-3
votes
1answer
65 views

How can my server announce its presence to everyone in the network [closed]

The situation is as follows. I want to have an application running on a server. All of the desktops in the company has to connect to it. But I do not want the IP address of the server to be hard coded ...
-2
votes
0answers
29 views

DNS server won't work! [Bind9 running on Debian 7; virtualized through Proxmox 3.1] [migrated]

First I'd like to thank everyone in advance for helping me - communities like this are exactly what amatuers like myself need when faced with perplexing issues. I've recently begun virtualizing ...
1
vote
1answer
26 views

DNS caching for a DNS name with two different IP addresses (internal vs. external)

Suppose we have a DNS entry ocean.corp.tld internally pointing to an internal IP address on our corporate network, and externally pointing to an external public IP address. Essentially same DNS name ...
-2
votes
1answer
51 views

Out of IP address on DHCP 192.168.1.2 to 192.168.1.254 [duplicate]

Hi I have 250+ workstations on IP's from 192.168.1.3 to 192.168.1.254 subnet 255.255.255.0 gateway 192.168.1.1 and our server on 192.168.1.2 We are expanding and need to add another 254 IP's but this ...
1
vote
2answers
14 views

Can a cisco router execute a command itself?

I'm experiencing a problem with my Cisco router 1900 Series, the router sometimes stop routing packets, and when i log into it and show the running-config i see no ip routing executing ip routing ...
1
vote
0answers
45 views

All nework interfaces hang for seconds while one interface goes up/down

I am building a client/server application that uses several network interfaces in parallel for redundancy, and I have noticed that while one network interface goes down or goes up, the communication ...
0
votes
0answers
60 views

ZNID24xx-Router public IP

I need to make my public IP the same as my internal one. My router is ZNID24xx-Router, and i'm trying to change the config of port forwarding, but i'm not certain this is the right thing to do and i ...
-1
votes
3answers
53 views

What happen when I assign 2 IP on one NIC? [closed]

What happen when I assign 2 IP on one NIC? e.g. I have one physical NIC (eth0) and I assign on this interface 2 IPs from different network. e.g. auto eth0 iface eth0 inet static address ...
0
votes
6answers
125 views

How can I ssh to a firewalled server without a static IP?

I need to SSH into a client server that has an IP whitelist as part of access control. I don't have a static IP - sometimes I work from home, sometimes the library, sometimes a coffee shop, etc. How ...
1
vote
1answer
315 views

ping works but ssh fails

machine1 IP: 172.30.11.119 machine2 IP: 172.30.11.120 machine3 IP: 172.30.11.121 machine4 IP: 172.30.11.122 Note: These machines are connected to LAN. I have configured the static ...
0
votes
2answers
98 views

Any gotchas when using the lowest and highest IP addresses in a small block?

OVH offers additional public IPv4s in blocks as small as /30, that is 4 IPs total. As I understand it, strictly speaking two of those are supposed to be unusable. However, OVH allows me to route those ...
1
vote
1answer
85 views

Bridging is breaking the server: KVM configuration

I'm pretty new to networking and just can't get my head around this. I'm trying to setup KVM-Qemu so I can run some virtual machines. The instructions I'm following are telling me to use eth0 and ...
1
vote
0answers
106 views

Proper way of setting gateway outside of subnet on FreeBSD?

I have a VPS running FreeBSD 10 and it is located in OVH's BHS datacenter. The gateway for my VPS is not in the same subnet as my IP address and when I went to set the gateway the usually way, it ...
0
votes
0answers
25 views

Jumphost VM not able to communicate with LAN

I have setup a jumphost VM on WinXP. It has 2 NICs. NIC1, which is the LAN, has the following IP settings: IP: 10.0.0.1 /24 (No default/ DNS configured) NIC2, which has external connections, has ...
-2
votes
1answer
40 views

SOHO Routers and Non-Standard CIDR Blocks [closed]

I recently learned about private networks. From what I understand there are three address ranges for use in private networks: 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 If this is the case, then why ...
-2
votes
1answer
46 views

why return different sequence of ip addresses? [closed]

When I used nslookup to query google.com twice, I got same ip addresses but different order, why? These are return: Server: 129.173.1.100 Address: 129.173.1.100#53 Non-authoritative ...
1
vote
2answers
154 views

Arbitrary loopback ip addresses besides 127.0.0.1

I am developing a web app that has to produce different output based on ip. For testing and during development it would help a lot if I could have more loopback ip addresses besides 127.0.0.1. Is ...
0
votes
3answers
90 views

Should I get extra IPs?

