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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How to mitigate IP fragmentation attacks before reassembly when authentication information is available?

I'm trying to filter incoming traffic to high bandwidth, low latency network, to mitigate DDOS. The incoming traffic is custom UDP (I'm setting the protocol specs so I can force IP headers if ...
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35 views

adhoc networking in decentralized way

I am trying to create a adhoc network in which I am going to use one or more android devices to connect to laptop(s). Say laptop A, laptop B, Mobile C, Mobile D. I rooted one of my android device and ...
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325 views

cant access my site is my ip blocked by ISP

I want to know if my ISP has blocked my website www.indolog.com . If i use another ISP it works fine. Below are the tracert log C:\>tracert www.indolog.com Tracing route to indolog.com ...
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88 views

Routes with question marks in routing table

When I do ip route show table all I see some routes with question marks in them as below. multicast ???/32 from ???/32 table default proto none iif eth0 They appear to be multicast routes. I ...
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3k views

How are IPs assigned on 3g networks?

I am a mobile apps developer who has run into some strange and interesting problems with 3G connections. We develop applications using both the Twitter API and Twitter Streaming API. The normal ...
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657 views

Assign IP address to a Virtual Printer

Is it possible to assign an IP to a virtual PDF Printer? Is there any Virtual printer software that automatically can do this?
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23 views

DNS Server won't work! [Bind 9 on Debian 7; Virtualized CT through Proxmox]

First I'd like to thank everyone in advance for helping me - communities like this are exactly what amatuers like myself need when faced with perplexing issues. I've recently begun virtualizing ...
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19 views

Problems with internet connection with bridged connection

I am having a problem with my network, at the moment it is setup like this: Wireless Router - Laptop connected to Wifi - Pc connected to laptop via ethernet and bridged connection between WiFi and ...
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105 views

Best ip configuration for unique dual router setup

current setup routerA--------------PTP dish link---------------routerB unique wan ip/internet unique wan ip/internet ...
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434 views

Why won't my DHCP addresses “stick”?

I've been having some addressing issues that I've been unable to solve, and I'm hoping I can get some guidance about other things to research. Service provider is Time Warner cable. A static IP is ...
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264 views

How to find the last IP used for an expired domain name?

Is it possible to look up the last IP address of an expired domain name?
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77 views

EC2 instance with two internal IPs - using ifconfig

I am trying to allocate another internal IP to an EC2 (classic - not VPC) instance with the following command. sudo ifconfig eth0:0 inet 10.80.7.40 netmask 255.255.255.0 Here, 10.80.7.40 is just a ...
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84 views

IP based tunneling using putty

under linux i learnt to establish an ip-based tunnel using ssh, doing this: # background tunnel ip based on tun5 sudo ssh -f -N -w 5:5 root@remoteserver # setup remote: tun5 ssh root@remoteserver ...
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234 views

Advanced QoS on prioritized first packages set by ISP

I have the following problem my ISP (Fibertel from Argentina) accelerates, 'enhances' the first 6.8 megabytes of downstream transfer and it's seems the first 1.8 megabytes of upstream transfer. This ...
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296 views

iproute nexthop not working - defining multiple default gateways

I have several point to point connections and I'd like to use all of them as default gateways. I saw this link which explains how to do this using load balancing by calling ip route with a nexthop ...
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374 views

tc/netem and iptables: Delay traffic only from specified ip and port

I have a Ubuntu Router with 2 network interfaces. eth0 is the private network and eth1 is the internet. What I want is the following: All packages (mostly udp) comming from a specified private ip ...
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33 views

mod_geoip in local

I have to implement a geo location functionality on a Magento based website, thus php on an apache2 server. Obviously, in my local machine mod_geoip isn't very helpful. I was wondering if I could fool ...
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43 views

Route everything from some VLANs to a tunnel

I've set up a tunnel: $ ip tunnel add mytunnel mode gre remote x.x.x.x local y.y.y.y ttl 255 $ ip link set mytunnel up $ ip address add 172.17.10.2/30 dev mytunnel $ ifconfig mytunnel up Now, I can ...
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116 views

Is there a way to tell the difference between a direct connection and network connection

I want to configure a linux(ubuntu) machine such that when a direct connection is made with another PC my machine will enable a DHCP server and serve it an IP address, but if my machine is connected ...
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60 views

Why do I see folders of my computer under IP which I don't see in ipconfig?

At first, I could not connect to my NAS (which has static IP 192.168.1.100) from my notebook. But I can connect to it with all my other PCs. So I suspect some error somewhere in that notebook. My ...
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74 views

Amazon EC2 Windows Server 2008 + “Instance Status Checks failed”

I have Windows Server 2008 launched on Amazon EC2 Instance. While doing some configuration I changed IP address to the private IP address of Amazon EC2 instance. As soon as I changed IP address, ...
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65 views

Ip doesn't change when switching networks, although automatic ip is set. Cause of the issue known

I have two routers at my house. Both of them have DCHP server enabled. One of them is 192.168.1.1 and gives adresses from 192.168.1.2 to 192.168.1.32 The other one is 192.168.1.50 and gives adresses ...
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457 views

How to redirect a URL to a certain IP, as with /etc/hosts?

