Newest ip Questions

Q&A for system and network administrators

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 ...

Set IP address for virtual network interface

I have virtual interface tun0 connected to my vpn provider. I used the following commands to set it up with openvpn (route_up.sh): #!/bin/sh ip route add default via $route_vpn_gateway dev $dev table ...

EIGRP vs OSPF for internal routing

What's the difference bewteen EIGRP and OSPF for internal routing ? I know that EIGRP can only be deployed on CISCO equipement, but what's the point of using it instead of OSPF on a heterogenous ...

Google Analytics filter out public ip

I have an ASP.Net MVC application with Google Analytics. I recently added a few user's public IP addresses of the developers and other internal staff to a bunch of filters on analytics to be excluded. ...

DNS A record seems to have propagated but ping still returns old IP

I have domain that is hosted by me. The DNS provider is dreamhost. I updated the IP address of the www.domain.com to x.x.x.200 from x.x.x.198, dnscheck show that changes have propagated correctly, but ...

How to block a small IP range in csf

I'm looking for a way to block a small ip range in csf, e.g. 151.80.31.103 to 151.80.31.115 I know how to block each ip by issuing a cmmand csf -d IP, but it is a lot more effective to have a way to ...

Nginx still redirects even though I removed the rule from the conf

I was using this block for redirecting the website's IP to the actual URL: # IP to domain redirect server { # tell on which port this server listens listen [::]:80; listen 80; ...

OpenVPN applying fixed client IP addresses

Using OpenVPN with a pool of clients works perfectly and I see a line from netstat -rn that, as expected, looks like this: 172.22.0.0 255.255.128.0 10.8.0.1 10.8.0.100 291 and ...

Setting a 2-node local network with Internet access [migrated]

I want to set up a 2-node network. Both nodes are connected to a patch box and get their Internet access from there. Through their second NIC, the two nodes are also directly connected to each other ...

How to route all traffic from a specific port to a specific network interface?

I have the following setup: A computer with two network cards connected to two different routers. The first router redirects all outside traffic coming on port 5122 to port 22. So that I can connect ...

Updating a paid domain or subdomain to a dynamic ip [closed]

i was wondering if there was a service that is totaly free that can update the subdomain registered IP adress in the registry automaticly ? Like if i had a update script on the server that checks in ...

Where IP fragments are reassembled into one fragment? [closed]

Reading about IP fragments found controversy between various teaching materials. In book: "Fragments need to be reassembled before they reach the transport layer at the destination." "The ...

Ping goes through shortest prefix

The setup I have a GW with an ipsec tunnel with a range of addresses 172.17.x.x on the other side, which is mounted on top of interface ens3. The GW is connected to a subnet with prefix 172.17.3.x (...

Alpine on Linode looses it's IP after reboot

I am trying to install an alpine server on a linode computer. Here is a tutorial from linode to show how to install alpine on their hosts, I've done that so often, that I wrote a script which ...

Where is the subnet mask in the protocol stack? [closed]

I know we use subnet mask for recognize which part of IP address is network address and which part is host address. Also i Know in IP header we have source and destination addresses and there is not ...

how to add real IP on my local server

Sorry ! I'm not sure if this question is off topic or not. I am using a windows 2012 server for my official mail purpose. Now I need to setup Real IP for my server. How can I I configure it and ...

How to block access to a website by its dedicated IP address? [duplicate]

Guys I currently own a dedicated server with cPanel / WHM installed on it . I have a problem though . When I assign a dedicated IP address to a user , people can view their website by opening their ...

Prevent IIS Listing on Port 443 for Single IP Address

I am running a website in IIS and am also running another piece of software which streams media over port 1935 on the same server. The streaming software also has the capability of delivering content ...

How to create a great minecraft server like hypixel or mineplex? [duplicate]

I saw much BungeeCord servers, like hypixel or many many more servers, and i want to create one like them. I mean a bungeecord server with ftp control, custom IP, much ram, greate processor, and more. ...

Running Multiple Servers behind pfsense using single IP

I have two webservers sitting behind a pfsense router. My ISP has issued me with a public IP. I have a LAN and OPT1 interface in pfsense. Is it possible to host these two webservers behind the single ...

How do I “share/route/tunnel” an ip addres from physical host A to B?

I don't know exactly how a SDN implementation would help my situation, but maybe somebody can clarify: I have physical hosts A and B. Host A has 5 ipv4 addresses routed to it and host B has one. I ...

1 file server 2 nic's 2 PHYSICAL SEPARATED networks 2 routers same ip

I'm an IT administrator in school. I use a windows 2003(also have a windows 2008 server ready for testing) file server with 2 NICs. At the moment only one NIC from file server is connected to the ...

How to block all ip's which are not in ipset list

I am trying to block all traffic except US and Canada. I added all US and Canada IP's to ipset geoblock and when i am trying this command. I am getting an error. iptables -A INPUT -m set --set !...

One particular dedicated server can't ping one particular IP on on a VM and vice versa

I've 3 dedicated servers. 2 of them are running multiple VMs. VMs are all using multiple IPs from different countries. When the other dedicated tries to contact a particular VM using one ip, the ...

Block IP address not working windows 10 [migrated]

I am seeing a lot of traffic through wireshark as: Note I am getting a lot of sip request from 94.23.0.210 and I will like to block them. Someone is attempting a different password every time. The ...

