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

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-2
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1answer
70 views

Is there any rate limit when using the whois command on ips? [closed]

The data returned by whois ip-address appears to be very useful and more accurate than the data I get from the maxmind geoip databsae I am currently using. Where does the data come from and are there ...
0
votes
1answer
65 views

Static routing on CentOS through managed switch

I am a newbie in networking and I have a question regarding static routing through managed switch. I have a cluster which are connected to a managed switch. One of the node(call it head node) also ...
0
votes
0answers
42 views

Nginx - Mediawiki - Limit access to the connexion page to specified ip

I would like to limit the possibility to connect to my Mediawiki web site to a specified list of ip. The url to connect are : /index.php/Spécial:Connexion /index.php?title=Spécial:Connexion ...
0
votes
0answers
102 views

AWS Instance Suddenly Not Available in Browser - SSH and ping work

I am very new AWS and sys admin so bear with me... I noticed my website was suddenly down today and have been working to sniff out the issue. No site files were changed as far as I am aware. Here is ...
0
votes
0answers
20 views

How do I apply IP filters by domain on a multi-domain website in IIS 6?

I'm running one install of Kentico, a .NET content management system, running on IIS 6. One install is able to manage multiple websites. Within IIS, multiple domain names are pointed at the same ...
12
votes
1answer
554 views

Under what circumstances is TCP-over-TCP performing significantly worse than TCP alone (2014)?

Many admins keep perpetuating - on ServerFault and elsewhere - how bad of an idea TCP-over-TCP is, e.g. in VPNs. That even the slightest packet loss will make one suffer from at least severe ...
0
votes
0answers
170 views

Cisco 2901 Inbound NAT with local IP overload

Overview We are replacing a Juniper SSG on one of our networks with a Cisco 2901. Everything has so far been quite smooth except some issues have come up with external ports needing to be opened. ...
0
votes
1answer
77 views

Does the IP -> Ethernet multicast address mapping ambiguity matter for IGMP snooping switches?

There are 2^28 possible IP multicast addresses, but only 2^23 possible Ethernet (MAC) multicast addresses (http://technet.microsoft.com/en-us/library/cc957928.aspx), which is why e.g. 224.1.1.1 gets ...
0
votes
2answers
181 views

Reverse proxy on ALL ports, not just http?

Hello I recently asked a question about running multiple websites on different servers on the same network here multiple servers running the same thing, how? I have researched about setting up a ...
-5
votes
1answer
59 views

multiple servers running the same thing, how? [closed]

I have a little issue that I don't understand well enough to answer myself. Basically I have some servers on my home network, I am wondering how 2 servers could run something, lets say apache in this ...
-4
votes
1answer
63 views

Do anycast addresses imply IPv6? [closed]

From what I understand, as a random user on the Internet, you cannot really know if an IPv4 address is unicast or anycast. However if you ping that IPv4 from two hosts physically located on two ...
3
votes
2answers
2k views

OpenVPN: How to mitigate path MTU issues on a per-client basis?

We have dozens of embedded devices installed at customers, all calling home to our OpenVPN service. That works fine in general, but a few of our customers have severe path MTU issues. Our influence on ...
0
votes
1answer
539 views

blocking ip on linux(CENTOS) [closed]

I m blocking an ip from my centos server using iptables: iptables -A INPUT -s $ip -j DROP service iptables save however my ip is still able to access the ip and even view websites hosted on this ...
1
vote
3answers
1k views

Is it possible to configure a reverse VPN tunnel?

Basically, my goal is to have a 100% portable and independent server. I'm building it using a Raspberry Pi powered by solar panels and batteries, and it is to be connected to the internet using a 4g ...
-2
votes
2answers
704 views

Should my DNS server and DHCP server have the same IP address? [closed]

trying to resolve a 'Server not Found' error message. If I reload the page a few times it works.. So I went to the Event Viewer and saw my DNS timed out, went to CMD did the ol' ipconfig /all to see ...
1
vote
2answers
85 views

Difference Between Netstat and Access Log

When I was checking stats in SSH terminal for my VPS, I noticed that netstat and access log gives different results. When I used: netstat -anp I saw that one attacker having 32 concurrent ...
0
votes
1answer
87 views

