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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Is there a way to allow all external ip connections (i.e ipv6 as well as ipv4) in FreeRadius?

I need to accept all incoming connections to the FreeRadius server be it ipv6 or ipv4. I know that we can allow all ipv4 clients with: client 0.0.0.0/0 { secret = abcde shortname = xxxx } How ...
0
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2answers
55 views

Cannot bind to port > 1007?

I want to bind a server to port 1023. If I specify any free port > 1007, I have a "address already in use" error, but it works for ports <= 1007. Working as root on Debian 7.8... Any idea?? ...
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2answers
1k 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 ...
2
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1answer
362 views

Routing not working with OpenVPN

I'm trying to setup an OpenVPN server on Debian 6.0.5 (installed via apt) but I'm stuck with routing problem. This my network configuration: Client <-> Router+Firewall <-> OVPN Server ...
1
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1answer
199 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
454 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 ...
1
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1answer
359 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
37 views

Two subnets, two DHCP servers. How to stop both DHCP servers from responding to requests from both networks?

I have an environment with two subnets 192.168.1.x/24 and 192.168.2.x/24 Each subnet/network has a Cisco RV082 router as the gateway and a domain controller in each environment that also has a DHCP ...
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1answer
44 views

How to force Centos to use ipv6 interface only?

My Centos server has two virtual (Openvz) interfaces. One from these interfaces has ipv4 address configured, while the other one has the ipv6 one. In short this server is used for browsing / proxy. ...
0
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1answer
56 views

Can't discover a IPv4 link-local address when having an static IP configured

I have link-local addresses working out-of-the-box when coupled with DHCP, since when there's no DHCP, the device doesn't get an IP, only a link-local one. Still, I need to have link-local addresses ...
0
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1answer
32 views

No “duplicate host” warning if different netmask (same gateway)

I experienced the following "strange" behaviour on a virtual machine network setup (bridged): host 1 hostname: server_one ip: 192.168.1.2 netmask: 255.255.255.0 gateway: 192....
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1answer
62 views

Change Gateway doesn't work on Windows 7

This PC was configured with 192.168.6.1. But I tried to change it to 192.168.6.51. Although route print showed the default gateway is 192.168.6.51, but the packets next hop is 192.168.6.1. IPv4 Route ...
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1answer
95 views

NetBios issues with multiple adapters, may not be turning on

I'm working in a Windows 2008 server. I'm getting conflicting messages as to weather or not netbios is enabled. The problem is that my AD users can't "discover" the server. I think that netbios is to ...
0
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1answer
231 views

netsh command to add interface

I am working with Windows 2012 R2 Core and I having problems with setting up my NICs after they got reset. When I run "netsh int show int" it shows bother Interfaces as Enabled and Connected. ...
0
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1answer
103 views

Windows translate external IPv6 to localhost IPv4

I have a machine running Windows server 2012, whose external IPv6 address is "2a01:4f8:190:7449::4". Let's assume it has no external IPv4 address, so the v6 address is the only way of accessing it ...
0
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1answer
281 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 ...
0
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1answer
875 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 -...
0
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1answer
240 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
58 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
302 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 ...
0
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1answer
384 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
77 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
74 views

ping between ipv6 and ipv4 networks

I have 2 networks (one ipv4 and one ipv6) , I used ospf as routing protocol for both networks. I activate bgp between this 2 networks(R6 and R1) and now R6 can ping the full ipv6 network and R1 can ...
2
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0answers
95 views

How to disable IPv4 use on OSX (Or disable Happy Eyeballs)

I have a OSX El Capitain (10.11.2) host that has only IPv6 connectivity. The network uses NAT64 and DNS64 to provide access to legacy IPv4 hosts on the internet. The problem is that when looking up a ...
2
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0answers
57 views

cannot bind a port altough LISTEN

I'm new to this problem I'm using Ubuntu 12.04 LTS via VMware My problem is to bind port 6703 i tried alot of commands to check if this port or open or not Error Message is Failed to bind to: 0....
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0answers
56 views

Drop fragmented packets in nftables

Using iptables is it possible to block fragmented packets with this rule: iptables -A INPUT -f -j DROP But there isn't a equivalent in nftables. There is any way to do it?
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0answers
199 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, ...
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0answers
420 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 ...
0
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0answers
16 views

Can't connect to virsh managed QEMU-KVM via network interface

trying to connect via SSH to VM on Debian 8.4 Host. Seems the virtual ethernet adapter don't get an IP4 by DHCP. Can smb. point me in the right direction :( Some cfg. details... #ifconfig eth0 ...
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0answers
67 views

IPv4/IPv6 dualstack setup in Debian/Ubuntu via preseed

I use preseed to provision my Ubuntu 16.04 installation. It has the following options to set up IPv4 or IPv6 address # Static network configuration. # # IPv4 example #d-i netcfg/get_ipaddress string ...
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0answers
68 views

IPv4 over IPv6 IPsec tunnel

I've got two Cisco 2811 routers, both with a global static IPv6 adress, and an IPsec tunnel between them (using VTIs). Is it possible to send IPv4 traffic over this tunnel? The relevant parts of the ...
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0answers
70 views

HAProxy configuration problems (with source directive)

I have HAProxy setup to listen on a public IPv4 address (1.2.3.4), it is supposed to proxy all requests to my b_http backend. The back-end has a source line that makes it connect to the server/site ...
0
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0answers
23 views

Assigning 2 IPv4 blocks to one interface

I have been assigned these 2 blocks by my provider Block: x.x.x.184/29 Usable range: x.x.x.186 - x.x.x.190 Gateway: x.x.x.185 Subnet: 255.255.255.248 And Block: x.x.x.192/29 Usable range: x.x.x....
0
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0answers
44 views

Debian Host replies with ICMP Port Unreachable after Router Advertisement (ISATAP)

I'm trying to configure a Debian Wheezy host to get an IPv6 address via ISATAP (using isatapd). This machine has two outgoing interfaces: eth0 and eth0.20 (virtual interface using VLAN 20): 1: lo: &...
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0answers
86 views

Routing subnets per interface on a dual nic windows server

The server I'm working on has 2 NICs. C:\Windows\system32>route print =========================================================================== Interface List 20...00 50 56 ad 02 3b ......Intel(...
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0answers
24 views

Why do I have to specify the subnet broadcast address?

When configuring the management IP address of managed Cisco switches, I have to specify the broadcast address of the management network next to their address AND their netmask. Of course this is ...
0
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0answers
120 views

What causes the Linux neighbour table confirmation counter to be reset

Given three linux hosts on the same broadcast domain, the sender constantly pings an IP bound to receiver1. When moving the IP address from receiver1 to receiver2 it takes a quite long time for the ...
0
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0answers
521 views

How do I force IPV4 with PCS? (Pacemaker/Corosync)

I'm setting up a Pacemaker/Corosync cluster with a DRBD mount for a highly available Webapp in a secure environment. This is running on CentOS 7. The cluster is working. However to get this system ...
0
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0answers
127 views

How to set up a Linux gateway for multiple WAN networks?

I have a network with the following IPv4 and IPv6 addresses: eth0 Link encap:Ethernet Hardware Adresse 30:85:a9:42:3e:60 inet Adresse:109.2xx.239.145 Bcast:109.2xx.239.255 Maske:255.255....
0
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0answers
698 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 ...
0
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0answers
220 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 ...
0
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0answers
593 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: DEVICE=...