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

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1answer
2k views

Why Are There Only 65,535 Ports, and Will We Ever Have More? [closed]

I understand the original reasoning behind having 65,535 ports per IP address: this is the highest number that can be represented by a 16-bit, or 2-byte, number, and it wasn't conceivable that ...
1
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1answer
78 views

2 ips on 1 port vs 1 ip on 2 ports

Background I have a PHP-FPM sitting behind an Apache server. As I need to use two different configurations for PHP-FPM, I can configure it to be connected either on: 127.0.0.1:9000 and ...
8
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4answers
13k 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 ...
0
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1answer
3k views

can't access vSphere when rebooting vCenter Appliance

My root passw for vCenter Appliance has expired and I need to boot it from Linux Live-CD in order to recover it, now whenever I reboot the vCenter Appl. within the vSphere console, I loose connection ...
0
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0answers
132 views

localhost answering wrong ip

No idea how/why, but here's what I'm seeing. Consider 3 CentOS 5.10 boxes: Host A [10.1.2.7] Host B [10.1.2.8] Host C [10.1.2.9] All of a sudden we're getting strange behavior from Host X, ...
1
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2answers
102 views

Hosting server IP address doesn't match A record but still resolves, website loads ok?

Pretty confused by this, I have a website which is on a Fasthosts shared hosting package, the server IP is 213.171.xxx.x However when you do a DNS lookup the A record is a completely different IP ...
0
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1answer
60 views

find static defined device on network

I have a 'simple share nas' that I am unable to discover on my network. It will not show up on the client list of my router, but I believe it is statically set to an adress for the auto discover ...
0
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2answers
451 views

Port forwarding between 2 routers and wrong IP at the end

So here is the situation: I have adsl modem connected to 1st router "A" - local IP 192.168.2.1 I forward SSH port to 2nd router "B" - IP 192.168.1.1 On router "B" I forward SSH port to machine - ...
0
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1answer
323 views

Cannot access phpMyAdmin website with regular browsers, but with Tor

I'm having a weird problem: My os is MacOsX 10.8.5. What I try to do is to go to phpMyAdmin website and download the latest version. The problem is that the phpMyAdmin website won't load with ...
2
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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
33 views

Traffic on IP which is not being used?

My server (Debian 7.4, x86_64, Proxmox) has 4 IPs. One for the VM Host (call it A), and three that I use for virtual machines (say B, C and D). Currently, only B and C are used, the D address is not ...
1
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2answers
396 views

How do I redirect to different backend server based on URL using Apache?

I'm a newbie to Apache, sorry if this is a documented solution somewhere. I have been scouring the web and can't seem to find this answer ... I would like to redirect traffic based on the URL coming ...
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1answer
758 views

Get instance-id of EC2 instance via Java [closed]

I have an AWS EC2 instance deployed as a server, and I need to find out its public IP. Howver, to know that I must first know the instance-id of my instance. Objective: I have a Java code running ...
0
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3answers
193 views

Can you access an EC2 server from another AWS account?

If you have an EC2 server with a port open, then other EC2 servers can access it (using private IP). But, what if another AWS account hits that private IP, will they be able to access it?
0
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2answers
196 views

Any gotchas when using the lowest and highest IP addresses in a small block?

OVH offers additional public IPv4s in blocks as small as /30, that is 4 IPs total. As I understand it, strictly speaking two of those are supposed to be unusable. However, OVH allows me to route those ...
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1answer
173 views

Reading tracert output - what does this address mean?

7 7 ms 2 ms 3 ms 83.149.18.148 8 * 78 ms * ae52.edge7.Frankfurt1.Level3.net [195.16.162.53] 9 * * * Request timed out. 10 80 ms 80 ...
1
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2answers
977 views

RDP to machine on network with different subnet

Our broadband router has just been changed and our network which was on 172.18.2.xxx is now 192.168.9.xxx. All is fine but I have one box which we used to RDP into and which has no screen mouse or ...
2
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2answers
8k views

Can't access local web server using remote ip from within LAN

Since I've change my ISP, the current router (ADB P-RG A4202N) won't let me access my web server from within my local network using my remote IP or no-ip host - it redirects me to the router config ...
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1answer
62 views

