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

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56 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 ...
0
votes
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 ...
0
votes
2answers
23 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 ...
1
vote
1answer
37 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 ...
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votes
1answer
15 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
votes
1answer
11 views

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

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 ...
-1
votes
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 ...
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0answers
16 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 ...
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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 ...
-1
votes
0answers
14 views

If a game sends a kick command to the client [closed]

If a game sends a kick command to a client, is it possible that the client would be able to find the packet or whatever that caused the kick? My fear is that they can take that packet or whatever, ...
0
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1answer
38 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 ...
-1
votes
1answer
18 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 ...
0
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1answer
26 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
votes
1answer
33 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 ...
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0answers
33 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. ...
5
votes
2answers
146 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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0answers
20 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 ...
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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 = ...
1
vote
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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1answer
39 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 ...
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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 ...
1
vote
2answers
70 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 ...
-1
votes
1answer
69 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 ...
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0answers
3 views

Error Messages when Inadyn reapplies IP to dynamic DNS on Raspberry Pi [migrated]

While i keep having access from outside my home network when hitting my "freedns" dynamic DNS, when typing "more /var/log/messages |grep INADYN" it gives me the errors below. I wonder what's wrong as ...
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votes
2answers
40 views

How to null route a dns zone [closed]

I have a domain that was attacked and flooding the server apache system. The only way to detour the attack is to reroute the dns off the server. Is there a generic IP like "127.0.0.1" that I can use ...
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votes
3answers
44 views

How do I know the type of connection from the IP Address? [closed]

The website GameFAQs uses the IP Address to know the type of connection and decide the level of a new user. See image: http://i.imgur.com/ZfJK8JH.png How does it determine the type of connection ...
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votes
1answer
60 views

What cause this error? [closed]

I am running two docker containers one is for hadoop basic services and other is for flume. Services are running successfully. I linked two containers env variables are automatically set by docker ...
0
votes
2answers
51 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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votes
0answers
43 views

ProxMox Internal DHCP

I'm currently searching for a solution to automate a "cloud" network routing. My hosting company offers me additional IP's for my VPS systems on my Proxmox host and I want to allocate them ...
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votes
1answer
34 views

Is a DNS Lookup performed in this case?

Sorry for this noob question in advance :-) When I enter a dedicated IP of a web server in the browser instead of a domain name, then as far as I know my computer does not need to perform a DNS ...
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4answers
59 views

Fault tolerance by using two IP with two interfaces

I would like to have a fault-tolerant setup for http requests. For brevity, let's assume we have a very simple Web-service and there is no difference which server responses. So I will have the ...
1
vote
1answer
39 views

Can't reach iis server via external ip

I am using aws from amazon and I have iis intalled on my server. I have created a test site but I can't reach it using external ip address. It is only reachable throught http://localhost- and ...
-3
votes
1answer
54 views

First Reply on Ping is Unreachable the rest is okay [closed]

please check this weird ping i'm having What may have caused this problem
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votes
1answer
31 views

Why can't I see public ip on my cloud server? [closed]

I have recently applied for a cloud-based server. I am not very experienced in system admin. So pardon me if this is silly. I was using ifconfig command to view available network interface. But I ...
-1
votes
1answer
31 views

Transfer IP address while Server Migration [closed]

I have to migrate my websites from server A to server B. Server A (213.171.207.165) I have 3 websites running on server A website1.com (213.171.207.235) website2.co.uk (213.171.207.245) website3.ae ...
-1
votes
1answer
50 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
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 ...
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 ...
0
votes
1answer
65 views

Restrict outgoing network traffic by domain name (Linux)

My root goal is to be able to prevent attackers from making unauthorised outgoing connections on my server (e.g. for connect-back shells). I can achieve this by blocking all ports for outgoing ...
-1
votes
1answer
28 views

company computers with proxy but no gateway?

Can I safely assume that client computers in my customers environment do have a configured gateway (whether static or DHCP)? It looks obvious but I wonder if this scenario is realistic: In corporate ...
0
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1answer
29 views

Unbound DNS: How to get source IP address from python mod

I use Unbound DNS with a custom python module. Based on who sends a query, I want to return different results. How do I get the Source IP from the Python module?
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votes
2answers
70 views

TTL in ping vs dig

When I ran ping google.com, I get a ttl value of 55: 64 bytes from 173.194.127.103: icmp_seq=68 ttl=55 time=16.4 ms When I ran dig google.com @ns1.google.com., it get a TTL value of 300. ...
0
votes
2answers
63 views

Ubuntu 14.04, setup server IP for datacenter, IPMI

i'm going to build a server and send it to a datacenter. I got this from the datacenter. They told me to setup the server with it. VLAN: 256 IPv4: 79.133.49.168/29 IPv6: 2a01:07e0:0000:0256::/64 ...
-6
votes
1answer
96 views

Get a static internet ip address [closed]

Whenever my router goes off my IP gets constantly changed, which is not favourable when running an online service. How can I prevent this from happening?
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votes
2answers
88 views

How to generate a Self Signed SSL Certificate bound to IP address? [duplicate]

I have my application hosted in the cloud and while demoing to prospective clients, I would like to make sure that my browser doesn't complain due to the lack of trust. So I want to generate a self ...
2
votes
1answer
33 views

Difference between ip link eth down and ip link dev eth down

What's the difference between ip link set eth0 down and ip link set dev eth0 down ? The difference between the commands does not appear to be documented anywhere.
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0answers
17 views

Is there an easy way to monitor another domain user's processes and IPs these processes are contacting? [duplicate]

Is there a way to monitor which IPs the startup processes of another domain computer is contacting as a user logs in? Both person logging in and person who will be monitoring are domain admins. Short ...
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votes
1answer
44 views

Is there a Universal/Generic Default Gateway Address in IPv4? [closed]

Is there a universal and/or generic default gateway address in IPv4? I'm looking for something similar to the way you can always reference a NICs IP address from itself with 127.0.0.1 regardless of ...
0
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0answers
47 views

Does netfilter reassemble IP fragments when packet is forwarded?

IP datagram should be reassemble in the termination of the path because the fragments may arrive from different paths. I think Netfilter need to reassemble a IP datagram to inspect the whole payload ...
0
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2answers
40 views

Private Network Interface between to MacOSX servers

We would like to set up and private single cable connection between two Mavericks servers, that also need to talk to the rest-of-the-world. The two servers for sake of argument are DB and Web. There ...