Detect IP blocking or blacklisting

Unable to access a cloud server (Windows) from a particular public IP provided by the ISP. Tried to PING, tracert, telnet everything, nothing worked. No deny rule mentioned in the firewall. Properly ...
0
votes
0answers
121 views

DD-WRT OpenVPN Client Router not routing

I have been trying all weekend to solve this and unfortunately no success. I have a DD-WRT installed router, which is intended to be a gateway or tunnel to an OpenVPN server via the internet with the ...
0
votes
1answer
60 views

flushed IPs by mistake on UNIX how to recover from rescue

I got a problem. OS: Linux Debian 6.0 64-Bit I used this command on my root-server: ip addr flush dev eth0 I added some month agp multiply IP's and that in a false format. The problem is since i ...
0
votes
2answers
1k views

Using multiple “myhostname” in postfix

Does postfix allow to dynamically change "myhostname" ? I rtfmed a lot but did not found anything qualitative. My installation is a postfix multiple domain, multiple ip (tweaked in master.cf) and ...
-5
votes
1answer
46 views

What happens when a static IP address is unavailable? [closed]

I have several Raspberry Pis configured with static IP addresses (192.168.1.203 being one of them). I swapped out the router yesterday, and this router is using a different IP scheme (192.168.178.*), ...
0
votes
2answers
140 views

DHCP server - No IP for computers out of the domain

I would like to know if there is a way to deny leasing an IP address through my MS DHCP server to computers which are not registered in my domain. Thanks!
0
votes
0answers
44 views

Cisco ASA5505 Public IP Address

I am trying to configure a Cisco ASA5505. I am using the GUI start up wizard. When I assign the outside IP address to be a public IP address the configuration will work but after about 30 seconds the ...
0
votes
1answer
395 views

iptable CLUSTERIP doesn't work

We have some requirements which explained here. We tried to satisfy them without any success as described. Here is the brief information: Here are requirements: High Availability Load Balancing ...
-1
votes
2answers
311 views

Block incoming traffic from unresolved IP address

How can I block all the incoming traffic from unresolved IP addresses? I am using CentOS with WHM/cPanel installed. I am getting huge junk traffic and 95% is from unresolved IP addresses and only 5% ...
0
votes
2answers
366 views

RV042. Public IP on LAN port. Is it possible?

I have a RV042 router with a public static IP (XXX.XXX.XXX.42) and 4 LAN ports assigned to net 192.168.1.0/24. Can I connect a host to one of the LAN ports and assign it a public static IP ...
-2
votes
1answer
232 views

One Public IP, Private IPs, DNS Server and Multiple Servers [closed]

I have lots of unanswered questions about these topics. So, lets begin. First off all, I'm not a server and networking guru. I'm a regular PHP developer. And I've read allmost all of the articles ...
0
votes
2answers
439 views

SSH into EC2 with dynamic public IP address

Typically I set ssh aliases as follows: ssh -i ~/path/key.pem ubuntu@public-host-name.compute-x.amazonaws.com But with EC2 instances, the public-host-name changes whenever an instance is stopped and ...
-1
votes
3answers
308 views

Is it possible to transfer an IP address from one host to another?

I have a client that created over 600+ websites whose DNS records point to an actual IP address and not name servers. They are looking to move from their current host and do not want to lose their IP ...
2
votes
0answers
185 views

Private nameserver IP [closed]

I am working on a VPS. The server we are using was installed with WHM Accelerated and CPanel, the option we selected for DNS was BIND. When I came to updating the Nameservers on the Domain ...
0
votes
0answers
427 views

Unable to communicate with web proxy server on iOS

I am following the instructions on how to use a HTTP proxy with an iPhone, however I appear unable to communicate with the HTTP proxy. I have configured the settings in my phone correctly to use the ...
0
votes
1answer
50 views

Limit on IPs assigned to one interface

I have a unique application where I need to use many IPs on one server. Will Ubuntu networking crash if I assign 2048 IPs to one eth0 interface?
0
votes
1answer
43 views

Mod Security2 deactivation rule only from a specified IP addresses

Is it possible to disable a rule by Mod Security2, only for one specified IP addresses? Only for one specified IP addresses & only for one specified path ( /administrator ) ? I tried this: ...
3
votes
5answers
2k views