This is my proposed setup using OpenVZ containers (hosted on Proxmox): CT 1: MySQL and nginx. Hosts all databases and multiple websites(domains). Used ports are 80, 443, 3306, 8080 CT 2, 3, 4: These ...
-2
votes
1answer
59 views

Which cloud providers which let you spoof an outgoing IP address, and how? [closed]

I have a web application which is load-balanced using LVS which has been hosted within my organization's network to this point. We've used both direct and tunnel routing within LVS, which results in ...
-3
votes
1answer
60 views

Bandwidth requirement to live broadcast an event on the internet [closed]

I am assigned on project to live broadcast an event on the internet which may have 50,000 user s. This will be a broadcast so all users will see same live video. My query is what would be my bandwidth ...
1
vote
0answers
83 views

What could be the cause for outbound TCP/IP traffic beeing blocked while ICMP is still working?

On a Windows Server 2003 there is a strange issue. Every 6 hours the server don't accept outbound TCP/IP traffic while inbound traffic working fine. If the problem occurs I can connect with RDP to ...
1
vote
2answers
68 views

RTP Stream is Visible from Internal IP but not from Public IP

I'm trying to stream an RTP stream to a port on an external ip. When I attempt to load the stream using the internal ip on the pc itself, everything works. When instead I try to stream using the ...
0
votes
1answer
70 views

How should I search for IP conflicts in static networks?

We have two physically separate static networks with the same subnet, containing a total of some ~100 windows computers (servers and workstations) that we want to merge. If configuration is done ...
0
votes
2answers
183 views

what will be the primary IP address of my system if i have two NIC can i change it?

I have two NIC configured on VM's one IP is assign by DHCP on 172.26.43.XX VLAN and 10.10.10.XX is static ip I am installing cloudera beta 5 on these VM, while detecting the host cloudera is ...
-1
votes
1answer
39 views

How can I ensure HTTP requests from many servers goes through one IP address? (i.e. client-side load balancing)

We have many machines that for security reasons need to communicate through a somewhat static set of IP addresses. ("Somewhat" meaning, manual maintenance once in a while is okay, but new IPs cannot ...
-1
votes
0answers
20 views

Is there any way to access local computer apache with a specific domain? [closed]

I want to access my local Apache hosted files from outer world via domain or specific IP address without using Publuc IP, No matter my local machine is in proxy servers or switches -> router. I am ...
1
vote
1answer
88 views

2 servers with 2 ip adresses cant ping each other

I rent 2 root servers from my provider that run Ubuntu 12.04.01 LTS. I ordered a second ip for each of them and configure them in /etc/network/interfaces as follows: iface eth0:1 inet static ...
3
votes
3answers
187 views

Why does operating system need to know subnet mask? [duplicate]

If I understand correctly, the operating system gets subnet mask together with IP and other stuff from the DHCP server. And this subnet mask seems to be important for router because it knows if packet ...
0
votes
4answers
187 views

IP address and geolocation

I very well know that this has been asked quite a number of times here itself but folks please give this question a read. Plus I'm giving my best to phrase this question, hence the Prelude/Question ...
1
vote
1answer
64 views

IP translation for proxying IP web address with no dns entry

We use a dns based proxying system, which proxies certain addresses based on the dns entry, so for example for website1.com the dns return the IP if the proxy, and the request is sent though that, but ...
2
votes
1answer
109 views

How to View the IP routing table

How can I see ip routes I've added with ip route add default via x.x.x.55 table test1 for example I added 199 test1 and 198 test2 and 197 test3 to /etc/iproute2/rt_tables then I run: ip route add ...
1
vote
0answers
21 views

graceful tunnel remote change

I want to solve a networking problem: Say I have 3 machine A, B, X in a local-network, where user have access to network resource of X's network interface tunX, which is a tunneled interface connects ...
1
vote
5answers
109 views

how to identify IP address on eth0 when console isn’t available

I need help about the following I have very old Linux server with one IP address, unfortunately I can’t to access to Linux machine VIA console and I not remember the IP address So I now thinking ...
0
votes
0answers
33 views

