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

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2answers
497 views

Traceroute doesn't reach gateway

i have problem with my opensuse 11.3 network. So, i've assigned ip 192.168.137.2 to it, and another computer (win7) with ip 192.168.137.1 On the opensuse, the gateway is the 192.168.137.1. and the ...
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1answer
160 views

Add IP addresses on CentOS 6

I have a 12 IPv4 addresses that I need to add to a CentOS 6.3 machine however those 12 IPs are spread out among 3 different subnets. I know how to add additional IPs when they are on the same subnet, ...
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1answer
334 views

4in6 tunneling software for Windows

I have a VM running Windows 2008 R2, and I need this VM to connect to a remote site using VPN. The VPN software does not support Windows 2008 R2 or any other 64 bit operating system, so I can't ...
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1answer
260 views

Setting IPv4 address and domaine restrictions in IIS7

I have a couple of sites that I want to only allow access to specific IPs. I have added these IP addresses to IIS7 via the IPv4 Address and Domain Restrictions functionality, as per the link below: ...
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1answer
418 views

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 ...
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1answer
116 views

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 @ ...
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1answer
40 views

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, ...
0
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1answer
635 views

/etc/init.d/iptables-persistent start returns fail but seems to work

I am trying to activate iptables-persistent on an Ubunutu server. Config files are located in /etc/iptables/rules.v4 /etc/iptables/rules.v6 I have installed the iptables-persistent package. ...
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1answer
231 views

Assigning two IPs to one NIC in CentOS

I have been following this method described here: http://linuxwave.blogspot.com/2010/01/setting-virtual-ip-in-centos.html To assign a virtual IP to one NIC. Basically I copied ifcfg-eth0 and makde ...
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1answer
266 views

what is giving me a backwards IP address?

This is the background: http://superuser.com/questions/400298/cause-of-intermittent-smtp-emailing-sending-problems In short Outlook (2007 IIRC) was receiving the wrong IP address for the SMTP server ...
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1answer
44 views

how to 2 ip virtual in public dan private with forward to different destination

Here my case, Server 1 public IP in 1 box (eth0) -> 203.x.x.55/28 and 57/28 gw 203.x.x.49 private IP (eth1) -> 10.10.8.1 Server 2 private IP in 1 box (eth0) -> 10.10.8.5/24 and 7/24 gw 10.10.8.1 ...
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0answers
279 views

Routing not working with OpenVPN

I'm trying to setup an OpenVPN server but I'm stuck with routing problem... This my network configuration: Client(172.17.17.6)<->Router+Firewall<->OVPN Srv(WAN:197.174.211.77)<->Subnet A ...
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0answers
7 views

Powershell - Sort-Objects, list of IP Adresses

I got a /20 network and I want to know all used IP Adresses and their attributes like the MAC, the name and the description plus all free addresses between the used ones so that I got a long list ...
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0answers
18 views

IPv4 header options handled different in Win7 and WinXP

If I send an ipv4 packet with (non standard) options to a WinXP host, it works as I expect it to do: The packet is handled correctly. If I send the same packet to a Win7 host, the packet is answered ...
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0answers
174 views

Netlink error while using IP queue

I seem to have an issue with IP queue. I have a linux machine that I am using to run some experiments. The linux machine is configured to be a router, having two NICs, connecting two other computers, ...
1
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0answers
374 views

Does TIME_WAIT affect dynamic ports?

I've read a bit about TIME_WAIT connections, and know they should be harmless to my server (connection closed, so no resource connected with this socket). Recently, my server reached the magic ...
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0answers
33 views

How to start with IPv6 subnetting on linux gateway

We are currently having perfectly working IPv4 network with a typical layout - internal network with all servers splitted to VLANs in 10.0.0.0/8 (each vlan is /24) and external network with public ip ...
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0answers
13 views

Assigning Outbound ipv6 Addresses to Users via Squid-Cache Proxy?

I know that I can assign ipv4 listening ports that route to outbound ipv6 addresses for connections to ipv6 sites using Squid-Cache but the problem is there's a limit on the amount of listening ports ...
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0answers
59 views

Squid Proxy: How to link inbound IPv4 ports to outbound IPv6 Addresses

I'm using Squid and I need to accept inbound connections on an ipv4 address using an ipv4 port that each user account link to an specific outbound ipv6 address. So for example I want to open port 4000 ...
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0answers
140 views

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 ...
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0answers
58 views

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 ...
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0answers
190 views

Repair RRAS and NAT on Windows Server 2008 R2

We have a Windows Server 2008 R2 server with RRAS installed and configure with VPN and NAT. NAT stopped working and when I checked, IPv4 is missing . I've tried re-installing RRAS but it just ...
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0answers
385 views

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 address: ...