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

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2answers
103 views

Router see IP alias? [closed]

On my Win7 host machine, I have two VMs which I test network/server stuff. On one machine I created an IP alias using the following commands from ...
-1
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2answers
69 views

Is recipient's MAC address necessary for TCP connections across the internet? [closed]

I want to estabilish TCP connection over the internet between 2 computers which are in different local networks (the local networks use wifi). I have looked for description of TCP protocol, ...
2
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2answers
51 views

Are only IP-Addresses Blacklisted or also Domains?

Unfortunately one of the forms of my website was used to send completely sensless spammails. As I found out through "http://mxtoolbox.com" that my IP-address is listed on two blacklists, I want to set ...
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1answer
51 views

How can I ensure HTTP requests from many servers goes through one IP address? (i.e. client-side load balancing)

We have many machines that for security reasons need to communicate through a somewhat static set of IP addresses. ("Somewhat" meaning, manual maintenance once in a while is okay, but new IPs cannot ...
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votes
1answer
56 views

How do I ensure a REST API does not have a bottleneck when it receives requests? [closed]

I'm creating a REST API that will listen on a public URL and accept uploads of large amounts of data. I understand how to scale software processes using message queues, but what I don't understand is ...
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3answers
87 views

How many packets will it take to send particular data?

If I know the maximum packet size is 1500 bytes say for Ethernet frame v2 then for example I want to transfer 1 KB over the Internet which is roughly 1024 bytes. Will the packet be split into many ...
0
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0answers
73 views

Can a source send two fragmented IP packets at the same time?

I'm developing an app that does NAT between a virtual TAP interface and a physical interface, and I'm not sure how much buffer should I allocate for IP fragmentation. According to Wikipedia the ...
0
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2answers
2k views

how to unblock my https website when its blocked by a specific country?

I have a website, more like a webservice that serve some applications, my service has been blocked in a specific country, only the https version is blocked. i need to keep using the ssl certificate ...
1
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1answer
52 views

DNS propagation: A record and IP change on domain panel and VPS?

I'm moving my website from a VPS to a dedicated server. In my Domain administrative panel there is a DNS zone where i've changed the A record from the previous IP address to the dedicated server's ...
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2answers
62 views

Domain/IP mapping behind router

I have a small office in a larger office building. We use a "shared" internet connection maintained by the building, behind several layers of LAN infrastructure that we do not control. I want to ...
0
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2answers
51 views

How do proxy servers change their IPs? [closed]

A lot of proxy servers say that they change their outgoing IP addresses every X hours (many seem to do it twice daily). How they do this? Is it something that a hosting company would do, or an ISP?
1
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1answer
44 views

How to point a domain to a dedicated ip

In my domain account while trying to update the nameservers , they are asking for hostname and ip. I have ip alone , how to create a host name. I am using windows server 2003 .
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0answers
40 views

Binding of IPs not working

I have two IP address ranges in my server. CentOS 6.2 The first one, is ok and working Then second range is suposed to be binded to eth0, using the cloning resource available in RedHat systems. My ...
3
votes
1answer
77 views

MPLS: choice of initial label for an incoming packet

At the entry of a MPLS tunnel, which packet fields are used to determine the label of an incoming packet? Here it says that there are other attributes that are taken into account besides the IP ...
1
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2answers
226 views

What is the KRYPTOLAN protocol?

I've searched for a while and can't seem to find any information on what KRYPTOLAN is. For the transport layer, IP protocol number 0x41 is assigned. In addition, ports 398/udp and 398/tcp are also ...
0
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1answer
62 views

Assign a public IP address to new Amazon Instance

My Amazon Instance got terminated accidentaly. This Instance was having an IP address associated with itself so that it can be accessed from internet. Now I have created another Instance from the ...
0
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1answer
236 views

tried to spam postfix, doesn't log IP address

I've had some serious spam issues with my local postfix installation, until I found out that there was a postfix user wich was allowed to relay mails (I still don't know why this was possible in the ...
1
vote
1answer
103 views

2 servers with 2 ip adresses cant ping each other

I rent 2 root servers from my provider that run Ubuntu 12.04.01 LTS. I ordered a second ip for each of them and configure them in /etc/network/interfaces as follows: iface eth0:1 inet static ...
0
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3answers
77 views

Can I set up port forwarding to emulate not just a port but another IP address?

