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20 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: ...
0
votes
1answer
12 views

%Invalid interface type and number

I am trying to apply a scenario from the Cisco CCENT book where a 2811 Router uses VLANs. I have applied the network as is in the book inside my Packet Tracer. Here is the section in the book and ...
0
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2answers
58 views

Debian Jessie /etc/network/interfaces post-up route gateway won't persist reboot

I have a Debian Jessie box with 2 interfaces. I want eth1 to route public traffic on public static IP 1.2.3.4, and eth0 to route mgmt traffic on 192.168.0.55, so I edited /etc/network/interfaces to ...
0
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0answers
24 views

Problems with Switch DGS-3420-26SC

I have a new SWITCH DGS-3420-26SC. Look at situation: On the first SWITCH Dlink DGS-3100-24TG, i have three VLANS: VID 99,132,100 99 this is our SERVICE VLAN; 100 this is VLAN of the neighbours ...
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2answers
34 views

FreeBSD interface up/down monitoring

How to get informed about specific interface status in FreeBSD? ifconfig <ifname> | grep "status: active" works fine but I want to avoid polling and be informed as fast as possible about ...
0
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0answers
73 views

How to send answer packets to initial NIC in Windows 2008?

There are two hosts. Both has two NICs. [host1] -- lan -- [host2] | | internet internet host1 - Win Server 2008 host2 - Linux Debian How to route tcp connections to ...
0
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0answers
18 views

How to replay online traffic from one interface to another with delay

I 'm searching a way to replay traffic from one interface to a secondary interface. I want to all the traffic (not specific to a tcp port) incoming to one interface will be replayed from another ...
0
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2answers
95 views

How to add persistent route for 2 VPN connections when interface # varies?

I need to configure split tunnelling with persistent routes for 2 VPN connections on the same computer as the user needs to connect to 2 different corporate servers at the same time. I have a problem ...
0
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0answers
222 views

Add static route on Ubuntu 14.04 server

I have set up Ubuntu 14.04 server on a machine and configured /etc/network/interfaces with two gateways. The default one is em1 which is fine, but I need traffic to a specific IP address on the ...
0
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0answers
62 views

Assign VLAN to multiple ports in SonicWALL TZ300

I have a SonicWALL TZ300 with Cisco SG200-08 smart switches. My X1 interface is my WAN and my X0 interface is the default LAN. My X2 interface is 192.168.1.1 and is in a custom public zone (LAN2). I ...
1
vote
1answer
66 views

Configure bond using mode=4 (802.3ad)

I have a Debian 8 system with two NICs I want to bond. My managed switch is already configured to link aggregate the two ports I'm using. On the linux box, I have installed ifenslave. In ...
1
vote
1answer
38 views

VMware Guest machine NIC errors

I am running Linux CentOS 5.11 with 32bit Arch I have seen NIC generating many interface errors [root@centos5 ~]$ /sbin/ifconfig eth0 eth0 Link encap:Ethernet HWaddr 00:0C:29:97:C0:0E ...
2
votes
2answers
104 views

Debian Linux routing additional IP to LXC

I'm trying to route an additional IP of my server from Hetzner to a LXC instance (on Debian Jessie). I've found this guide ...
2
votes
0answers
99 views

Can't communicate between multiple interfaces on same subnet

I have multiple ethernet interfaces on one machine, all on the same subnet. Normally these are set up to run on separate VM's, and I understand the limitations imposed by Linux as described here, but ...
1
vote
1answer
40 views

Linux Interface configuration

May i have some question about interface configuration ? I want to use 4 ports gigabit bonding on centos6. Is linux limited speed below full ports( 4 * 1GB) by default or not? I cannot use speed more ...
0
votes
1answer
49 views

OpenVPN - connect server as client to itself

I have tried to setup a small openvpn network but I ran into one big problem. I have a server and a machine at home. So I created a openvpn server on my machine and a configured the client on the ...
1
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0answers
48 views

functioning of virtual interface on Linux [closed]

I am trying to understand the working of virtual network interfaces in Linux environment. Specifically, 1. I have created 2 virtual WiFi NICs in an Ubuntu 12.04 Machine with physical Atheros Wireless ...
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0answers
31 views