Is there any affinity between IP subnets and DNS domains? [closed]

I understand what DNS and name servers do. But one question that I have is whether there are any technical, or convention oriented, relationships between DNS domains and IP address space. ...
2
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1answer
411 views

Assign different Hostname to different NIC

I have four network card on my server, I have assigned each with an specific IP now I want to set an different hostname for all the interface? What is the difference between setting the hostname in ...
1
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2answers
156 views

Restrict access to service to WiFi users

I would like to restrict access to a cloud service based on the network where the requests are coming from. I have control over both the network, and the cloud service receiving requests from within ...
1
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1answer
42 views

How do I send a different subdomain to a different IP, if two IPs are on the same VPS?

I have a VPS with three IPs. They're all on completely unrelated IPs (one is 23.226.xxx.x, another is 107.161.xx.xx, a third is 167.88.xxx.xx). If I go to beta.mydomain.com (for example, that won't ...
0
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0answers
234 views

Tracert of a spoofed IP results in Infinite Loop

Our firewall picked up a spoofed IP address that caught my attention. When I did a tracert to the spoofed IP address I get what I think is an odd response. Tracing route to 192.168.1.7 1 1 ms ...
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0answers
116 views

How often does the geolocation associated to an ordinary IP address usually change?

Can anyone tell me how often should i expect a routable IP address (either v4 or v6) to have its associated geolocation (country + city level) changed, in average? I'm asking this because i'm ...
1
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1answer
143 views

Bridging is breaking the server: KVM configuration

I'm pretty new to networking and just can't get my head around this. I'm trying to setup KVM-Qemu so I can run some virtual machines. The instructions I'm following are telling me to use eth0 and ...
0
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1answer
184 views

Show real TCP/IP addresses behind Nginx environment

When i execute the command netstat -atun | awk '{print $5}' | cut -d: -f1 | sed -e '/^$/d' |sort | uniq -c | sort -n I see high number of connection assigned to server ip I want to see the real ...
1
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1answer
223 views

One IP for whole LAN, provide access to local server outside the LAN [closed]

I have a LAN with multiple PCs and some servers. I would like to provide access to one of the servers from outside the LAN. The problem for me is I have one IP address for the whole LAN. The server is ...
0
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0answers
29 views

Jumphost VM not able to communicate with LAN

I have setup a jumphost VM on WinXP. It has 2 NICs. NIC1, which is the LAN, has the following IP settings: IP: 10.0.0.1 /24 (No default/ DNS configured) NIC2, which has external connections, has ...
0
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1answer
923 views

How can i get ip address of client connected to remote desktop

I have this environment: I have one windows server with many client that will connect to it in remote desktop. For each client it creates a new session asa it connect to rdesktiop. What i need is ...
0
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0answers
115 views

Edge firewall on Ubuntu, dynamic IP address, static DNS

We're setting up a software firewall, and one of the issues we're facing is that eth0 has a dynamic IP address. In /etc/network/interfaces we've got the following: # The loopback network interface ...
1
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3answers
208 views

drop ips with iptables from awk result [closed]

I have a log file like this : Frq:15 IP:0.0.0.0 Date: 2014-03-21 12:19:31 AM Frq:9 IP:198.252.206.25 Date: 2014-03-21 12:19:31 AM Now i get column of ip addresses with awk : cat /tmp/test | awk ...
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1answer
55 views

SOHO Routers and Non-Standard CIDR Blocks [closed]

I recently learned about private networks. From what I understand there are three address ranges for use in private networks: 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 If this is the case, then why ...
0
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3answers
671 views

Wrong IP address has been set to ESX server

I have an ESX server without direct console access (disabled). The server has wrong ip address (broadcast ip address) and I have no way to connect to it. How can I change this IP address or connect ...
0
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3answers
196 views

Would blocking an entire ip range of a country potentially hinder performance?

