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

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How do I handle a IP change affecting many servers?

Due to a location change, we have to move a number of servers to new IP addresses (from 10.X.*.* to 10.Y.*.*). We're taking the opportunity to clean up our IP allocations from a haphazard setup to a ...
2
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2answers
1k views

Stop IIS 8.5 from listing on Port 80, but still listen on port 443 for specific IPs

A have an application server that serves a number of IIS 8.5 applications on a number of IP's. Some use port 80 only, some use port 443 only, some use 80 & 443. For the sites that use 443 only, ...
0
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2answers
325 views

Can't use external IP on Hetzner VPS

I've changed my virtual server model on Hetzner recently. The new one has an external IPv4 address on which it's accessible from the internet (as it should). But I can't use this external IP in ...
0
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1answer
33 views

Run multiple websites/services on different subdomains with only one IP

I'm sure I can't be the first one to ask this, but I was not able to find anything that would fully apply to my scenario. So my apologies in advance, in case this has been asked before. I have a ...
1
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2answers
29 views

Static IP address on CentOS 7

I just installed CentOS minimal and now I am struggling to give my machine a fixed IP address. This is my ifcfg-ens32 file: DEVICE="ens32" TYPE="Ethernet" BOOTPROTO=static IP_ADDR="192.168.0.243" ...
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2answers
85 views

How to calculator IP range and subnets? [on hold]

I am trying to find exact formula for finding the IP ranges for the below sample input 10.144.26.192/28 I am getting different IP count in different portals. I used the below online IP range ...
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2answers
1k views

Draytek 2830, Multiple VLANS on Same Port

The Kit Ubiquiti Unifi Long Range Wireless Access Point Cisco SG200-08P Switch (VLAN, POE Support) Draytek 2830VN Router The Problem I need to enable Multiple VLANS against a single port on the ...
14
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3answers
72k views

How do i find out what my IP Address of my MySQL host is?

I have a free domain running at x10hosting (x10.bz), and I want to find out the IP Address of my MySQL host for it, so I can contact the MySQL database from another host. I've already added that host ...
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2answers
31 views

IP based link unreachable only from my VPS IP

I have my own windows VPS with IP address XXX.XXX.XX.XXX, i have ip based link ...
2
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1answer
1k views

Best practices for re-IP'ing / migrating servers and applications

Some of this question would be highly application-specific, but what approaches do you take when looking to migrate applications from one server/platform to another and servers form one network ...
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1answer
38 views

Access local website without dns?

I got an nginx loadbalancer setup with 2 sites. The ip address of the loadbalancer is 192.168.123.10 I want to locally access the two sites to check if everything is working. But I'm a little puzzled ...
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0answers
30 views

How to change IP-address of the Synology NAS-station when using VPN-connection?

I have set up VPN-connection (L2TP/IPSec) at our office lately. The main thing is that our employees could access Synology NAS-station from their home. VPN-connection works great, but the problem is ...
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1answer
26 views

Why a computer in one VLAN cannot get an IP address from a DHCP server in another VLAN?

Can anybody please explain as to why a computer in one VLAN cannot get an IP address from a DHCP server in another VLAN by default? Why is there a need for a DHCP Relay Agent or an IP helper, they all ...
2
votes
1answer
2k views

DNS errors after changing nameservers for Cloudflare

I don't know if this is the right place for my question, but I have a problem with my DNS/nameservers after changing the nameservers. I'm not sure if it is a problem at my side or at my webhost. I ...
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0answers
24 views

How does AWS convert an IPv6 address to an IPv4 address when whitelisting “My IP” address [migrated]

I recently had to whitelist my IP address in an AWS security group using the "My IP" option. It worked perfectly and displayed an IPv4 address, but when I looked up my IP address with Google I got an ...
1
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1answer
2k views

Finding local IP addresses using Python's stdlib under Debian jessie

I am writing a distributed systems program in python, and in this program I need to know the local ip-address... eg. 168.192.... 10.13..... etc, not 127.0.0.1 or hostname. I have found following ...
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1answer
28 views

Redirect IP to domain using SSL

I am trying to redirect my IP address to my domain which uses SSL. In my htaccess I am using following lines: RewriteCond %{HTTP_HOST} ^111\.111\.11\.111$ RewriteRule ^(.*)$ ...
4
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1answer
3k views

Why are only 3 ip xfrm policies needed for a IPsec tunnel?

