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How can I forward UDP Multicast between two interfaces on Linux?

I have 3 Hosts (A,B,C), all with two network interfaces with, lets say, following ips: - A: - eth0 :192.168.0.2 - eth1: 10.0.1.1 - B: - eth0: 192.168.0.3 - eth1: 10.0.2.1 - C: - eth0: ...
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0answers
32 views

Multiple IPv6 addresses added to interface, now IPv6 not working on my server [duplicate]

I got /64 IPv6 block from my server provider. When I add few IPv6 addresses (maybe 10 or 20) to network interface. Everything works fine about IPv6 network. When I'm added above 500+ IPv6 addresses ...
0
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2answers
4k views

NTPD seems to delete all network interfaces

We have a couple of virtual interfaces configured on eth0 on a CentOS, and every now and then, they went down seemingly out of the blue. Now after going through the log files, I found out that ...
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) ...
0
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0answers
21 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
2answers
97 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
votes
1answer
14 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
74 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
28 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 ...
1
vote
2answers
38 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
85 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 ...
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votes
3answers
1k views

identify physical network device by interface name in linux

I have multiple USB to ethernet devices which are plugged to the same pc. Is there a way to identify which one is mapped to which eth* network interface via usb port/etc ? I have tried looking in ...
4
votes
1answer
305 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
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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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0answers
255 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
votes
0answers
63 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 ...
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vote
4answers
1k views

Bring up a virtual interface without checking if it's up elsewhere

Is there a way to bring up a virtual interface without it first sending an arping to check if that IP address is already in use elsewhere? I'm working with a proprietary product that recommends ...
1
vote
1answer
73 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
111 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
100 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
50 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
vote
0answers
49 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 ...
2
votes
4answers
2k views

Is it possible to run two services on the same ports with different IP but on the same machine?

My question is simple. Is it possible to run TWO different game servers using exact same port but on different IP's using same network interface on the same server ? Does each IP adress have it's ...
0
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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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votes
2answers
117 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 ...
1
vote
1answer
183 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 ...
0
votes
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 ...
2
votes
3answers
4k views

Monitor loopback traffic (monitor MS TCP Loopback inteface traffic) with Microsoft Network Monitor 3.4 - possible?

I've downloaded NM 3.4 from microsoft.com and it appears that the software doesn't capture traffic on MS TCP Loopback interface. When I ping 127.0.0.1 address, NM shows no packets flowing. I've tried ...
6
votes
3answers
3k views

Linux email server for sending email from multiple IP addresses

I'm trying to setup an email server so it has the capability to send email from multiple IP addresses, so our marketing system can send email from multiple domains, while keeping the reverse DNS ...
0
votes
1answer
861 views

How to NAT virtual interfaces

I've created a virtual interface in Ubuntu with the following: sudo ifconfig eth0:0 192.168.1.99 netmask 255.255.255.0 up Now I need to be able to ping from the new virtual interface. ping -I ...
0
votes
1answer
74 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 ...
1
vote
1answer
820 views

Linux 2 network card routing depending on the interface used

My server has 2 network card installed and I manage to get it up and running. I can ping both interface but I can not ssh or access any service (ie web/ftp) if I connect using second interface. Both ...
4
votes
2answers
3k views

Samba domain trust errors on a specific interface

We have a windows domain that also has a RHEL member server in it. All the servers have a primary network connection to the LAN, but some servers also have private dedicated links to the RHEL server, ...
0
votes
2answers
2k views

what is the use of /etc/udev/rules.d/70-persistent-net.rules file in rhel?

what is the use of /etc/udev/rules.d/70-persistent-net.rules file in linux? is anyother way to change interface name in linux other than 70-persistent-net.rules? Thanks.
5
votes
2answers
2k views

No network loopback device after security update ubuntu 12.04

I've had Ubuntu 12.04 on a server for the last several months, with everything working fine. Last night I did an aptitude update && aptitude safe-upgrade to bring in all the latest security ...
2
votes
1answer
279 views

Is it possible plugging in a crossover cable to a 1Gb network adapter fried my adapter?

The host I am working with has two network adapters and is running Ubuntu Server 12.10. In an attempt to network two computers I used a cross-over cable as in the old 100Mbps days. After doing this I ...
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 ...
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 ...
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
votes
0answers
73 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 ...
1
vote
0answers
795 views

How to execute a script only once, immediately after ALL network interfaces are up in OpenSUSE?

I run Opensuse 12.2. I have 3 network interfaces, eth[012] The interfaces are configured in /etc/sysconfig/network/ifcfg-eth[012] I want to execute a script immediately after ALL three interfaces ...
0
votes
1answer
42 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 ...
0
votes
1answer
111 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 ...
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 ...
0
votes
2answers
1k views

Changing network interface names on RedHat

I have a DELL server running RedHat EL 6.3 with two 1G network interfaces, and two 10G network interfaces. Following this note, I have successfully renamed the two 1G network interfaces that used to ...
-3
votes
1answer
531 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 ...
1
vote
1answer
226 views

Inactive router on quagga

Im trying to connect 5 virtual machines using quagga but for some reason one of my virtual routers appears as inactive, when I use "show ip route" my router with IP "192.168.2.2" is inactive ...
0
votes
1answer
87 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 ...