We've discovered a lot of brute-force attack attempts on our server originating from a particular country. We plan to block all incoming traffic from that country, but it is quite a list. To be safe, ...
0
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1answer
130 views

Create a trigger when a mobile connects at network [closed]

I'm a complete dummie on Network subjects. I'm trying to create a log, when a specific iPhone/Cellphone connects into a wireless network. The main goal is pull a trigger (create a log file, send a ...
0
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1answer
407 views

How to access a domain or its subdomain from the Local Area Network in Nginx?

I've got a local server configured with Nginx, PHP5-FPM, MySQL and some other stuff. I'm hosting two sites. One static website using Twitter Bootstrap and a theme: at www.example.com One WordPress ...
0
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0answers
155 views

Debian on VM has web access but can't be pinged

I have just installed Debian on a Virtual Machine. I have internet access on the VM and installed SSH. I then did a ifconfig and discovered that the IP address is 10.0.2.15 which is strange as the ...
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4answers
109 views

Find out IP of connected interface?

Suppose I connect two machines directly together with an ethernet cable. I know nothing about machine2's configuration - I only have access to machine1. What can I do on machine1 to determine ...
1
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2answers
157 views

Configuring two IPs for one server?

I have a windows server that is running two ASP.NET websites. I would like to setup an HTTPS connection for each site. I had initially run into problems because I was trying to use a single IP ...
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votes
1answer
62 views

why return different sequence of ip addresses? [closed]

When I used nslookup to query google.com twice, I got same ip addresses but different order, why? These are return: Server: 129.173.1.100 Address: 129.173.1.100#53 Non-authoritative ...
4
votes
3answers
581 views

In Active Directory, what is the relation between IP, MAC, and OS?

I have one machine on which I want to run 2 different OSs, dual boot between Windows Server 2008R2 and 2012R2 (or others). I want to keep the same computer name, the same IP address, and the same MAC ...
1
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2answers
1k views

Arbitrary loopback ip addresses besides 127.0.0.1

I am developing a web app that has to produce different output based on ip. For testing and during development it would help a lot if I could have more loopback ip addresses besides 127.0.0.1. Is ...
0
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3answers
121 views

Should I get extra IPs?

This is my proposed setup using OpenVZ containers (hosted on Proxmox): CT 1: MySQL and nginx. Hosts all databases and multiple websites(domains). Used ports are 80, 443, 3306, 8080 CT 2, 3, 4: These ...
1
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0answers
273 views

Virtual Machine IP address type changed from static to dynamic

I am testing VMM in a lab environment, I have one VM host machine with one physical network adapter that has been allocated an IP address in the 192.168.1.0/24 subnet on a router. I have create ...
0
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6answers
5k views

Use the LAN based IP address to access local Apache on laptop when working outside the network?

<VirtualHost *:80> DocumentRoot "D:/Projects" ServerName 192.168.11.74 </VirtualHost> Why doesn't this work ? How to access websites on the local box (Windows, Apache, MySql, PHP) ...
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votes
1answer
127 views

Which cloud providers which let you spoof an outgoing IP address, and how? [closed]

I have a web application which is load-balanced using LVS which has been hosted within my organization's network to this point. We've used both direct and tunnel routing within LVS, which results in ...
-3
votes
1answer
114 views

Bandwidth requirement to live broadcast an event on the internet [closed]

I am assigned on project to live broadcast an event on the internet which may have 50,000 user s. This will be a broadcast so all users will see same live video. My query is what would be my bandwidth ...
0
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0answers
153 views

how change the output IP of every PROXY to it's own IP in CentOS (SQUID- Multiple IP)?

i configured a proxy server in CentOS server using with squid i have multiple ips like these : 192.233.76.1 ~ 100 i've added those ips to my one interface. so every HTTPS proxy works well -> ip ...
0
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1answer
356 views

vmware vsphere clone vm

this is my first time cloning a vm ubuntu 12.04 production server on a mvware esx enviroment. Thus I´m a bit scared of lose sight of something. The Server is nothing more than a webserver apache + ...
0
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1answer
263 views

Don't show IIS default page if ip address is visited

A pci company has pointed out that the IP addresses on our server should not be accessible - the sites should just be accessible via the domain name. Currently if you visit one of the IP addresses it ...