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Questions tagged [ip-address]

IP address is a numerical label assigned to each device participating in a computer network that uses IP for communication.

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Networking bits to number of subnets [duplicate]

How does one use the value of networking bits of a class A address to find the number of subnet bits and host bits? For example, with a subnet mask of /22, what would be the process of finding the ...
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2answers
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Why do people use 172.x.x.x instead of 192.x.x.x [closed]

Since I was a kid, I've always installed our home network with the default 192.168.1.x/24, but whenever i log into my university's network, i notice that they use 172.x.x.x, and the same thing goes ...
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1answer
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what are the differences between addr and mountaddr NFS mount options?

I realized that the /proc/mounts include some parameters which are not shown in the /etc/mtab file and by the mount command. For instance, mountaddr. In my Linux boxes both values addr and mountaddr ...
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On VirtualBox, is there a way to set 'Reinitialize MAC address' as default?

When cloning a VirtualBox instance, is there a way to set the "Reinitialize the MAC address of all network cards" as the default? Humans sometimes forget to tick this box, with the resulting horror ...
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1answer
44 views

Change outbound IP - centos

i have a server (linux/centos) and my default ip is: 111.111.111.111 so i bought another ip (ip failover) 222.222.222.222 if i visit in browser 111.111.111.111 or 222.222.222.222 its opening same ...
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2answers
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Best way to secure a SQL VM when clients do not have static IPs

I have a VM running SQL in the cloud. Typically I would set up inbound rules on the SQL ports in Azure and on the VM's firewall, but my clients do not have static IP addresses to use in the rules. ...
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34 views

Locked out of MySQL; how to sign in from specific IP Address?

When I was managing the users and privileges for a SQL server, I accidentally locked myself out. To explain there were previously multiple combinations of users and hosts that had access to the DB (...
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44 views

Failure to ping two devices on the same subnet

Need some help with Routing. I do not understand how to make this work I have 2 Devices configured. One of the devices(somebox1) is configured with 2 interfaces and the Routing table looks similar as ...
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Configure VPS to accept FTP connections via Filezilla client using IP address

Currently I connect to my VPS using Filezilla client where I enter as hostname www.mysite.com. However, if I replace that with my VPS's IP address, I can't connect. I assume it has something to do ...
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1answer
174 views

Cannot use port 80 twice with different ip addresses?

I have an interesting problem right now. On a Windows Server 2012 R2 I have two IP addresses, say 192.0.2.1 and 192.0.2.2. On one address e.g. 192.0.2.1 a web server runs on port 80, which is ...
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IP Address and Subnet Address Validation

I am developing a code to validate that an IP and Subnet IP combination is a valid one. Say the IP address is 192.179.10.105 and its subnet mask is 255.255.0.0 - so what are the validations we can ...
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1answer
66 views

How to protect a web application from IPv6 bots?

I'm interested in this in the context of protecting a web application from bots, but I guess it applies to all kind of attacks that can be done over IPv6 by bots. In a web application, you have some ...
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0answers
30 views

Does Loopback able to support all TCP/IP protocols

Does a Windows loopback adapter supports ACD and duplicate IPs. Say we have a code that supports full TCP stack and we bridge the program to loopback using PCAP. If in case I set both the address ...
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1answer
205 views

How to manually set link-local address in Debian?

I'm trying to use manually assigned link-local addresses to have more meaningful routing tables. I disabled auto configuration for all interfaces in /etc/sysctl.conf net.ipv6.conf.all.autoconf=0 and ...
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1answer
560 views

How to block website for all countries except US and Canada

I have a website which is only for US and Canada visitors. I don't want to make it visible to other visitors. I want to use Geo targeting solution but I have a amazon hosting it did return current ...
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0answers
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Why can't I find the IP address of mongodb.net?

