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Questions tagged [ip]

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

IP (Internet Protocol) is a protocol which encapsulates data for transit across the Internet and encodes its source and destination addresses, among other parameters. It implements the network layer (layer 3) of the OSI model.

Questions related to IP (addressing, routing, and protocol issues) fall under this tag; questions merely containing an IP address do not.

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Excluding four IP's from a /32 static route

I have a Cisco ASA routing a /32 of public addresses (non RFC-1812) through a private link. When the device sees the destination address it selects the private route instead of going out over the public network. This works great but I am now trying…
Justin
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Ubuntu second static IP, ifconfig, /etc/network/interfaces

I would like to add a second static IP to my local Ubuntu 11.10 desktop machine and have it automatically available after rebooting. So far I am successfully using ifconfig to to temporarily set up an alias for my primary network interface: #…
Schmoove
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Can I use the CLI to reset an IP address from a different subnet?

I'm working with a small office network which has fifteen devices on 192.168.2.x. They want to add a print server to the network. Simple enough, except that the print server seems to think it's 192.168.23.8. A firmware reset will change the print…
dwwilson66
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NAT and ISP Subnet when load balancing on pfsense?

I have a pfsense box that I'm trying to plan the configuration for. I am going to be load balancing two ISP's, each with their own /29 static IP subnet. The question I have is in relation to the way those IP's are associated with workstations on the…
dannymcc
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Dell Equallogic SAN - 4000 series to 6000 series connectivity issues

I have a 4000 series in production with two physical NICs and a group IP. I have a 6000 series in a DR site with four physical NICs and a group IP. 4000 series NIC1: 10.0.12.2 4000 series NIC2: 10.0.12.4 4000 series Group IP: 10.0.12.3 6000 series…
DavanW
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Linux - set an interface to not fragment packets

I am using a Linux as a router. The machine has two NICs. This router will be used for experiments, so I have set one of it's interfaces to have a MTU that is lower than the standard (let's decide the MTU has been set to 200, for the sake of…
summerbulb
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Is it possible to rent an IP address to mask the server real IP address?

A customer would like to lease an IP address and point it to a dedicated web server with the intention of "masking" the server's IP address so it would be difficult to tell where the site is hosted. I found a company that leases IP addresses here:…
net-girl
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Trouble with site-to-site OpenVPN & pfSense not passing traffic

I'm trying to get an OpenVPN tunnel going on pfSense 1.2.3-RELEASE running on embedded routers. I have a local LAN 10.34.43.0/254. The remote LAN is 10.200.1.0/24. The local pfSense is configured as the client, and the remote is configured as the…
JohnCC
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DNS subdomain catch-all linking to my external address

First of all, I'm not that into DNS, so maybe the answer to this question is very obvious, sorry in either way. What I want is this: A DNS record which catches all non-existing subdomains on my site and link them to the external address of my site.…
Martin
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LameUser trying - apache2 webserver authentication - IP range to access without pass prompt others with it

I have (maybe silly) question regarding the apache2 webserver and security - I am trying to archieve this: Users connecting from 192.168.1.24 not to be prompted for password and allowed Others asked for username and password if correct then connect.…
Mikee
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Can IP fragments be overwritten?

Suppose that I want to send a very large chunk of data using IP, and that the data gets fragmented into 100 IP datagrams. By the time I have sent the first 90 datagrams, I realise that I would like to tweak a few bits in the payload of the 3rd…
Randomblue
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Is TCP/IP encapsulation MSB or LSB?

Application data sent over TCP experiences multiple encapsulations: The application data is encapsulated within one or many TCP fragments The TCP fragment is encapsulated within one or many IP datagrams The IP datagram is encapsulated within an…
Randomblue
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How to access localy installed Screwturn Wiki from networked machines

I installed Screwturn Wiki using WebMatrix 2 and this tutorial: Installing ScrewTurn Wiki using WebMatrix, Now I have Screwturn Wiki running on my machine at http://localhost:4422/Default.aspx but have no idea how to allow other users on our network…
Fuzz Evans
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iptables dynamic NAT, SNAT: force overload on exhaustion

Is there a way to specify the use of iptables NAT'ing where you can use SNAT for a pool of outside addresses, but when the last IP is about to be used it is used as an overloaded outside IP? I remember hearing about this with Cisco equipment. But as…
Jim
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How to make all of my IPs works in HyperVM XEN?

I've installed HyperVM on CentOS 5.8 final to make XEN VPS. I have 5 IPs, and added them to an IPPool. They are from *.123 to *.126. But when I add Virtual machines, just the first one (which indicate to *.123 ip) works well. I mean I can ssh to it…
user758667
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