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27 views

smtp-request behind iptables-router not working

I set up a router with ip-forwarding on Ubuntu 16.04 Server edition. I enabled ip-forwarding in /etc/sysctl.conf . I have set net.ipv4.ip_forward=1 and executed sysctl -p /etc/sysctl.conf I used ...
1
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1answer
16 views

UFW 0.35 - Redirect incoming port 2121 to port 21 on VM (other interface)

I'm posting here because I've got a server, and I want to redirect the port 2121 of my main interface (eth0) to the port 21 of my secondary interface (virbr0). This is my configuration : Physical ...
1
vote
1answer
32 views

HTTPS between two port forwarded domains in Azure, problematic?

I'm not too comfortable with these things, but quite possibly what I'm asking is trivial. I have a site hosted at foo.azurewebsites.net And also an API at bar.azurewebsites.net (WEB API as an API ...
1
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0answers
23 views

How to redirect a URL from hostapd without internet access?

I have configured my server with iptables rules in order to forward all traffic to a specific domain. Those are NAT rules and the redirection works fine as long as I have internet access. But when ...
-1
votes
1answer
27 views

Send local traffic from host A:3306 to host B:3306

I'm having trouble making sense of all the iptable examples out there. I simple want all requests from my machine to host A on port 3306 to actually go to host B on port 3306. How can I do this?
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0answers
35 views

OpenVPN connect to OpenVPN client network

OpenVPN Server Ubuntu 14.04 In Digital Ocean (Public and Private interface) OpenVPN client Ubuntu 14.04 I can't SSH from Server to client via VPN connection. Ping works fine. Tunnel is up. Followed ...
0
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0answers
26 views

Naked Domain Forwarding Broken on Godaddy with Period Slash

Is Godaddy naked domain forwarding broken when you have a ./ in the URL? I use GoDaddy for DNS and have naked domain forwarding setup. I have my A record @ set to GoDaddy servers, and use their ...
0
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0answers
49 views

NATted host cannot talk to itself unless virbr0 is in promiscuous mode

We have the following situation: A hypervisor using KVM-Qemu/libvirt with a single VM. The VM has the internal IP 192.168.122.151 on the default network pool using virbr0 on the hypervisor. We've ...
0
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3answers
132 views

Forward packet to another host in the same network

I have 3 hosts in the same subnet, each host has one network interface: A: 192.168.0.1/24 B: 192.168.0.2/24 C: 192.168.0.3/24 On host A, I just ping host B once. This should generate a packet (A->B)...
2
votes
9answers
417 views

IP forwarding on Linux - anything important to make sure to do or know?

In moving a website with a dedicated IP from one server to another, to minimize downtime due to DNS propagation delays, there's the approach of using IP forwarding so that all traffic to the original ...
0
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1answer
92 views

How to prevent linux from dropping incoming packets that have a wrong mac address (promiscuous doesn't work)

I configured three machines in a static proxy_arp like manner: ----------------------+ +-----------------------------------------------+ +---------------------- Machine A | | ...
3
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0answers
51 views

how to configuring secondary IP subnet that is directly routed to WMware ESXI main IP

I have a ESXI 5.1 which comes with a /29 Block IP (EX. 70.60.50.0/29) and the ESXi management address is frist usable addres 70.60.50.2, also i have a secondary /27 IP block (10.20.30.0/27) which is ...
0
votes
0answers
18 views

Forward request with Apache Server

My current scenario is as follow: I have an Apache server that is being run on Windows Server 2008 R2 in the DMZ that listens on port 80 for incoming connections, IP is 155.15.22.90. I then have an ...
1
vote
1answer
77 views

How can I add a static route via a remote server?

I have a remote (i.e., 3 hops away) hosted Linux VM, with some LXCs. Those LXCs have internal IPs 10.0.3.* The VM has IP forwarding enabled. From my Windows machine, I would like to ping the inner ...
0
votes
1answer
235 views

redirect IP on osx

On my Mac OS X (10.6.8) I'd like to make all requests for 111.111.111.111 go to 222.222.222.222 for all ports. To test this, I have a webserver at 222.222.222.222:80 which will respond with a page for ...
3
votes
2answers
560 views

Map IP to another IP

Assume the following scenario, if I have a local machine (A) the requests another machine (B) using B's internal IP without regard the ports. But A and B are not on the same network, however, B has a ...
0
votes
1answer
118 views

route output traffic from specific NAT'ed VM via ip alias

In a dedicated server with several containers behind NAT, I'm trying to route the output / outbound traffic from one of the containers through a specific virtual interface attached to the main ...
0
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1answer
73 views