HA configuration on Compute Engine

Is it possible to have something like this using compute engine? In my case I would like to have an external IP address as a service IP so this IP can be configured in any compute engine VM. Is it ...

Identify clients in VPN network

I have a bunch of devices (raspberry pies) which are located in different buildings and networks and are constantly sending me some data. I need a way to be able to ssh to the devices. I am thinking ...

pfSense + NAT and nginx - real IP not shown in logs

My current setup includes a pfSense firewall which port forwards public WAN traffic to a NAT internal IP. Example: 104.12.134.12:80 (WAN IP) port forwards all traffic to 192.168.1.104:80 This is ...

How to map a hostname to IP with custom logic?

I need to resolve hostnames with the next logic: r0z0n0 10.0.0.0 r10z15n120 10.10.15.120 r255z255n255 10.255.255.255 and so on. I don't want to have 16,581,375 records. It is better to use a ...

Emulate ipv4 and create a isolated network [closed]

Somebody knows how to emulate ipv4 and create a isolated network? I googled it but I didn't found anything. Do you have any idea of how to do this?

How to mark packets depending on hostname?

We can mark packets on the basis of IP addresses in the following way - iptables -A FORWARD -t mangle -s 123.2.3.4 -j MARK --set-mark 1 How to mark packets depending on the hostname? I tried this - ...

Ping is working but curl not working on a specific interface

I would like to be able to make a curl through 2 different interfaces: ppp0 (data connection) and enp3s0 (ethernet connection). ppp0 connection is mounted by pppd. This gives the following route ...

SRV record to serve a webpage at a specific IP/Port

I have a website "mydomain.ca" And I have a web management front end hosted at different IP, port 1234 I'm trying to get a SRV record to work so that whenever I go to subsite.mydomain.ca it will ...

Connect a computer through VPN with a different network

Hi, I would like to connect to a computer through a vpn in another network. My computer (Debian 7.11) is in the network 192.168.2.0/24. My gateway (192.168.2.1) is a VPN router. It connects to ...

Is it possible to have a non-all-ones broadcast address?

We've been developing some scripts recently for auto-setting IP address details on our embedded devices. The method involved setting both the IP address details (e.g., 192.0.0.100/24 and the ...

Router's IP and devices external IP are different

Is that normal if my router's IP address and external IP that my devices shows me are different? What does that mean? laptop screeshot router screeshot

Curl is working but ping is not working when specify an interface

Running on Fedora 25 in a virtualBox, I attached 2 network cards with NAT configuration. I can see both interfaces and routes are automatically created by the system: $ ip route default via 10.0.2.2 ...

How to make a professional MC server? [closed]

I am trying to create a professional minecraft server, like a server that has a great ip (eg. play.fishpadmc.hu), 16GB ram, octa core processor, unlimited server uptime, etc. And I want to do this ...

Hosting 2 websites on 1 server [on hold]

I have a HP Gen8 Server and 2 Public IP addresses and 2 Windows Server 2012 that on each one I have a website through VMWare Workstation. How can I set a public IP address for each of my websites? I ...

Cisco Routers and ACL with minimal interruption

I have a Cisco 1921 router in which I have configured the following access control list: EDIT access-list 199 deny 192.168.1.24 access-list 199 permit any any I want the ability to remove and ...

Domain Name pointed to name servers in US and then forwarded to a public IP in Asia

We are trying to host our website in our office. We have a very fast server with a public IP and an opensource cPanel installed. Our domain name is registered with a different provider and I couldn't ...

Mobile ip assignement using NAT are location dependent?

This post explains very well the logic behind ip assignation for mobile devices but as far as I understand 1 IP can be assigned to various smartphones by the ISP using NAT. I would like to know if ...

Editing Cisco Router Extended ACL lists

I have a Cisco 1921 router where I am using outbound extended access list. Whenever I edit my access lists, it results in losing all IP traffic. I will have about 3 deny statements, and then end with ...

How do I get the name of the host (based on ip)? [closed]

I am not going to disclose the public IP address here , but is there a way on to get the name of the hosting PC / Server . Thanks

How to configure DNS Zone to use a different IP as Email server?

I used to have my web and email services on the same machine, on the same IP address, so my DNS Zone was relatively simple. Now, I am setting-up 2 separate machines, for Web server, and for Email ...

Can domain records exist in multiple registrars?

I have a client that wants to maintain control of his domain (fair enough) - he also wants to maintain control of his MX records (fair enough). He is with CrazyDomains and the current records kind ...

How can i use port forwarding to multi ip

I have two IPs (public IPs) eth0: 1.1.1.1 and eth0:1: 2.2.2.2 I'm using portforwarding. ssh -D 1080 root@2.2.2.2 But when i go to check ip site (ip2location) then my ip is: 1.1.1.1 I want to use: ...

Change Kerio Control's interface IP via shell

We are using Kerio Control Software Appliance in the datacenter. Recently, the IP that our external interface was bound to became unavailable and datacenter has issued us another IP. Since Kerio ...

make a site available on an intranet (and in the development site) but deployed externally on a godaddy vps

Hi Im a web developer at a small agency and we created a web app for one of our customers and we have hosted that app on a godaddy vps, but the client need to make that web app available only in its ...

Is it possible to visit one of the websites that are sharing a same IP by IP address?

I hosted my several websites on Linode, they are all sharing a same IP address. I use webmin/virtualmin to manage my server and websites. Is it possible to visit one of the websites by IP address? ...
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