A INPUT -s 192.168.10.200 -j ACCEPT, to allow this IP address and at the bottom ...
-1
votes
1answer
103 views

Can 192.168.20.4/24 describe a network or only a host? [duplicate]

As I understand it IP 192.168.20.4/24 can only describe a host (24) on net 192.168.20.[1-254]. Now when describing a net; can 192.168.20.4/24 be a valid network ID, or should such a network ID always ...
6
votes
5answers
4k views

Making iptables easier to maintain

My network is completely locked down except for a few sites which are whitelisted. This is all done through iptables, which looks something like this: # Allow traffic to google.com iptables -A ...
77
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4answers
82k views

What's the difference between ip address 0.0.0.0 and 127.0.0.1?

I do know that 127.0.0.1 ~ 127.255.255.254 are the loopback IP addresses for most modern operating systems and we could use these IP addresses to refer to our own computer. But what's 0.0.0.0? It ...
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votes
2answers
85 views

Do mobile devices have unique IP addresses? [closed]

I have a REST web service that contains a method for sending SMS messages, I would like to ensure that this functionality can only be executed every 10 seconds by any given user. Do mobile devices ...
2
votes
4answers
2k views

What could prevent one Amazon EC2 instance from pinging another instance's Private IP?

I have multiple Amazon EC2 instances which need to communicate using private IPs. However, so far I've been unable to ping one instance's private IP from another instance. I can ping external ...
1
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1answer
70 views

Apache Server: IP Address Routes to Domain Instead of DocumentRoot

I have only one website in my server. My desire is to open different directory when the IP address is used as the URL in web browser. However, even though I set the DocumentRoot to a different ...
1
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6answers
4k views

How to list all the ip addresses of a server

When I type ifconfig, I see that my server has an new ip address each day. The ip addresses belong to a set of ip addresses. How do I find out all the ip addresses of my server?
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1answer
70 views

Is it Possible to Capture All HTTP Packets to a Target IP on a subnet?

I've been trying to use tcpdump to capture packets to a target IP on my subnet, but am unable to do so successfully. I've tried: tcpdump -i eth0 net network-ip-address/27 -A and tcp port 80 But it ...
0
votes
1answer
30 views

Switching network from netmask 24 to 22

I currently have a firewall set up as x.x.1.1 and a secondary of x.x.2.1 on the firewall. On the DHCP server I have a superscope with 2 scopes handing out DHCP addresses. I was told it would be best ...
3
votes
1answer
221 views

Caching DNS server returns invalid ip address for external lookups

I'm trying to resolve a DNS issue and am running short of ideas. Google doesn't seem to be helping, either. When I use my local caching name server to resolve external host names, it always returns ...
2
votes
4answers
2k views

Having public IP addresses for computers in private network

In one of the previous organizations I worked, all of our ip addresses were in public IP range. So, is there any advantage of having public ip addresses for private network?
-4
votes
1answer
51 views

multiple domains, one static IP address and latency [closed]

how is latency affected when multiple domains are using one single static IP address ? The scenario is in shared web-hosting By latency meaning the DNS lookup the client has to do. As far as I ...
0
votes
4answers
4k views

Postfix: Allow SMTP AUTH only from specified IP address ranges

can one implement an IP address based restriction for SMTP AUTH in Postfix? Scenario: I'm running a Postfix mail server that receives mails from all over the Internet. But the server doesn't only ...
7
votes
7answers
15k views

How do you have one IP address and many websites?

How can I have it where I have one IP address that sits on the Internet but many web names? For example, when a hosting company has a shared IP but I get unlimited domain names (along with everyone ...
0
votes
0answers
35 views

Issue with Network IP Binding

Trying to bind a /29 (my possession, not the ISP or data center). It's routed at my core switch fine. interface Vlan70 description SERVER070 ip address xxx.xxx.42.45 255.255.255.248 Content of: ...
0
votes
2answers
294 views

How do I check for a specific IP Address, and then change it if it does not exist?

I am trying to test for a specific IP Address and then change it if it is not there in Powershell. I am not sure what is wrong with my code: if($wmi.ipaddress -ne "10.0.0.15") {$wmi = Get-WmiObject ...
0
votes
3answers
2k views

How can I map my server's domain to my IP address?

I rented some server space from a new host and have a static IP address and a domain name that I previously purchased, but I do not know how to register the domain name to point to my server. My ...
2
votes
2answers
2k views

How to access a site in IIS with no DNS mapping

In my IIS 7.5 hosted in a Windows Server 2008 R2 I have several websites with no DNS address assigned. Let's take for instance the site (as named in IIS) with site name mySite. I have for this site ...
4
votes
1answer
16k views

How are cellphone IP addresses assigned?

When my cellphone accesses a website via the tower and its GPRS gateway, NAT ensures that the sites receive a public IP. Would all phones using a single tower have the same IP? If yes, then how can ...
-1
votes
1answer
127 views

URL not shows specific Host name after uploading ASP project on IIS [closed]

![I have uploaded my ASP project on IIS server with 808 port, and when I try to open webpage by IIS server' Domain name (xx.xxxxxxxx.com) at that time it shows domain name in URL, but when try to open ...
4
votes
6answers
981 views

I have a Cisco Catalyst 2940 and want to connect to it via the network. How to find its IP address?

Since my computer has not serial port, the serial cable is of no help. Does the Catalyst 2940 acquire an address via DHCP? At least my DHCP server doesn't show any address which has been requested ...