IP Forwarding Issue

This is my first post, so thanks in advance for y'all's help. I'll try to keep the background succinct and relevant. I am running a server on centOS 4.6 for network client testing. I have the local ...
0
votes
1answer
60 views

Master and slave devices talking to each other through another device with two interfaces. All in the same network

I have three devices, one is a master which will talk with the slave and Device3 but it is only physically connected to the Device3. The slave will speak only with the master(also through the Device3)....
1
vote
1answer
205 views

iptables forward ip to another ip

I've configured multiple IP Addresses on my Ubuntu ssh server. Now the server can be accessed by using any IP Address, from 192.168.0.51 to 192.168.0.99. Depending on which IP Address someone uses to ...
0
votes
1answer
402 views

forwarding packet from one interface to another interface

I have an embeded system with 2 interfaces e0 and m0, whose ips are 10.0.0.20 and 192.168.0.20, respectively. Incoming packets into e0 have an ip of 10.0.0.10 and should be forwarded to m0 interface ...
0
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1answer
186 views

Enable IP forwarding inside an OpenVZ container but disable it on host

Is it possible to enable IP forwarding inside an OpenVZ container but keep it disabled in host system? I understand that OpenVZ containers and host share kernels, but I can use sysctl to set ...
0
votes
0answers
77 views

Redirect traffic through a computer to another connected to the same switch

I am trying to setup a single sender, single bottleneck and single receiver network. Network Image The router in the image is a computer that has ip_forwarding enabled. PC1 has the default gateway ...
0
votes
1answer
421 views

Forwarding IP address using pf

I'm trying to forward an external IP address to another external IP address with pf. The equivalent iptables command would be iptables -t nat -A OUTPUT -d [ipaddress1] -j DNAT --to-destination [...
3
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0answers
2k views

OSX Yosemite IP Forwarding not working

I coudn't manage to set up basic ip forwarding on OSX Yosemite 10.10.1 Mac-Mini. I use the exact same configuration on a OSX Mavericks 10.9.5 Mac-Mini, and it's working perfectly ? I set the sudo ...
1
vote
1answer
53 views

Double IP forwarding not working

I have the following 2 debian servers in my scenario: The first one is my main openvpn server, it has 2 NICS active eth0 (172.25.156.146) and eth3 (172.26.16.1) - The second server has also 2 NICS ...
0
votes
0answers
208 views

Iptables - centos 5.8 - how to forward ports to internal lan

I'm trying to map port 8080 to another machine running a web server. ppp0 = ADSL internet connection eth0 = ethernet card of linux machine (ip address: 192.168.0.2) 192.168.0.105 = other machine ...
1
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1answer
1k views

openvpn windows routes ip forwarding enabled but not working

I have setup an openvpn network, I have in my client windows two interfaces, one public with IP 1.2.3.4 and the openvpn interface, with ip 192.168.244.10 I am able to ping from windows to the server'...
2
votes
1answer
11k views

Getting the client IP when passing through a reverse proxy

In my VPS I am hosting several websites. everyone living in its own Linux Container. For instance Site #1 -> 10.0.3.111 Site #2 -> 10.0.3.112 Site #3 -> 10.0.3.113 To know where to ...
0
votes
1answer
81 views

SSHD to retrieve forwarded client IP

This is my use case: I have a bunch of hosts behind load-balancers and clients SSH through the load-balancer. The LB internally creates a new connection so the connection with the end-host has the LB`...
1
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0answers
151 views

Openstack instances, routing, packets not delivered for SPECIFIC services

I am taking over management of an existing openstack system at work and I have only a little prior experience with openstack. I have about 8 instances running and all of them appear to function ...
4
votes
1answer
2k views

Bind outgoing SOCKS-server traffic to a specific IP

At the office we get access to the web via a SOCKS server which is started with the command: ssh localhost -f -N -D *:8888. This server has 2 IPs (but only one network card): eth0 xx.yy.zz.1 eth0:1 ...
0
votes
1answer
520 views

forward snmptraps with snmptrapd to second host

I have a setup with snmptrapd listening on udp:162 to receive snmp traps. They are then processed on this host with snmptt. I am now in the need that I need to forward those traps additionally to ...
0
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0answers
648 views