I am running a proprietary Windows application which functions like a server. You install the program, and then it broadcasts itself over port 13083. The program is web-based, so it's accessed ...
3
votes
3answers
228 views

Why does operating system need to know subnet mask? [duplicate]

If I understand correctly, the operating system gets subnet mask together with IP and other stuff from the DHCP server. And this subnet mask seems to be important for router because it knows if packet ...
0
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4answers
252 views

IP address and geolocation

I very well know that this has been asked quite a number of times here itself but folks please give this question a read. Plus I'm giving my best to phrase this question, hence the Prelude/Question ...
0
votes
1answer
285 views

Add IP address to Ubuntu 13.10 and separate webserver requests

I've got a Ubuntu 13.10 VPS server with 1 IPv4 (111.111.111.111) (and 1 IPv6 address). I recently requested an extra IP address (222.222.222.222) but I can't seem to figure out how to add the new IP ...
1
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1answer
67 views

IP translation for proxying IP web address with no dns entry

We use a dns based proxying system, which proxies certain addresses based on the dns entry, so for example for website1.com the dns return the IP if the proxy, and the request is sent though that, but ...
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votes
1answer
23 views

rerouting name to ip on local network [closed]

i created an intranet (lamp) and now i have to make it visible using this url intranet: the solution i found was to put in each computers (mac, windows) this in the hosts file using the ip ...
1
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1answer
95 views

Monitor a ucarp VIP using another interface

On Debian machines, I would like to setup a VIP between two nodes for a public IP, but I would like to avoid using three IP addresses to make ucarp communicate between the two nodes. Can I set it up ...
1
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2answers
63 views

Make NginX serve different pages depending on the IPv4 encoding base

You can access google on 186.215.155.54 , 0xBAD79B36 or 3134692150 (remember to put http:// before if you want to try). How is the base conversion handled by the browser? Is there any way for NginX ...
2
votes
1answer
138 views

How to View the IP routing table

How can I see ip routes I've added with ip route add default via x.x.x.55 table test1 for example I added 199 test1 and 198 test2 and 197 test3 to /etc/iproute2/rt_tables then I run: ip route add ...
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0answers
39 views

squid as parent of url filtering

I have this situation: client -> url-filtering -> squid -> internet The squid proxy sees all clients as a single IP ( of url filtering) so I have a lot of connections from a single IP. Squid is the ...
0
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1answer
28 views

Associate Multiple IPs to a EC2 instance

I have learned that one can associate multiple IP address to an instance in Amazon VPC. My question now is, I run an application (CLI based script which sends HTTP requests) on the instance and want ...
0
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1answer
120 views

Server with multiple ipv4 addresses adding ipv6

I've got a dedicated Centos 6.5 server with nginx and 2 ip-addresses (these are 2 ip(v4)-failover addresses from OVH) for hosting 2 different websites on the same server. I want to add ipv6 addresses ...
3
votes
2answers
136 views

New IP addressing from ISP

We just got a new Internet fiber service. Our ISP gave us a /30 for WAN and /29 for LAN? I have never seen this when setting up a new ISP service. I was always given a block of ip addresses (if ...
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0answers
21 views

graceful tunnel remote change

I want to solve a networking problem: Say I have 3 machine A, B, X in a local-network, where user have access to network resource of X's network interface tunX, which is a tunneled interface connects ...
1
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1answer
72 views

Move IP from one server to another without disruption

I have an internal DNS server running on a VM. I've rebuilt the server from scratch in a new VM, and I want to cut over from the old to the new at some point. In order to do this, I'll need to take ...
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0answers
169 views

Public IPs behind Watchguard Firebox for deploying Lync

We have an XTM 515 Firewall in our company and are in Lync 2013 implementation phase. For the Edge Server we need 3 different IP addresses. Our ISP provided 8 addresses in 2 different subnets. For ...
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1answer
74 views