I have a site-to-site IPsec tunnel up and running between a strongswan (v5.2.0) instance (site A) and a RouterOS router (site B). Everything works fine, the hosts in the two private subnets setup for ...
0
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2answers
2k 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 ...
6
votes
4answers
4k 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 ...
2
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0answers
13 views

running or building docker results in net.ipv4.ip_forward being reset

this is on a rhel6 system (docker 1.7.1 from epel). basically, everytime i do a build or a run, i can see that the net.ipv4.ip_forward sysctl gets reset to 0 - which results in the container loosing ...
54
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8answers
47k views

What is “anycast” and how is it helpful?

I'd never heard of anycast until a few seconds ago when I read this SF post. The wikipedia entry on it is quite formal and doesn't really evoke a mental picture of how it would be used. Can someone ...
1
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1answer
34 views

Can't resolve DNS for RDWeb externally

I'm having trouble accessing RDWeb Access Server via internet browser using my FQDN (https://ifodgw.abacushub.io/rdweb) externally. I am able to access it externally using the elastic ip address ...
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0answers
55 views

How to configure DNS (outside Azure) and Windows VM in Azure

I have just started getting to grips with moving existing websites in to Azure on a Windows Server (2012) VM. How do I set the DNS records (managed away from Azure) to go to the site set up on that ...
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0answers
14 views

How to make D-LINK switch IP permanent

I have procured a new D-Link Switch. I have changed its default ip address from 10.90.90.90 to a new ip address. eg - 192.168.100.101. But I am unable set the ip permanently. Whenever I power off the ...
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votes
1answer
54 views

Ubuntu Server IP address not listed in ifconfig

I am not sure why the command "ifconfig" did not show my IP address, but I was still able to reach other hosts in the same network. It happens too many times to me and I did try to search but no luck ...
1
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1answer
42 views

VMWare ESXi No internet access on VMs

Created a new VM on my brand new vmware ESXi using vspehre client 5.5 and assigned an IP to the VM but no internet access. I'm pretty sure both gateway and netmask are correct. What am I missing? ...
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2answers
57 views

Problems on migrating Parse.com app to AWS EC2 Ubuntu

I have an EC2 machine with Ubuntu installed on it. On the machine, I have installed Node.js, MongoDB, and Github version of Parse Server. I have created a database called euro. In this database, I've ...
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1answer
39 views

Binding multiple IPs to one NIC [closed]

I'm trying to set up an ubuntu 14.04 server to listen on multiple IP addresses. A range has been assigned to the server (X.X.X.146/29) and ip addr show confirms that this is how eth0 has been ...
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0answers
6 views

Serial connection over `usbip` freezes client on connection close [migrated]

I have a setup here where I share a (WIFI) connection from an Ubuntu Computer (Kernel version: 3.19) via NetworkManager to a BananaPi. An Arduino is attached to the BananaPi (Kernel version: 3.4). The ...
0
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1answer
12 views

Get client IP with Header add in Apache2

I am attempting to get the client IP in a HTTP header. I have seen a lot of references to getting this in Logs however i dont know how this translates to passing it as a header. I was going to use ...
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0answers
13 views

How do I use Client9's IPCat with IPTables

I'd like to block all ips of all datacenters in the world with this list: https://github.com/client9/ipcat But I don't know how to use that list, I'd like a bash script that checks if there's an ...
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votes
1answer
19 views

Python and java static IP [closed]

I have a Python server. Each time I change the network the IP changes. I want it to have a static IP over all networks so it can receive data without customizing the code every time. I want to do the ...
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0answers
27 views

Is it possible to check which website used the same IP in the past?