Expert iptables Nat - Virtual interface ip address issue

I've been looking information related to this problem several days, I had no luck finding a concrete explanation. Explanation about this issue: With this command I redirect one ip to another ip in ...
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2answers
112 views

What does the command “ifconfig <interface> 0.0.0.0” do? [closed]

The question is direct, what does the given command do, and what is it used for? ifconfig <interface-name> 0.0.0.0 I know that 0.0.0.0 means all IP addresses on my local machine. Also if I ...
4
votes
1answer
302 views

Debian - static ip, /etc/network/interfaces

I tried to set a static IP on my Debian 8.1 (in VirtualBox), so I edited the /etc/network/interface file : # The loopback network interface auto lo iface lo inet loopback auto eth0 iface eth0 inet ...
0
votes
1answer
72 views

Specific host file for interface with dnsmasq

I use a VPN on an interface, e.g tun0 (2.2.2.0/24), while the LAN network is on the interface eth0 (1.1.1.0/24). I use dnsmasq to route specific addresses to my LAN and these addresses have their ...
3
votes
1answer
2k views

Fedora 21: Firewalld (firewall-cmd) won't PERMANENTLY assign interfaces to zones?

I installed Fedora on this one machine which is EXCLUSIVELY a gateway / firewall system. Following installation, I ran 'yum upgrade', and so it should be up to the very latest Fedora 21 - I'm a ...
3
votes
3answers
69 views

Can't consistently ping both networks of multihomed host

I have a host which is multihomed, eth0 is on 172.31.254.0/24 and eth0.10 is on 172.31.253.0/24 . Obviously eth0.10 is a subinterface on vlan id 10. From this host I can succesfully ping hosts on ...
0
votes
1answer
35 views

Can I easily change Sonicwall's rules from one interface to another if I physically change interfaces?

In our Sonicwall, we want to unplug our cat5 cable from X0, and instead use a optical fiber into X16. But this would mean changing all our rules (we have many VLAN sub-interfaces and firewall rules). ...
0
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0answers
72 views

Set up a GRE tunnel over multiple communication channels

I am in a situation where I would like to be able to set up a GRE tunnel running seamlessly over GPRS or Wifi in linux 2.6, preferring of course Wifi whenever available. So on one host I have two ...
0
votes
1answer
41 views

reg query inside unknown keystring

Is there a way to reg query into an unknown keystring? What I mean by this is if I do reg query HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\ the entries will ...
1
vote
1answer
90 views

2 nics and 2 public ips

I have a server with 2 nics (interfaces) running ubuntu 14.10 I need to connect each nic to a different router (each being a gateway to different internet connections from different ISPs. I also ...
-3
votes
1answer
526 views

device vs interface vs connection under linux with nmcli [closed]

What are dependencies and relations between device, interface and connection in nmcli cmdline utility under linux? The below questions are asked in context of nmcli and networking in linux: Which ...
0
votes
1answer
85 views

Setup openvpn as interface device only

I just setup OpenVPN client using this guide on The Geek Stuff But now (somewhat as expected) all my traffic is routed through the VPN. I actually just want to set up the interface device. Does ...
0
votes
2answers
138 views

Is it possible to configure carp using /etc/network/interfaces?

Lots of tutorials out there show to set-up carp using ifconfig: https://www.netbsd.org/docs/guide/en/chap-carp.html I'm wondering if it's possible to do the same using /etc/network/interfaces? For ...
1
vote
2answers
290 views

How does Linux pick which network interface to use?

Let's say I have a machine with two network adapters on different subnets, eth0 (10.0.100.5) and eth1 (10.0.200.5). Assuming both subnets have routes to the internet (though their own NATs) and to the ...
0
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1answer
3k views

Adding static IPs on a p1p1 interface in ubuntu 14.04 [duplicate]

I'm wondering if anyone can give me a rundown for networking configurations in ubuntu when the interfaces are p1p1 etc. I have tried p1p1:0 (like eth0:0) for secondary IPs to no avail. If someone ...
0
votes
1answer
115 views

how to connect/bridge two interfaces on different processes

I have two processes A and B (simulating real hardware device), each with their own TAP interfaces. If I want to send an ethernet packet to A, I send it on interfaceA, and similarly if I want to send ...
0
votes
1answer
109 views

Can we add post commands with the salt network module?