I am using MongoDB Atlas to host my database. I want all traffic from site destined for Mongo Atlas to use a NAT Gateway with a static IP address, so that in Mongo Atlas I can whitelist that IP. The ...
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0answers
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ifconfig displays public IP address

I've logged via ssh to remote host. When I type ifconfig output contains: ens160: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 106.120.101.39 netmask 255.255.255.128 ...
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7answers
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Assigning a fixed IP address to a machine in a DHCP network

I want to assign a fixed private IP address to a server so that local computers can always access it. Currently, the DHCP address of the server is something like 192.168.1.66. Should I simply assign ...
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7answers
466 views

What does the netmask in an IP address actually tell you?

There are several questions out there asking what the CIDR netmask is, and how it's calculated. But after reading all the top answers, I'm still left wondering, how does the netmask let us distinguish ...
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0answers
69 views

Outbound ip address of server keeps changing

When specifying an API key for Google, you have the option to restrict it by ip address. I therefore restricted my API key so that it only accepts requests from ip-address 82.163.78.2. However, ...
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10answers
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How bad is IPv4 address exhaustion really?

For years the press has been writing about the problem that there are now very few IPv4 addresses available. But on the other hand, I'm using a server hosting company which gladly gives out public ...
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1answer
114 views

.UnavailableSocketError: Inet address 127.0.0.1:7000 is not available

I tried to create a cluster with three Cassandra nodes on my machine.I have unpacked tar.gz and changed listen and rpc_addresses, also JMX_PORT.It did not work ~/apache-cassandra-3.11.1-1/bin$ ...
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1answer
199 views

L2TP/IPsec server - reserve an IP address to a certain user in AD

I have set up a rather simple L2TP/IPsec server with xl2tpd, which has a pool of IP addresses in xl2tpd.conf configured for VPN clients. I now need to assign a certain IP address to a VPN client if ...
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0answers
580 views

How to do port forwarding for VPN server

Let say my workplace public IP is 111.222.111.222. And I have a pc inside this network, and the computer ip is 10.0.0.60. I installed a SFTP server inside this pc. And in my router, I do port ...
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3answers
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are github`s IP Addresses changed?

I had an issue today where my deployment on my application servers couldn't be completed due to connection problems with github. I noticed that when I perform a DNS lookup of github.com using ...
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1answer
110 views

VXLAN format details

Learning about VXLAN I found in a document: ...VTEP1 then adds a VXLAN header that contains the VNI to the Ethernet frame, encapsulates the frame in a Layer 3 UDP packet, and routes the packet ...
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2answers
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How to forbid forwarding packets to private network addresses via interface

On my server, I have a default route to interface eth0. It has public internet address and faces ISP network. I have packet forwarding enabled, and few local interfaces/bridges with private 10.x.x.x ...
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0answers
219 views

Websocket and CDN

I have an application which replies on both http and websocket: it is hosted outside the company server farm. This application is used both via browser/websocket and, through http, from applications ...
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0answers
728 views

“Server DNS address could not be found, ERR_NAME_NOT_RESOLVED” but site IS online…

One of the websites we host through Flywheel was giving my team (we all work at the same location) this error: This site can’t be reached server DNS address could not be found. ...
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0answers
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Differentiating between OpenVPN clients using the same certificates

I have a relatively large subset of OpenVPN clients, populating the virtual network of 10.131.0.0/16. These clients are fairly similar in setup, and therefore use the same certificate. Is there ...
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2answers
339 views

Use IP Address to access another machine on local network but inside VPN [closed]

Here's my scenario. Within my Comcast home network, there are two devices, A and B. A is logged into a corporate VPN through cisco anyconnect. However, from B's point of view, A's ip address doesn'...
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3answers
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Command to Ping All a Host's NICs

We have numerous laptops here which have two adjacent DHCP reservations, one for the wired interface, and the next for the wireless. This allows simpler firewall rules by using (e.g.) /28 subnets for ...
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1answer
771 views

How do I add RADIUS clients to Windows NPS without a known IP or DNS?