When I migrated to new sharing server I received unique IP address for my website. I would like to check if this IP address was previously allocated to some other website in the past because I am ...
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1answer
27 views

Why isn't my EC2 Instance online after reboot? [duplicate]

I rebooted my Amazon EC2 Linux Instance today, though Amazon's AWS website. Now if I go to my website Safari says it can't find the server, AWS says my IP has stayed the same. What is wrong here? ...
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2answers
2k views

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 ...
1
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1answer
103 views

Why does this “netstat -tln” output show entries for “0.0.0.0:22” and “127.0.0.1:3306” [closed]

When I run the command netstat -tln I see the following output: Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 ...
2
votes
2answers
22k views

How do I allow a non-admin user to change their IP address on Windows XP?

I have a domain connected Windows XP laptop user who is not a local administrator. I would like for him to be able to change his IP address on Windows XP since he travels quite a bit and may encounter ...
0
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2answers
68 views

The incompatibility between Cloudflare and the reverse DNS

I'm already activated Cloudflare for my website and to apply that I had to replace my domain default nameservers with Cloudflare nameservers. Now my website has to send emails to the mail servers, but ...
1
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2answers
259 views

AWS IP Forwarding

I have an Elastic IP on AWS that I want to forward to a Public IP outside of AWS. Any ideas how I could accomplish this?
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0answers
24 views

IP aliasing to a bridge interface under systemd

With Debian 8.1, how does one add a second IP address to a bridge interface under systems? Like in "IP Aliasing"? I tried it this way... In /etc/systemd/network subdirectory: File 40-br0.netdev ...
1
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1answer
93 views

Is there a way to know a visitor is coming from a Starbucks?

AWS publishes its own IP range: https://docs.aws.amazon.com/general/latest/gr/aws-ip-ranges.html I was wondering if I could obtain the same for Starbucks establishments. The end goal is to ban ...
1
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0answers
25 views

How to use virtual interface as default interface

I've got a cloud SSD VPS @ OVH, and I'd like to change the default interface used for requests. I have two interfaces: eth0 (which is the default interface) and eth0:0 (which is the new virtual ...
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votes
2answers
54 views

connecting two switches with different ip ranges

I have two switches that assign different DHCP IP addresses. one assigns 192.168.0.x to devices that are connected to it and the other one assigns 10.0.0.x ip addresses. Is this the reason I cannot ...
0
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1answer
38 views

Why is TTL increasing? (and generally behaving erratically)

Summary: TTL is not decremented when pinging hosts on a "network path" My laptop (10.10.13.10) is connected via OpenVPN to a server (10.10.13.1) which hosts several network interfaces. One of them is ...
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1answer
23 views

How to disable virtual IP on centOS

I have 5 Centos machines and 2 of them have virtual IP enable on it. This is causing problem for some of the application specifically MapR. Here i need to disable virtual IP address. I have a ...
5
votes
3answers
2k views

How to scan local network for SSH-able computers?

I am often on one computer in my house and I would like to SSH to another one, but often don't know the IP address of the one I want to connect to. Is there a way, from the command line, to scan the ...
0
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3answers
65 views

Assigning multiple IPs to the same machine with one interface

I have a server with a single physical interface eth0. I intend on running VMs on this server. To that end I have an IPv4 block which is routed to said server. What I'm trying to achieve is to spin-up ...
5
votes
4answers
5k views

Apache 2: SetEnvIf “IP Range”

In my Apache config I want to set an environment variable if I see that the visitor comes from an specific IP range. Currently I do it this way: SetEnvIfNoCase Remote_Addr "^194\.8\.7[45]\." ...
0
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1answer
54 views

Unable to Ping a server IP which is outside the subnet mask

This is the setup we are having: 2 servers which are in HA[High Availability Network] are configured with the following IP address Server 1 --> 10.54.48.x and Server 2 --> 10.54.49.x. There is a ...