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

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2answers
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SBS 2008 DNS issues in BPA

I'm gettng constant Critical Issue events in the Small Business Server Best Practices Analyser & resulting SBS Console reports that begin "The DNS client is not configured to point only to the ...
11
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5answers
62k views

How to route different traffic thru different network interfaces (in Windows)

I've searched for details on how to do this but I've been unsuccessful - I wondered if someone could offer up some advice. So, let's say I have 2 network cards (LAN and 3G in my instance), both ...
0
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1answer
69 views

Redirect DNS requests for 8.8.8.8 to a local DNS inside a LAN

I have a local network (10.0.0.0/24) with a gateway (I'll call it G, IP 10.0.0.1), a device (I'll call it N, IP 10.0.0.31) making DNS requests directly to 8.8.8.8 completely ignoring DHCP setting for ...
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2answers
765 views

My Plesk domain is pointing to the wrong IP address [on hold]

I changed the IP Address of a domain hosted on a Plesk server and, after a couple of hours, everything seemed to point to the right place and the site was loading fine. When I woke up this morning, ...
7
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4answers
982 views

CIDR Ranges for Everything except RFC1918

I'm looking for a list of CIDR blocks for "The Internet", i.e. everything from 0.0.0.0 to 223.255.255.255, excluding RFC1918 address space of 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 (yes, I know ...
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1answer
21 views

Google Dynamic DNS Wildcard Subdomains

I can't get Google's Dynamic DNS API to work for a wildcard domain. I can get defined subdomains to update their IP just fine but I always get nohost when i attempt to update the wildcard's IP. This ...
13
votes
3answers
2k views

How are IP addresses actually assigned?

I'm having a hard time understanding how a governing body assigns IP addresses, companies use BGP to advertise those IPs, and how the internet works. Then, where the hell does DNS come in? Can ...
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2answers
27 views

SNI for multi tenant load balancing in 2015

We're a multi-tenant service and terminate our SSL at our load balancers (HAProxy + Apache for SSL termination), this has caused growing pains due to dedicated IP requirements. But times have changed ...
0
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1answer
37 views

Why is linux not listing the IP I want?

I have a linux based cluster (using openMosix). The machine intended to be used as a server has 2 network cards. Cluster is working, and all machines ping to each other inside the cluster (internal ...
1
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1answer
39 views

Linux - show dropped packets form firewall

I am trying to set up a sip trunk and so far everything has gone well. The only issue I face is that the call does is not received when the iptables service is running. By stopping the service ...
0
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2answers
52 views

IP Address reassignation (unused Ip address)

Available IPv4 address blocks are exhausted and price per IPv4 address is increasing. However I read that 2/3 of IP address remains unused because they were assigned improperly at first stages. Since ...
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2answers
152 views

Failed SPF for email imported to Gmail because of client IP instead of server's in message when sent through SMTP from one local box to another

We have a linux (Debian) VPS with domain (let's say example.com with MX mail.example.com) that has SPF set up. There is dovecot+exim running. There is also Direct Admin on top of that. When I send a ...
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votes
5answers
9k views

How do I get my server off the ivmSIP/24 blacklist?

I checked my server IP using this tool: http://www.mxtoolbox.com/SuperTool.aspx It's come up on the ivmSIP/24 list. What can I do to get my IP removed from this list? I have SPF records set to ...
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votes
1answer
16 views

Access Point config through static IP [on hold]

My school have LAN cable for every dorm room, Computer want to access to inter net must set static IP and DNS. Mine as follow: IP: 10.107.31.99 Sub: 255.255.255.0 Gateway: 10.107.30.1 DNS: ...
0
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1answer
13 views

how to connect wifi devices to local server without external router? [closed]

I have a server running on a laptop which I use for live presentations (server is usb web server, on windows 10 TP), I want to be able to connect to it with tablets, cell phones, etc via wifi, but ...
5
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2answers
2k views

IP changed when EC2 instance stopped and started

I have a strange issue here regarding and EC2 instance. I had just stopped and started an EC2 instance for windows after expanding the boot drive, not after I had started the instance, the IP it was ...
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0answers
23 views

