Tagged Questions

The IP (internet protocol) is a protocol for transmitting data over packets ("datagrams"). It is the primary protocol of the Internet. "IP" may also refer to an IP address, the numerical address assigned to an IP-capable device.

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Additional ip addresses along dhcp

On windows it seems possible to add arbitrary ip addresses on the interface, but as soon as you add one, the addresses obtained with DHCP is removed. Is it possible to set static ip addresses while ...
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2answers
65 views

Retain information by an IP address [closed]

What information can I get only by having an IP address ? For example: Computer name, domain name, dns servers (if it's a server) etc. Thank you.
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197 views

How to block ip range in mac OSX?

I have some troubles with connections from ip 146.66.*.*. How to block them in OSX Mavericks without using external software if possible ? I know iptables on linux but I have no clue for mac. Note ...
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5answers
2k views

If IP addresses are unique, why is it so many routers have the address 192.168.1.1?

I have a beginner's question. If the IP address is your identity on the Internet and it is unique. Then how come every router's IP address is 192.168.1.1 and PC1 is 192.168.1.2, PC2 is 192.168.1.3 and ...
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2answers
314 views

Is it possible to get different external IP Address for two different computers that connect to the same router? How?

I want to play an online game with my brother, but the game seems to prevent having two users use the same external IP Address at the same time. Is there any way to have two different external IP ...
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2answers
74 views

Keep IP and MAC address when cable is unpluged

I have an application that look for ethernet interface and only works when at least one ethernet interface with an static IP and MAC address exists. this should show in ipconfig. I have an on-board ...
6
votes
1answer
498 views

Is listening on a port on the localhost of a server the same as listening on that port of the server's public IP address?

I set up a free Amazon EC2 instance in order to use a Node app outside of my localhost environment. The instance is allocated a public IP address at launch, mine for example being 54.187.31.42. Does ...
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1answer
54 views

Interpretation of the unix command: ip address

I have to interprete the result of the unix command: ip address I'm getting something like this: 2: eth-man: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen ...
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0answers
51 views

Ask dnsmasq the hostname used to find to an IP address

I know I can find a DNS name from an IP address by using a reverse translation DNS query. But that just gives me a DNS name for that IP. Instead, I'd like to find the DNS name that was used to find ...
0
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1answer
118 views

Why would an IP address fail, but the server (hardware and web server) and file system work?

Please forgive me if this is a duplicate, or better on network engineering SE. I have an account on BlueHost, and it provides me configuring multiple dedicated IP addresses and multiple SSL ...
3
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2answers
403 views

Wordy IP for internal devices

Hi I would like to have a ip to connect to devices on my network at home, however I don't want to have to remember lots of numbers instead I would like to have address that uses words. For example I ...
0
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1answer
98 views

How can I connect to a router through a switched ethernet network?

I have a computer and a router connected at different positions to a switched ethernet network. I want to connect them as if I had plugged my computer directly into the router. As I understand it, ...
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1answer
638 views

How can I acces my raspberry pi server from outside my network?

I've got a Raspberry Pi set up as a server. I can acces it with 192.168.1.2, because i'm in the same network. Now I would like to be able to acces my Pi from outside my network (eg school). I want to ...
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1answer
99 views

I want to ping IP using LAN cable not wireless

I have one machine connect to network using two method : Wireless - got internet access - Class C ip : 192.168.2.xx - Connect with local network with few PCs. LAN do not have internet access ...
0
votes
1answer
187 views

difference between network id and subnet id

Typically a classful ip address will be split into a network id and a host id, like in the following example: $ route Kernel IP routing table Destination Gateway Genmask Flags ...
1
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1answer
36 views

Preserving packet order

In my understanding among the many responsabilities the iso/osi model link layer has, it has to make sure that the ordering of packets is preserved. Can you please clarify to me what the point in ...
0
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2answers
78 views

Apparent IP doesn't take me to website

I noticed that sometimes, when ping requesting a website, I receive an IP Address that doesn't in fact take me to that domain name. It instead takes me to the default server page. For example, if I ...
0
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2answers
123 views

How to find slash format of an IP address?

