0
votes
2answers
55 views

Is there a way to find which IP I am connected to?

Let's say my eth0 interface has multiple IP addresses and I can connect with SSH to any of these. Is there a way to find out which of those I am connected to? (The background is that certain ...
-1
votes
0answers
22 views

Sonicwall + BT Infinity VDSL: how to use routed static public IP addresses [duplicate]

I have a UK BT Infinity VDSL2 connection. The ISP provide a modem, I dial a PPPOE connection over that modem from the sonicwall. The sonicwall receives a dynamic public IP address, and then my ...
-1
votes
2answers
31 views

Finding IP Of Remote Host Machine By IP Of Guest Machine

I am trying to find a way to figure out on which of the servers the virtual machine actually is residing. I know the ip of the virtual machine. It is in a bridged mode on the local network inside one ...
0
votes
2answers
45 views

sonicwall-multiple IP's for same interface

I am new to sonicwall.Is there any way to add multiple ip's to a sonicwall interface ?. In my lab there are two local networks connected to same switch (networks are overlapped). I need to communicate ...
10
votes
1answer
214 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
2answers
58 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
43 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 ...
0
votes
1answer
45 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
2answers
129 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 ...
0
votes
0answers
73 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
47 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
2answers
71 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
vote
1answer
85 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
0answers
37 views

KVM Networking guest issue due a provider networking limit

I have a KVM setup on Centos 6.4 64 Bits. My server provider assign us a Main IP to the Host with a gateway and netmask. Also our provider assign us additionals IP ( not in the same block as the Main ...
-3
votes
1answer
85 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 ...
1
vote
1answer
88 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
829 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
41 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
54 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
210 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
159 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
159 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
2k 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
128 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
106 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 ...
0
votes
0answers
26 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
45 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
49 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
400 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
103 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
88 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
75 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
116 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
84 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
80 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
341 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
49 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
vote
1answer
99 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
216 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
235 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
66 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
135 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
116 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
36 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
52 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
401 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
90 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
883 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
40 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 ...