Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [ipv4]

Refers to the 4th revision of the Internet Protocol, where addresses are usually displayed in the form of dotted decimals between 0-255. Ex: 169.254.0.1

The IP address of a device is its unique identifier on a network which allows communication with that device.

Given the fact that only 2^32 IPs are available, number which is already depleted, its successor (IPv6) has officially taken over on 6 June 2012.

455 questions
0
votes
3 answers

How to forward port traffic to public IP in Win2K8

I need to forward traffic coming in to a server from a public IP over a specific port (port 7575) to another public IP address on (preferably) the same port. I am using Windows Server 2008 R2 on the "old" server. Example: [rem device] 1.2.3.4:7575…
jwatts1980
  • 131
  • 1
  • 11
0
votes
1 answer

IPv4 Nating and IPv6 Bridging

We have only 5 usable static IPv4 IPs and many IPv6 static IPs. We want Multiple nodes/pc to be connected with Internet using nating/router because we have limited number of IPs. We would still want few nodes with static public IPv4 IPs. All nodes…
Jai
  • 141
  • 1
  • 3
  • 14
0
votes
0 answers

Windows computer with static IP and 169.254 APIPA address

I have a Windows7 Pro computer being used as a server to control our IP cameras. Recently, it refuses to connect to any of the cameras, even though the cameras themselves are working. I can access the cameras through their own addresses on a web…
Erik
  • 21
  • 1
  • 3
0
votes
0 answers

Ubuntu refuses to route packets for public subnet through linknet

I've run into the novel concept of routing through a linknet from my new ISP, and am currently trying to get a /28 routed properly on my Ubuntu 13.10 server. However, this is proving futile. This is the routing table for the host: Destination …
Kenneth Aalberg
  • 1
  • 1
0
votes
1 answer

Ubuntu 12.04 services using ipv6

I currently manage two servers on Linode. The first "server-a" is running 12.04, the second "server-b" is a fresh install of 14.04. A while ago I had some trouble with spf records on server-a and came to the realization that I needed to explicitly…
But those new buttons though..
  • 317
  • 5
  • 23
0
votes
3 answers

Dual-Stack Lite and FTP connection via IPv4 - How?

my original question: FTP client/server failing on switching to PASV mode Based on that, I would like to know if/how I can open a FTP connection from a computer that is inside a ISP's network that uses Dual-Stack Lite to a FTP server that is only…
Steffen Winkler
  • 259
  • 1
  • 4
  • 15
0
votes
1 answer

can I use DNS with private NAT addresses?

I want to build a service that dynamically creates VMs and assigns each VM a public DNS record which could be a full domain or a subdomain. Assume the VMS all live on a single host. The VMs will have a mix of TCP or UDP exposed services running on…
kevzettler
  • 167
  • 1
  • 3
  • 11
0
votes
1 answer

Route IP to OpenVPN client

I have to external IPv4-IPs at my VPS. I want to route one to a VPN client, OpenVPN (tun). Only one VPN-Client should use the VPN, and I want to route all traffic to my second external IP to this VPN - to get a static address for some services like…
wb7
  • 134
  • 6
0
votes
1 answer

Attack from strange IP address, how to block?

Looking through the mail logs I've noticed a lot of these: Apr 7 11:33:25 s123456 pop3d: IMAP connect from @ [::ffff:192.96.206.9]checkmailpasswd: FAILED: web14p3 - short names not allowed from @ [::ffff:192.96.206.9]ERR: LOGIN FAILED,…
ScottMcGready
  • 119
  • 7
0
votes
1 answer

iptables NAT forward range

I have two network interfaces, eth0 and eth1. eth0 has a public ip, eth1 has 172.16.0.254/24. I'd like to do the following mapping: 172.16.0.1:22 -> eth0's public ip:2001 172.16.0.2:22 -> eth0's public ip:2002 172.16.0.3:22 -> eth0's public ip:2003…
rralf
  • 121
  • 3
0
votes
1 answer

change timeout for dropped ip traffic

I am behind a corporate firewall, which simply drops (swallows) all ip-traffic to unknown ip-addresses. It takes a lot of time for Linux (Ubuntu 13.10) to abort my erroneous connection-attempts, causing quite a few applications to hang. Which…
mirk
  • 113
  • 1
  • 5
0
votes
1 answer

no internet connection when in private network

I have an ubuntu server with a public IP, which I can reach with ssh from my local machine. However, when i put this server in a private network, I can no longer reach it with ssh from my local machine. Also, this server no longer has internet…
vefthym
  • 121
  • 7
0
votes
0 answers

Configuring DHCP IPv4 and static IPv6 on the same interface

I need to configure on a network interface (eth1) with static IPv6 and get an IPv4 address from DHCP on a CentOS 6 machine? Using the configuration below I only get a dynamic IPv4…
Chedy2149
  • 223
  • 4
  • 14
0
votes
2 answers

IP Routing with 2 Subnets

We currently have a Cisco ASA on a range with only two usable IP addresses. The Cisco has 217.67.255.31 and the BT NTE box (for the leased line) has 217.67.255.32. (on /32) Now we want to split this line across two firewalls, so the existing ASA and…
PnP
  • 1,684
  • 8
  • 39
  • 65
0
votes
2 answers

Why does ipv6 not specify a protocol version?

I am relatively new to dealing with network packets, but as I look into the ipv6 header formats, I do not see a place where the ipv6 headers define what protocol is used in the data section -- but the ipv4 protocol does. Am I missing where ipv6…
Alexander Bird
  • 431
  • 2
  • 7
  • 14
1 2 3
…
30 31