When trying to add a RADIUS client to Windows NPS, it REQUIRES an IP address. What if this IP address is known? i.e. using cloud based WAPs with WPA Enterprise authentication? i.e. CloudTrax, ...
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0answers
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IP internet service rejects API request from a single address

I am looking for several days now for an answer to following issue. I am having a web based API request, which works find on all of the tested internet connections (about more than 10) EXCEPT one. I ...
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1answer
58 views

How do I allow access to a web server on an ISP that shares one IP address among all customers?

I'm a customer of a wireless ISP that shares one WAN IP address among all customers. If any of the ISP's clients log on to whatismyip.com, they will see the exact same IP address, which will look ...
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1answer
389 views

Connect by SSH to a certain device knowing public and private IP addresses? [closed]

I want to connect to a computer which is always on at home from anywhere. Suppose my router has the static public IP of 1.2.3.4 and a netmask of 255.255.255.0. As far as I'm concerned, every ...
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1answer
497 views

Azure Ubuntu VM Cannot Bind IP (public)?

I just started trying out an Ubuntu 16.04 VM on Azure. A node.js app requires listening to a port 3000 on the network interface assigned with the public IP address so remote clients can connect to it ...
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1answer
29 views

using VPN IP Address

I use FotreClient to VPN to my company Previously I was getting same IP address as i am in the company after few changes to the server and upgrading ForteClient now when I VPN to the company I still ...
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1answer
235 views

Graylog v1.1.1: Editing source IP Address to reflect the IP inside a time stamp

I wonder if you can help with the following query? I have a client (Centos 7) server (IP 1.1.1.1) in my office that sends its logs to a Centos 7 Syslog server (IP address 1.1.1.2). The syslog server ...
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1answer
657 views

Add IP range to Ubuntu 16.04 server

I'm trying to add IP range to eth0 interface on Ubuntu 16.04 server. Following this solution I've changed the configuration to this: # This file describes the network interfaces available on your ...
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4answers
2k views

Running a bash script as root on boot

i have a script that calculate an ip address (using gateway address) than change, the script work when i launch it manually with sudo sudo ./changework.sh i want this script to run during bootup ...
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1answer
68 views

In Windows what's the difference between logging in via IP Address and by File Share?

I have two users on my QNAP NAS, one with admin privileges and one with read only. If I log into the file share in Windows File Explorer via \\192.168.1.xxx I enter my credentials for read only and ...
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2answers
840 views

Is it possible to have multiple A records for mail pointing to same IP Address?

I was wondering whether we can point to same IP address for multiple A mail records. Two days ago, I bought a domain (test1.com) and a dedicated server to host SmarterMail, let's say the server's IP ...
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0answers
48 views

Server responds to an IP address which is not assigned

I have a rather out-of-date debian server, which has only one assigned IP address - 10.1.1.2 - this address is assigned manually in /etc/network/interfaces However, I just discovered that the server ...
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2answers
91 views

eth0 config and VLANs - comments please

I came across this network config on an Ubuntu server and wondered about the reasoning behind the doubled VLAN config. True to form, there's no documentation and the engineers who have worked on the ...
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2answers
105 views

Connecting to headless machine via crossover

I'm trying to connect to a headless machine over a crossover cable. The headless machine gets it's address via dhcp. What is the easiest way to give the headless machine an ip address so I can connect ...
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1answer
286 views

Exporting NFS volume to public IP

I need to have access to a shared volume from my server. I talked with my sysadmins and I knew that this volume could not be exported to a private IP address due to technical reasons. My server and ...
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1answer
78 views

IP Address vs Name Server

I had an issue where we needed to change the IP address for a particular domain. This domain is externally controlled but the web hosting is provided by myself. However, the external company that ...
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1answer
44 views

colocation of a server

Hi I currently host my site we a hosting provider and that is going well, however they have just been sold and I want to use a server (either Poweredge 6850 or Poweredge 2950) which will be put inside ...
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2answers
311 views

Networking Issue with DHCP and Vlans

We've had this issue for a while now and im at my whits end. Bit of background, we have a simple setup, we have a main vlan for the office, then a few seperate ones for development, testing and ...