OpenVPN on Ubuntu: IP Forwarding not working

I have successfully set up a VPN connection between a Windows 8 client and my Ubuntu server running OpenVPN. However, I just cannot get IP forwarding to work. I have adjusted all settings as desribed ...
3
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3answers
5k views

Redirect IP Address to Domain Name

I am attempting to redirect the IP address of my domain to the domain name and am running into trouble. The IP address does not redirect to the domain name listed in the redirect statement below. ...
0
votes
1answer
223 views

IP routing Solaris 9 access the internet from local network

I am trying to configure the NICS on the Solaris Sparc server. My problem lies in getting out to the "Internet" from the local network. I have requested the NIC to receive a DHCP server address #...
-1
votes
2answers
56 views

Is it possible to point multiple domains to multiple static IP's on a single system? [closed]

I'm currently running the latest version of Ubuntu Server. I currently am pointing my subdomain to my static IP address. I have 5 static IP's and I'm wondering how I could use all static IP's at once ...
0
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2answers
184 views

do i need IPTABLES to enable IP FORWARDING?

To simplify, let's say I got a network with 3 servers (all runnning centos 6.4) in a row: Internet---FW---LN---PN FW: firewall LN: login node PN: processing node i can ping from the FW to the ...
-1
votes
2answers
780 views

Use Domain in iptables PREROUTING

I have a www.example.com with X.X.Y.Y ip i want to forward traffic from port 80 to the domain(www.example.com), I used the following iptable: iptables -t nat -A PREROUTING -p tcp --dport 80 -j DNAT --...
0
votes
1answer
40 views

routing behaviour (PAT/NAT)

|(eth0: 84.23.13.43) +--------------+ | | | NAT router | | | ...
1
vote
1answer
1k views

It is okay to set MASQUERADE at 2 network interfaces in a Linux server?

There is a Linux server with 3 network interfaces, eth0, eth1, eth2. IP forwarding has been turn on in this server. eth0 is connected to 10.0.1.0/24. Its IP is 10.0.1.1. eth1 is connected to 172.16....
2
votes
2answers
4k views

Does IP forwarding on Linux act as a reverse proxy?

I have looked around and have seen many IP forwarding solutions that forward requests from an IP on one server to another IP on another server. (Basically, the forwarding of requests going to 123.45....
4
votes
2answers
15k views

How do I forward/NAT all traffic to one interface/IP to a remote IP?

I have one "server A" that has multiple IPs attached to it, like so: eth0:0 1.1.1.1 eth0:1 1.1.1.2 eth0:2 1.1.1.3 I have another "server B" that also has multiple IPs attached to it, like so: eth0:...
-1
votes
1answer
506 views

Linux server not routing my packets

I have a linux server (Ubuntu 12) with 2 NIC's. eth0 is connected WAN (inet 10.0.2.15 mask 255.255.255.0) eth1 is connected LAN (inet 192.168.0.1 mask 255.255.255.0) I want my windows machine to ...
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2answers
2k views

how to route external IP to internal without MASQUERADE

Ok, i'm still working on creating a dmz'd http server So now I have an ethernet tunnel using ssh -w 0:0 and I have interfaces on each end which can talk to each other: previous question So now I'...
0
votes
1answer
83 views

IPTABLES Forwarding issue

Ok, so I am terrible with iptables so I need some help. Here is what I am trying to do. I have a lan box on vlan 4 (172.16.9.65) I have another box on vlan 9 (10.1.0.1) My gateway for my 172.16.9.65 ...
6
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1answer
5k views

connect Open vSwitch switch to real network : iptables masquerade

I'm using Open vSwitch to create a switched network between virtualBox guest machines, and i want that the host OS (Ubuntu 12.04) join this network and to configure it as the gateway of this virtual ...
0
votes
4answers
720 views

ssh to local network behind a public IP (TCP forwarding)

I want to connect (using ssh) two remote computers in a local network using a unique public IP X.X.X.X. | HOST_A---------| 172.1.1.2 | _____________ |------...
0
votes
1answer
255 views

IP Forwarding and Routing in Windows 2008

I have Hyper-V running on a windows 2008. I got a new ip stack from the data center to be set on my virtual machines. But I have difficulties to set these IPs on my VMs because they are on different ...
0
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1answer
7k views

Linux bridge (brctl) dosnt forward IP packet when router is one of the bridge endpoints

I have setup a brctl bridge on Ubuntu with the following deployment: Cisco router -> Linux bridge -> client computer The bridge forward the following packets types: ARP,STP, but doesn't ...