CONNMARK on rewritten packets

I have tried to ask this question on superuser, for it, being a custom setup, belongs there, but that got no answer even with a bounty. I have a host, on which I rewrite saddr and daddr of IP packets ...
1
vote
1answer
51 views

Lost as to what I'm not doing in setting up a home lan network [closed]

I'm a PC repair tech and this is a problem I've recently been trying to troubleshoot for a customer. Upstairs they have the main router which servers as the gateway and router, both hardwired and ...
-4
votes
1answer
118 views

NAT mode virtual machines shows same IP address [duplicate]

I have two virtual machine running on a virtual box. VM 1 and VM 2 The network is in the NAT mode (default). Both the machines have the same IP address.So I assume that they are in two different ...
0
votes
2answers
85 views

Controlling 2 DHCP servers in one network

In my customer network, we have 2 DHCP servers. One is fully controlled by me and another by a different vendor. I want to make sure a set of devices (my devices) when connected, should get IP address ...
2
votes
2answers
595 views

Watchguard firebox: public IP addresses behind firewall with as much usable IP addresses as possible

Our ISP assigned us 16 public IP addresses that we want to assign to hosts behind a Watchguard firebox x750e. The IP addresses are: x.x.x.176/28 of which x.x.x.177 is the gateway. The hosts will be ...
0
votes
2answers
39 views

Session automatically resolving to secondary IP

I am using Debian 6 - 64-bit and this is what my /etc/network/interfaces file looks like auto eth0 iface eth0 inet static address PrimaryIP gateway X.X.X.X netmask 255.255.255.0 auto ...
1
vote
1answer
77 views

Remote_Addr doesn't work after apache upgrade

I just upgraded from apache2.2 to apache2.4, suddly Remote_Addr prints 127.1.1.0 instead of client ip. I have apache behaind nginx with the following settings: proxy_pass ...
0
votes
1answer
61 views

best approach for small network cut off from main domain

I'm not an IT guy so please bear with me, any helpful approaches for this would be great. My team and I are working in a field project that essentially made us physically move to a new location, ...
5
votes
4answers
286 views

Static IP vs DHCP Reservation

When setting up a network in need of static IP addresses I've come across at least two ways of doing so. A: Router/Gateway In particular, on my Buffalo router, under DHCP Server, there is the option ...
-1
votes
1answer
81 views

Need help routing Cisco network- IP routing [closed]

In the above network, can you help me configure routes so the computers on the left can see the computers on the right, and vice versa? I know the syntax of the command is ip route {network ...
0
votes
2answers
81 views

Configure two webservers on the same LAN

I am trying to setup the network for a small business using a network configuration I am new to. The business has one public IP(135.x.x.x) and wants to use separate machines for its website ...
4
votes
1answer
253 views

Is IP over FC still crazy complex? [closed]

In the link below, it is explained that 4 years ago IP over FC was crazy complex: How do I set up IP over FC? Is that still the case on CentOS 6?
1
vote
2answers
88 views

private network address differences?

I know there a 3 different class of ip address reserved for privete network. they are 192.168.0.0/16 , 172.16.0.0/12 and 10.0.0.0/8. in our company we use 192.168.0.0/16 for many things, ...
2
votes
3answers
319 views

Multiples ip address on interface. I want to specify one of them for output

I ran curl on curlmyip.com, and I got the wrong output ip address. My systemd service file is: [Unit] Description=Wired Networking Wants=network.target dibbler-client.service Before=network.target ...
-4
votes
1answer
114 views

How do you link two servers under the same IP adress, but under different ports?

Say I have Server 1 and Server 2, both are in charge of running a variety different services (Web-services, file hosting, etc.). Both servers servers are linked together by a D-Link DAP 1522, which ...
1
vote
1answer
82 views

Allow child network to use parent network for internet access - but don't show parent network clients [closed]

I have two Linksys wifi routers. The first one (orange network) with the IP address 192.168.0.1 is connected to the internet. The second one (green network) with the IP address 10.10.10.10 is ...
-2
votes
1answer
52 views

Look up the servers ips and compare them

For the self study purpose, I want to understand my company's network. I click Network in my desktop, there are three servers: "hqiz01.corporate.my.com", "ISLAND01"(It is an EMC ISLAND01 storage) and ...