For example, in this IP address: 145.32.59.24 the slash format should be /16 in the answer. But I have no clue how this to determine it. I understand this is a class B IP address. Please help me.. ...
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1answer
425 views

How can I change my ip address from dynamic to static? [closed]

I am on Windows 8. I want to change my IP address to a static address. I have tried putting up a dummy static address like 192.16.16.16 but it does not work. Please guide me. Thanks. My network ...
0
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2answers
84 views

VPN and Local IP Address

I am using a VPN service. After recently installing a program that monitors ports, I noticed that whenever I am using my VPN, my local IP address changes. I am aware that the external IP should change ...
2
votes
4answers
891 views

Bind IP address to application

I have multiple network interfaces on a single machine. I am wondering how I can bind a network interface to an application. Example: Network Interfaces: eth0, eth1 Application A use dummy0 ...
0
votes
1answer
151 views

How to forcibly refresh and renew my IP address? [duplicate]

I am in the Hostel and we are provided with Wi-Fi connectivity.The problem is that the IP address that is assigned to my machine works only for 5-6 hours. I want to refresh the IP address so that i ...
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votes
1answer
85 views

Classful addressing and routers networks [closed]

With classful addressing there are basically three classes of networks, a public or private organization can request,for its hosts,a network of class A,B or C with A being the largest followed by B ...
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1answer
56 views

how to know if my ip is changed?

my computer got stolen like a month ago (i got roved at my apartment) and i could not recover it so i had to buy another. On this new computer i installed ultravnc but i need a program that emails me ...
0
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1answer
26 views

figuring out if a network is using a static public ip address

Is there a way to find out without calling the service provider? Are there native tools built into Mac linux or Windows to enumerate this info?
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1answer
86 views

Policy route by source MAC address

I have a requirement to perform MAC based policy routing on embedded Linux platform (desktop Linux example will work as well) . I have examined the man of ip route add command and did not found ...
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vote
2answers
58 views

SSH to my company's server

So I am working from home and I need to connect(SSH) to my company's server ever yday. The problem is that they have recently done an IP lockdown and only selected IPs can connect. My IP is not ...
0
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0answers
31 views

What happens when a spoofed source IP packet emerges out of a private network with NATing

Suppose as a attacker i want to have a Ping or SYN Flood attack that floods a server with Pings/SYNs .. If i change the source IP of the packets generated at my machine of the packets to a ...
0
votes
2answers
173 views

ifconfig command on mac does not show IP address

When I run ifconfig, eth0 is not shown, and only en0 is displayed: >> ifconfig en0 | grep inet inet 192.168.0.102 netmask 0xffffff00 broadcast 192.168.0.255 When I type My IP in Google, my IP ...
0
votes
3answers
598 views

One line command in windows to get computer's ip address over my wifi network

I have a windows server setup where I would like to get the wifi ip address of server dynamically. The problem is that ipconfig returns a huge string and the script I am using wants the address ...
0
votes
0answers
35 views

add to table not working with ip route

i have added two table names wifi and voda to /etc/iproute2/rt_tables. 255 local 254 main 253 default 0 unspec 1 wifi 2 voda Now i am trying to add rule to the ...
0
votes
0answers
22 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 ...
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0answers
44 views

Ping issues and configuration issues

My host machine has an IP 10.116.65.150 and my secondary machine is part of the same network. (( I did connect my laptop to the same ethernet and switch link as I had connected my secondary machine ...
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2answers
515 views

Sending multicast packet with source IP equal to virtual interface IP in Python

I have a system with a virtual network interface eth0:1, and I want to send multicast packets that have a source IP of that interface. However, my packets end up with the source IP for eth0. How do I ...
1
vote
1answer
65 views