Where can I find a good Anycast Provider? [closed]

We run a VPN Service (much like unblock-us/blockless). We have two DNS servers that handle DNS requests. Unfortunately for us, they are currently at the same hosting company. We did talk about having ...
0
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1answer
43 views

IP as a method of access control? (IP Spoofing possibilities)

I'm currently investigating the use of IP addresses as a form of access control: for example, only allowing access to an Apache VirtualHost if the request originates from a specific IP address or ...
-4
votes
0answers
18 views

Unable to hide sent email headers using postfix [closed]

The guide I followed is here: https://major.io/2013/04/14/remove-sensitive-information-from-email-headers-with-postfix/ No matter what I do I cannot manage to hide specific headers, most importantly ...
1
vote
2answers
131 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
vote
3answers
890 views

How to make same server IP accessible from multiple interfaces that are not bridged on Windows 2008 R2?

My server have two interfaces (e.g. A, B) that are not bridged. These interfaces have different IP adresses (e.g. 192.168.1.1, 10.0.0.1). These IP addresses are in different subnets. I need to ...
0
votes
1answer
677 views

How to fix the TLS Server Name Indication issue under Windows XP on Nginx using a different IP

I have a server that is using two different domains with two different certificates. Everithing work fine except IE8 on Windows XP because the TLS Server Name Indication is not supported there. In ...
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votes
0answers
17 views

apache server not working with static ip

I changed my ip to a static address. However This prevents my server(apache 2.4.9) from working as my web pages don't load, I still receive internet with no problem. Is there any additional ...
0
votes
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 ...
13
votes
4answers
15k views

Can the IP address for an HTTP request be spoofed?

On a website I am building, I plan to log the IP addresses of submissions, just in case it's necessary. I don't mind proxies, but outright spoofing your IP address would defeat the purpose. To ...
0
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1answer
30 views

Varnish Under Cpanel with Multiple IPs Configuration

I have one web server runs with Cpanel&WHM and 1 shared ip adress and 3 dedicated ip adress. 3 ips are dedicated to some domains for run safely with ssl and magento. Now, i already set my ...
0
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1answer
43 views

VPS can ping host by IP but not by name

My Debian VPS can ping all host by name and IP but there's one host I can't ping by name. Ping by name failed but successful with IP However on my home PC i can ping that host by name and IP. I ...
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0answers
43 views

FortiGate 310B public ip pool into internal port

I have a FortiGate 310B with WAN port with /27 public IP pool from the ISP. The WAN port is configured with primary IP 1.1.1.1/27 I would like to provide servers within the Internal port a public IP. ...
0
votes
2answers
267 views

How to use pfSense as a firewall in order to assign url whitelists to IP groups

In a corporate network without DHCP, the temporary solution to whitelist a couple of useful sites is to change the hosts file under Windows/System32/drivers/etc/ but since modern sites tend to change ...
3
votes
3answers
12k views

Can I use nmap to discover IPs and mac addresses?

When I need to locate the IPs of devices by their mac address on a Windows system, I normally use Advanced IP Scanner (from radmin.com) to scan the network, then I use arp -a to list the mac ...
0
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1answer
37 views

How to allow only subnet for port with iptables

What i am trying to do is to DROP any packets to specific UDP port, except those one from my secured subnet 10.8.0.0/24. iptables -t nat -A --src 10.8.0.0/24 -p udp --destination-port 63210 -j ACCEPT ...
2
votes
3answers
535 views

How can order of IP addresses issued be controlled?

Every home router I've setup/used issues addresses from low to high. However, dhcpd from the Internet Systems Consortium seems to issue addresses in reverse order - ie, high to low. Is there a way ...
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3answers
37 views

wondering any rule to specify private ips?

Is there any rules to specify private ip address I guess 192.168., 169, 10* are all private ips, but I am not sure. Anyone can point out?
0
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0answers
23 views

ClearOS route configuration not working. How to setup route-eth0 properly?