Someone on my shared server has messed with some setting such that gethostbyname('www.google.com') (PHP) gives me the IP for his website, rather than Google. I believe this can be done via the ...
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338 views

Need to Change DNS to get Gmail to Speed UP

I'm having an odd problem with gmail. My gmail is painfully, excruciatingly sluggish. Messages take a long while to load, send, frequent "#717" errors, etc. I realize that this is a rather common ...
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203 views

Constant network crashes

I have a network, and it has had serious trouble since before I started working on it. It continues to be problematic at best, and down right broken at worse. I'm pretty much at my wits end with it! ...
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45 views

IP header “Option field”

Is it true that the GRE (Cisco tunnel) header is placed in the IP header "option field" ? Are the IPSec headers (ESP or AH) installed in the "option field" too ?
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2k views

How to configure VmWare to allow hosted machine to use static IP?

There are two machines: Windows Server Windows 7 In order to install Domain Controller the machine has to have static IP because Domain Controller suppose to be DNS server. How to configure ...
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262 views

How do I eliminate IP Spoof errors in my Belkin security log?

Verified it's not coming directly from a certain computer on the network. What could be wanting to spoof the WAN besides the probable reply of malware? I can provide logs but not easy at the moment. ...
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250 views

Problem using web ip check with squid

I've got all my web traffic running through Squid using iptables: Chain OUTPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- anywhere ...
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389 views

Windows 7 gadget or app that shows stats on multiple network interfaces?

I am looking for a Windows 7 gadget or app that I can leave on my desktop/sidebar. While there are many gadgets that will display network interface info (such as current IP, gateway, etc), what I ...
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38 views

Can't externally ping my server

I set up an a Ubuntu Server with LAMP and am trying to access it externally. What I did: I set up an account at no-ip.com following this article I gave the server a local static ip of ...
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6 views

what happens to my IP my inner VPN uses if my outer VPN channel breaks down?

I want to use a VPN tunnel within a VPN tunnel. So I establish a connection first, and then another one, which will already by routed via the first. The first is the outer one, the second the inner ...
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18 views

Age of Empires II via TCP/IP Internet connection

I have made a lot of research about that, but still no luck. I'm behind a router so I got the specific ports forwaded. Once I create the game on AoF it shows my private IP, when I use GameRanger the ...
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40 views

Reply from *VPN IP Address*: Destination host unreachable. Request timed out

I have a device attached to my Netgear router (recording device with an HDD). The IP is the first in the below image: I have a VPN IP set up for it. The getter command for it returns VPN IP ...
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28 views

Very strange behavior when I try to connect using SSH. Why it works only if I copy and paste the IP address?

I am experiencing a very strange behavior. The situation is the following one: I connect to my RaspBerry Pi from my Ubuntu Linux 12.04 using SSH So I do the following operation: I go into my router ...
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45 views

Force netsh/arp binding multicast IP addres with specific MAC address

I would like to setup an binding from an IP address to a MAC address using netsh. Goal is to bond an IP address which is a multicast address (224.224.x.y) to a given MAC address (which is NOT the ...
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31 views

Can the MAC address of the USB stick broadband connection be traced together with the IP address?

Can the MAC address of the USB stick broadband connection be traced together with the IP address? Also, the mac address of the broadband stick used, computer or network card inside the laptop, etc.?
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45 views

Zombie cookies are apparently stored in different locations, inside a computer, common to all Web Browsers installed on that specific computer, right?

Zombie cookies are apparently stored in different locations, inside a computer, common to all Web Browsers installed on that specific computer, right? Does the same process works when someone is ...
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38 views

Is it possible to “ping” an embedded device connected through a JTAG interface (USB)?

I currently have an atmel at91sam7x256 embedded device that is connected to my Windows machine through a JTAG interface of USB type. I am having difficulties getting the ethernet port to work, and ...
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107 views

Unable to receive UDP broadcast packets on PPP connection

I am struggling for two days now with no success. I have two modems (do not ask, some special stuff), that uses dial up (PPP) connection. I tried this on windows XP and it works like a charm. I am ...
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49 views

Ethernet port on Linux machine not recognizing ethernet connection with embedded device

I have an atmel at91sam7x256 microcontroller that I would like to use for a TCP/IP communication. The very first step of my project is to be able to "ping" my board given its IP address. I have its IP ...
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43 views

macbook pro only pulls private ip

I'm on a mid 2011 mbp and I've now connected to two different routers and two different cable modems via Ethernet. I've tried manually assigning the IP addresses for the routers and no matter what I ...
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20 views

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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59 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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29 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 ...
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49 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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27 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 ...
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24 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 ...
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15 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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35 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 ...