I'd like to add post-up and post-down commands to my network interfaces. Can salt.states.network do that ? If not what would be the best way to add them using salt knowing that I can't simply add ...
-3
votes
1answer
480 views

ssh on eth0, everything else on eth1 [closed]

I wouldn't even consider myself an iptables novice user, so I was wondering if someone could please help me to do this: I want to be able to ssh into one of my servers using the eth0 network ...
7
votes
2answers
1k views

Packet captures: filtering on RX vs TX

I have a network problem where frames with a source MAC which matches with one of my host's source MACs are arriving at the host - an apparent duplicate MAC, or loop, or other L2 problem. I believe ...
-2
votes
1answer
394 views

Web Interface to sharing files on a server with automatic deletion after x days [closed]

I currently have access to an FTP server, with files uploaded onto them. I was interested in knowing how to: Automatically delete files on a specific folder on the FTP server which are x days old? ...
0
votes
1answer
225 views

Linux: Duplicate network interface to simulate link failures

I run Ubuntu. I need to add some latency and/or some network errors to see if my application can handle with network failure ( connecting & disconnecting ). I found "tc" tool which will be helpful ...
0
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2answers
330 views

Iptables unable to allow ssh through second interface

I am having an issue where as I am unable to get SSH outgoing connections to be preformed with my current firewall rules from my second interface (eth2). The machine I am trying to connect from has ...
0
votes
1answer
417 views

Routing tables in OS/X Mavericks - causing traceroute: sendto: Cannot allocate memory

OS/X does most of its routing based on the order of the interfaces in 'Network Preferences'. I need to separate traffic, so I've put the default route first, and then routed traffic to the second ...
4
votes
1answer
2k views

Ping not working from tap interface attached to bridge interface with ip on same subnet as that of bridge to outside

My requirement is to create a multiple tap interfaces, each with ip address on same subnet. I tried this by creating a bridge br0 (192.168.1.199) ...
6
votes
1answer
5k views

Make sshd listen to a specific interface

On my machine I'm using OpenVPN which use the tun0 interface. I want sshd to listen only on this interface. I know, I can specify the IP address to listen to in /etc/ssh/sshd_config with a ...
2
votes
0answers
251 views

Debian, IPv6 is not asssigned to interface

I have a Debian 7 Server with several networks and KVM VMs running configured: 2a01:4f8:191:439b::/64 144.72.132.208/29 The IPv6 Subnet is splitted into /96 Networks to assign each bridge a own ...
4
votes
1answer
15k views

How do I route all traffic from clients connected to the DD-WRT to its OpenVPN tunnel tun0?

I am setting a secondary (DD-WRT) router to act as a OpenVPN client so that all clients would get VPN access simply by connecting to the router. But seems clients traffic is always routed via the main ...
1
vote
1answer
182 views

heartbeat doesn't work on virtual interface

I try to use vertual interface as broadcast for heartbeat(bcast in ha.cf). When I try it I see this message in syslog: May 23 12:17:26 Ubuntu2 heartbeat: [1107]: ERROR: glib: Error setting socket ...
2
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2answers
3k views

XenServer 6.2 changing mtu

So I've looked around for a way to change the MTU of interfaces on XenServer 6.2, but can't find anything that works for me ... One method spoke about changing the ifcnfg-intX files in the ...
2
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2answers
245 views

Consistent Naming of 10gbps Interfaces on Dell Host

I have some Dell hosts in our environment. I would like to be able to provide consistent network interface naming across platforms. I know that biosdevname attempts to make the interfaces consistent ...
3
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2answers
22k views

CentOS 6.5 not bringing up network interface automatically after reboot [ifup eth0]

I am having this issue with many of my CentOS servers where after a reboot the network interface fails to come up automatically. This is a big problem for me since I need to drive to the datacenter ...
0
votes
1answer
90 views

Tshark/wireshark on an ephemeral interface

Our server hosts a VPN. Each connection to the VPN creates a new PPP interface (ppp0, ppp1, etc.) and the connections are ephemeral in the sense that the interface can go up or down intermittently. ...
0
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0answers
247 views

interfaces stopped working

I have a cisco machine with centos 6.5 installed on it and all of a sudden my network interfaces stopped working. When trying to restart the network service with /etc/init.d/network restart I got the ...