I am running a ProxMox Server with ClearOS as a VM. I have the following requirements: extIP 1.1.1.1 gateway 2.2.2.2 I can not get clearos to automatically add the required routes. Here is what my ...
5
votes
4answers
2k views

Openvpn, forward packets very slowly

I rebooted my server, and an odd issue just came out. I am running on ArchLinux, the clients are Ubuntu, Android and Mac. The problem is that accessing the internet via the clients is slow, about ...
1
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2answers
42 views

Send PHP requests from dedicated IP instead of shared IP

I have set a dedicated IP for a website (using directadmin), but all outgoing php requests are sent from the server's shared IP. Result of the following code is always the shared IP. $a = ...
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3answers
445 views

Port forwarding and machine access

I have an application running in local google app engine and I am trying to expose it over the internet for some testing. I have successfully set up port forwarding in my router. Used this tool ...
0
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1answer
120 views

Identifying Google company resources versus App Engine resources

We are experiencing a problem with scraping on our e-commerce platform. It's not the scraping that is the problem per se, it's that whoever is doing it is spoofing a stale referrer full of our ...
1
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1answer
39 views

What is “the meaning” of this `ip route`?

I'm slowly learning more about IP routing and the ip toolset by investigating a VPN. After I start a particular VPN client, one of the (new) routes displayed by ip route show is 128.0.0.0/1 via ...
0
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2answers
1k views

Adding a static route to a virtual interface using configuration files rather than ip command

We statically assign our routes using the /etc/sysconfig/network-scripts/route-ethx files. This makes managing them fairly easy since we add the routes during the kickstart process (by way of ...
2
votes
4answers
1k views

Why is this China IP hitting my web site?

I have a web site that uses a couple hundred domain aliases, including franchise-dallas.info, franchise-delaware.info, and detroitfranchise.info (see more below). I have been getting ten to twenty ...
0
votes
1answer
41 views

Linux route cache seems to load outdated settings

On SLES 11 SP3 (Kernel 3.0.101-0.46) I see the following route behavior: When I set a route specific MTU once via ip route change ... mtu lock 1500, everything works as expected (setting an MTU of ...
0
votes
1answer
250 views

IIS7: Is it possible to use Forms Authentication and IP Restrictions at the same time?

I am managing a web application that uses forms authentication. Most of it (including the login functionality) was written by a 3rd party so I cannot change it's architecture. The web application uses ...
0
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2answers
1k views

understanding “ip addr change” and “ip addr replace” commands

At the moment I have following IPv4 addresses associated with eth0 interface: T60:~ # ip -V ip utility, iproute2-ss110629 T60:~ # ip addr show dev eth0 2: eth0: ...
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0answers
27 views

My NIC keeps getting the same ip 196.256.x.x [migrated]

I have a strange issue with my network card in my pc. My internal network adapter keeps getting an ip that does not come from the DHCP ADSL router that i have connected it. I have changed cable, i ...
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votes
1answer
75 views

assign Second IP in ESXi 5.5 host Centos 6.6

Hello i have just installed CenOSs 6.6 on ESXi 5.5 and I have eth0 working fine. I have internet access and I want to assign a second IP in CentOS. So purchased another ip from oneprovider.com and ...
1
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2answers
71 views

Linux: How to get a machine's IP address? [duplicate]

I'm using Linux CentOS 6.4 . I'm writing a shell script and I need to extract a machine's IP in order to use it in the script. How can I find the machine's IP? I'm looking for the "best" way because ...
31
votes
4answers
8k views

Users with Google's IP address. How is it possible?

I have a spanish website and I do not allow people from non-european countries to register and to login. Some time ago I started to receive messages from users who can not login. When I ask for their ...
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votes
1answer
54 views

Route port forward through 2 windows server 2008R2 network adapters to another network

our phone system at work is on a separate network to everything else and I need to forward a port from our gateway to it to allow our phone tech to remotely administer it. I have plugged the phone ...
0
votes
1answer
35 views

Connect remotely to an APIPA assigned host

I had the unfortunate (and not correctly planned) event of having one of my remote Hyper-V hosts assigned an APIPA address hence i cannot connect by any means on it. Funny thing is, i can RDP to the ...