Does IPv6 offer any security or performance over IPv4

Is there any gains or reasons to move to IPv6 other then the lack of IPv4? Is the protocol still the same as IPv4 or were there any major changes.
1
vote
1answer
142 views

what is DMZ in Router, how to make an private ip act like public ip

i have a d-link and i'm behind a NAT router by my ISP i knew that because i receive in my router wan IP a private IP, i forwarded port for my computer ip but it still closed so what is the solution ...
5
votes
3answers
2k views

Detect IP Conflicts on Network

I have a Wireless WAN network that I am managing devices on. We recently had an IP conflict that took us over 10 months to find (we had no idea there was even a conflict until we were pinging a ...
2
votes
1answer
143 views

local network - ping local ip fail

I have trouble to connect to own host, here is details debian is virtual host o virtual box grek@debian-dev:~$ ip addr 1: lo: <LOOPBACK> mtu 16436 qdisc noop state DOWN link/loopback ...
11
votes
2answers
1k views

Why am I seeing multiple different IP addresses reported as my public IP? [duplicate]

Could anyone explain why these sites are showing me as having different public IP addresses? www.whatismyip.com - 46.19.227.251 as my IP showmyipaddress.com - 46.19.227.253 as my IP ...
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2answers
183 views

How to find the IP address of a router

I live in a dorm where many students have setup small wireless networks. There are two of this networks that are very close to my room as the signal is very strong. Our college uses DHCP to assign IP ...
0
votes
1answer
173 views

How to properly obtain the ip ranges of a domain?

In order to shape traffic cheaply, I would like to know the address range of a particular domain, say google.com. First option is to do a reverse dns lookup for a range of ips that are close to the ...
1
vote
2answers
1k views

Multiple IPs on Multiple NICs same subnet

So, I've got two NICs: eth0 eth1 and I have multiple IP addresses assigned to each: auto lo iface lo inet loopback allow-hotplug eth0 iface eth0 inet static address 10.0.0.194 netmask ...
2
votes
1answer
1k views

How to know which DNS servers are resolving my computers requests?

My Win7 box is erroneously resolving a IP address. I had the same problem last week and "fixed" that by switching to Google Public DNS 8.8.8.8 and 8.8.4.4 for IPV4 and the others for IPv6. So when ...
1
vote
2answers
98 views

Can using a different DNS server effect ones IP address?

or more precisely: what websites perceive ones IP address to be? I've always thought your IP would stay the same and changing your DNS would just effect how it resolved others Names to IPs but ...
0
votes
1answer
60 views

WindowsCE device with single NIC - Two IP address ranges

People, I have got a question about a windows CE device which has a single NIC (and no possibility to extend the device with a second NIC). This device is configured to use a fixed address CE ...
1
vote
2answers
195 views

Concise IP information in OS X Terminal

Is there a command for the OS X Terminal that shows you only the most vital IP configuration information about your machine? I know there is "ifconfig" but that brings up a bunch of (in most cases) ...
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votes
2answers
47 views

DNS- Use Different Domain

So I'm planning to purchase a dedicated server from Northhosts (northhosts.co.uk), and the company owner (I assume the guy runs the company, and also provides support to customers) gave me a test IP ...
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votes
1answer
27 views

Routing table information

I want to find all the possible ip addresses my router can send packet to. I know there is a command route print that give let me see the default gateway, but I want to get all the possible ip address ...
1
vote
1answer
86 views

Get LAN and WLAN networks under same IP range

I'm a newbie in network stuff and haven't enough knowledge to do what I'm wanting for now, so I need your help, please. I've two networks, a wired and another wireless. The wired one is between two ...
0
votes
0answers
36 views

Ping IP/Hostname works laptop A to B, Can Ping Hostname but IP timed out laptop B to A

I have 2 laptops on home wireless network (Linksys Router). From Laptop A, I can ping Laptop B by hostname as well as by IP just fine. From Laptop B, I can ping Laptop A by hostname but when I ping ...