Can I have my DNS server and my web server on the same IP? [closed]

I just bought a raspberry pi and made it a web server. I have a network with 1 IP. I created a DMZ and I am able to access my raspberry pi web server from the internet. I bought a domain that I intend ...
0
votes
1answer
22 views

Windows Server | firewalling remote connections

In my windows server 2012, In the firewall rule for remote desktop connections I have added so that only MY IP address is allowed to connect, now of course I have taken a precaution and added a ...
-1
votes
3answers
54 views

Determine if IPs are backed by VPS

Is there any way to determine if IPs are backed by actual VPSes? For example, a VPS host receives a /22 block of IPs. He puts them on his server and requests more, but you want to verify that each IP ...
-1
votes
1answer
46 views

How do I access a site by IP on a CentOS server [closed]

I have a CentOS 6.3 server, running Apache and have DirectAdmin installed. I have created what will be a new domain, but I do not have a domain name yet. For now I have created, lets say, ...
-2
votes
1answer
62 views

Limit Emails Per Hour Per IP [closed]

Anyone knows a script or software for CentOS and Windows that can be installed onto dedicated servers with no control panel limiting emails per hour per IP or full block. Thanks in advanced!
-1
votes
2answers
1k views

CentOS: Can't add route after deleting the /24 rule from main routing table

As the title says, after deleting a rule from the main routing able I am not able to add any route till I do service network restart or ifup eth0 To reproduce the problem: ip route list table ...
1
vote
1answer
46 views

Website getting reply from old ip

I have changed a DNS entry (A record) in my AD server for a website address. But I was not able to browse the site after that. When I tried pinging and nslookup, I could find the web address getting ...
0
votes
1answer
66 views

Windows Remote Desktop Connection

I have a Windows Server 2012 and I can currently connect to it via the built-in Windows remote desktop software. I enter the server IP and password and all is fine. However, I was wondering what I ...
-1
votes
1answer
37 views

send udp packets to a destination via forwarding

i have linux machine A ( 128.247.19.194, netmask 255.255.254.0) linux machine B ( 128.247.19.165 netmask 255.255.254.0) And another linux machine (128.247.19.3 netmask 255.255.254.0) There is a ...
0
votes
2answers
91 views

Connect two servers with RJ-45 cable and iptables (without switch!)

I have two servers and server_1 is connected to INTERNET port (of server farm) at eth0. No switch. They connected with cable from (server_1)eth1 -> (server_2)eth0 : ifconfig of (server_1): eth0 ...
-1
votes
3answers
167 views

Determine if an IP is from hosting provider, or normal ISP? [closed]

I know this problem is not fully answerable, and will probably never be 100% solvable. But I am looking for ways/techniques to determine if an IP is belongs to a normal home/business user, going ...
0
votes
2answers
129 views

Web service listen on Public and Private IP address

I'm trying to get some applications of ours to listen on the Public IP address of the server. Due to the complex nature of these systems we cannot change the behavior of the applications or what IP ...
1
vote
1answer
682 views

How would I create a IP whitelist for tomcat?

I'm extremely new to tomcat but I need to configure my company's tomcat server so that we can allow restricted IP addresses only. I understand this is normally the job of the firewall but in this ...
1
vote
1answer
211 views

DNS and IP Configuration for Windows Server 2012 DC

I am getting these errors: SERVER Error DNS: DNS servers on vEthernet (Intel(R) 82567V-2 Gigabit Network Connection - Virtual Switch) should include the loopback address, but not as the first ...
0
votes
1answer
123 views

Proxy / IP clouds, how do companies acquire them?

I have seen a number of companies providing proxy clouds or IP clouds, whereby each of your web requests ultimately goes out through a random IP/proxy. You send your request to their IP and they ...
0
votes
2answers
116 views

Socks proxies over SSH show same IP

I have recently been setting up proxies via SSH on my VPS and when I connect the non main IP via a browser and look at my IP, it shows up as the main IP, is there any way i can fix this? For example, ...
0
votes
1answer
68 views

One Domain, One publish IP, Multiple servers

Apologies in advance for being a total newbie with all things infrastructure related. A little background: I'm developing a server app for an Android application. The app will communicate with the ...