How to return a 200 to a specific IP address

I've got some webhealth checks that mainly see if the server is still alive. At the moment when each get is performed it spins up an instance of the web app on the server. I'd like to just have ...
0
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1answer
4k views

Setting 2 IPs on Ubuntu 12.04 with two network adaptor card

There is a VPS runing ubuntu 12.04.3 server on vmware esxi 5. It has 2 valid static IPs and two network cards eth0 and eth1. but only one of the assigned ips is pingable from outside. (both ips ang ...
1
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2answers
209 views

Windows Server 2008 using wrong IP address in IIS7

I have a Windows Server 2008 box with two static IP addresses (192.168.xxx.120 and 192.168.xxx.118) running IIS7 thay hosts ~30 websites. The DNS server on the network is configured to point website ...
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1answer
192 views

Second IP for VPS on VmWare ESXI?

I bought a VPS Server run on vmware ESXI and this server just had one IP; Now I decided to ask from the reseller to give me another IP; He says in order to do that he have to remove my account and ...
0
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3answers
920 views

Restrict Tomcat Webapp external access by IP

I am successfully able to access my webapp using the external IP for my server. However I would now like to restrict access to the server by IP. I have added the following in conf/server.xml: ...
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5answers
118 views

how to identify IP address on eth0 when console isn’t available

I need help about the following I have very old Linux server with one IP address, unfortunately I can’t to access to Linux machine VIA console and I not remember the IP address So I now thinking ...
0
votes
1answer
63 views

Finding ips and hosts in a LAN . Different results

I need to scan a LAN and match hosts with ips. I used nmap -sL 192.168.1.* and i got a list of hosts and ips as i wanted. But when i checked using ipconfig on a few machines i saw that resuts form ...
0
votes
1answer
136 views

Several Server Errors (No database connect, can't create TCP/IP socket etc

My server stops taking requests on my website today. It works for some time, but then the server just stops working and throws several errors: 500 Internal Server Error Warning: mysql_connect(): ...
1
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1answer
81 views

Prevent hijacking IPs in a bridged network (KVM/libvirt)

Is there a solution to prevent a VM user assign/use IP addresses he doesn't own but are routed over the same bridge like his own addresses? The current setup looks like this with libvirt and KVM: ...
-1
votes
1answer
609 views

Microsoft , Hotmail , Live , MSN, Outlook , unable to send emails and no support received from microsoft in 3 months we are trying asking for that [closed]

Ok this is somenthing unbelievable, we have a website, users sign up and receives links to confirm they signed up BUT: 1 - microsoft blocked our IP (no one with microsoft email account can receive ...
-1
votes
1answer
910 views

How do I set up domain names for IP's on my LAN? [closed]

I have a LAN with 50 clients and my company has made me do a local WebApp. This is new territory for me, but as I see it, the individual internal IP's are regulated by MikroTIK. I was wondering, how ...
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votes
1answer
305 views

How to connect devices behind Comcast router/modem with devices behind wireless router [closed]

I know this is going to seem like a simple solution but I have been unable to find a clear answer through Google. Simple office setup: I have a Comcast modem/router that has 4 hard wired ports. In ...
1
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1answer
52 views

Lost as to what I'm not doing in setting up a home lan network [closed]

I'm a PC repair tech and this is a problem I've recently been trying to troubleshoot for a customer. Upstairs they have the main router which servers as the gateway and router, both hardwired and ...
0
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0answers
127 views

Why is an ack response being sent to the wrong gateway?

I was trying to determine why a packet forwarded by iptables to my internal lan is returned on the wrong gateway. Having investigated this further, I determined that, at least in the case of one of ...
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votes
1answer
531 views

NAT mode virtual machines shows same IP address [duplicate]

I have two virtual machine running on a virtual box. VM 1 and VM 2 The network is in the NAT mode (default). Both the machines have the same IP address.So I assume that they are in two different ...
0
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2answers
397 views

Separated virtual networks with same subnet range with 2 interface

I'm having some problems with routing with the following: I have a server with 2 interfaces. It has 1-1 alias contains the same subnet. the 2 interface is connected to 2 switch, which are separated ...