the process by which data packets on communication networks are forwarded into the direction of their ultimate destination by routers.

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62 views

Firewall setup Huawei 4G with DMZ

Network topology: ISP1 | | Alternative ISP 4G | | | Huawei 4G with DMZ | | ...
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81 views

OpenVPN client routing on TomatoUSB router (gw IP instead of dev interface)

I connect to my openvpn server over Linux (Debian), iOS, Android - everything is ok. But over router (as client) with TomatoUSB firmware it's a problem with routing. I connect to my ISP over L2TP ...
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3answers
179 views

How can I achieve OpenVPN client routing without NAT on Linode

I've set up an OpenVPN network, and it is working properly in the sense that I can access the inner/LAN machines from the remote client. However, my problem is that all traffic from the remote ...
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58 views

Pfsense PPTP VPN Error 806

I was previously using another firewall software and simply by port forwarding port 1723 from the ADSL interface to a Windows Server attached to the LAN, we were able to VPN in. Since switching to ...
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1answer
56 views

Network packets flowing both ways but still can't communicate

I have a linux box with two NICS: eth0 192.168.11.14 eth1 192.168.12.14 My routing table is as follows: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref ...
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1answer
108 views

Destination host is unreachable in LAN

I have TP-LINK router which gets internet from fiber optic. Router is connected to Server(Microsoft Windows Server 2008R2). My server has 2 Ethernet Card, first one is getting internet(WAN) from ...
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3answers
104 views

Setting up gateway on different subnet than IP address

My provider has a (stupid) setup where the IP address for the gateway is on a totally different IP range than the assigned IP address. They insist on doing this for whatever reason. I'm trying to get ...
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31 views

With split routing configuration returning packets don't reach their sender

I am trying to configure a split routing setup, where all traffic goes out the default eth0 interface, while packets from a single client are routed via tun11 (OpenVPN interface). So far I've come up ...
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3answers
628 views

DNS servers already use anycast. Will adding more IPs enhance scalability?

RFC 1034 requires us to assign at least two IP addresses for DNS servers. However, redundancy can already be achieved by a single IP address if we use anycast addressing. BGP anycast seems to scale ...
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1answer
167 views

PFSense Different Gateway for different Hosts

I have a firewall software currently in use, however I am looking at replacing this with PfSense. I am looking to effectively replicate some of the settings on the current firewall we have in place. ...
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1answer
65 views

Dual LAN on one NIC and routing

I'm trying replace three Windows XP workstations with new ones running Windows 7 Pro, on a network which I did not setup and can't change. The old workstations had one NIC each with the following IPv4 ...
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3answers
152 views

Routing between two subnets using a Linux box with two NICs

I have a Linux box with two NICs, each connected to a different LAN: Network A: 192.168.1.0 255.255.255.0 Network B: 192.168.2.0 255.255.255.0 The routers are: 192.168.1.1 192.168.2.1 Linux NICs are ...
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143 views

[SOLVED ]Openvpn routing for lan to lan through tun

I am trying to setup an OpenVPN tun to connect two lan's The open vpn connection is up and working but there is a problem with my routing or nat or something. What I need is an example of what a ...
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1answer
94 views

Redirect all traffic sent to an unallocated alias IP within a VPN subnet, to a fixed IP within another VPN

I have a server hosting multiple bridged (i.e. tap) VPNs using openvpn, where each VPN has a different 10.8.X.0/24 subnet. I wish to redirect traffic sent to a specific, unallocated IP address (e.g. ...
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1answer
63 views

Block ip forwarding for specific remote ip address

I use ubuntu as gateway for several hosts. I need advise how to block ip forwarding for specific ip address or specific ip range? I tried to block ip via ufw deny rules, but it looks like ip ...
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3answers
56 views

Routing to multiple apps in a LAN with domains.

I have a handful of apps running on a couple of boxes in a LAN. All the apps use different ports. For simplicity let's say I have two apps on one server, apache serving at 8080 and tomcat at 9292. ...
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1answer
49 views

One router and one modem+router. Can I pass a static IP range from one to the other?

I had been running a Huawei HG612 connected to a DD-WRT router for internet services using PPPoE as authentication. Due to an office move, I need to have a DG834 modem+router which will be used for ...
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1answer
42 views

Riverbed Virtual In-Path on single subnet

I need to confirm whether or not the following Riverbed Steelhead configuration is valid and I don't currently have access to the Riverbed support portal. I have a client-side Virtual Steelhead ...
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1answer
39 views

Set up Ubuntu server to intercept traffic directed at another IP and send it to Apache? [closed]

I'm trying to reverse-engineer the protocol used by HP ePrint. For some reason the printer responds with an error when I override the DNS to point to my own local server, so I decided to create a ...
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1answer
41 views

Segregating web traffic between internet and LAN using Netfilter

I have a corporate "web appliance" which allows handheld devices to connect to it over wifi. I'm trying to figure out how to allow the appliance access to the internet (so it can download vendor ...
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1answer
287 views

Yum fails with [Errno 4] IOError: <urlopen error (111, 'Connection refused')> but TCP traceroute works

When I try to connect to yum repos using either yum info or yum install I get the error: [Errno 4] IOError: <urlopen error (111, 'Connection refused')> I first thought our Firewall may be to ...
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24 views

IP Route to forward SRC to other interface/gw

and thank you in advanced for your time and cooperation. I have a simple scenary. We have a VPS (venet0) with IP x.x.x.251 and currently, the main IP is part of eth1, but I need to force the traffic ...
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1answer
62 views

Cannot ping from client to internet via IPv6 tunnel

I'm facing an odd issue with my IPv6 setup. I've configured it as follows: /interface 6to4 add comment="SixXS 6to4 tunnel" local-address=zz.yy.xx.94 (my wan ip) mtu=1280 name=6to4-sixxs ...
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20 views

Detecting routing problems

I have machines on AWS and I am seeing inconsistency for particular AWS EIP subnets. I noticed packets for these subnets doesn't reach the destination AWS machine and gets lost somewhere on its way ...
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2answers
32 views

What do other nodes do with a switch's packets the first time the packets are sent out? [closed]

I'm a total newbie here and don't know much of anything about Routing and switching, Servers and the like.. so my questions might seem very newbie but please bare with me. When it comes to Switches ...
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37 views

OpenVPN Server & Two Gateways

I have a network setup as follows: Internet <---> Firewall <---> VPN (1) VPN <---> NAT (2) Internet <---> Firewall <---> NAT (3) (I don't have the reputation to post the picture :/) ...
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1answer
72 views

Easiest routing solution for a typical firewall with WiFi routers setup - WAN-2-hops-away network

Suppose a local network connected to the internet via a single firewall router. Devices that connect directly (= using only layer 2 devices) to that router are: hosts WiFi routers providing the ...
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23 views

How is the route scope parameter used?

I am confused about the route scope parameter in the output if /sbin/ip route. default via 10.32.10.1 dev wlan0 proto static 10.32.10.0/24 dev wlan0 proto kernel scope link src 10.32.10.154 ...
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1answer
293 views

ping works but ssh fails

machine1 IP: 172.30.11.119 machine2 IP: 172.30.11.120 machine3 IP: 172.30.11.121 machine4 IP: 172.30.11.122 Note: These machines are connected to LAN. I have configured the static ...
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1answer
53 views

OpenVPN Connecting Tunnels

I am struggling with a specific OpenVPN scenario for a few months now. Researching on Google, reading on Serverfault, browsing Blogs and other forums, messing with my config time and time again. I am ...
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39 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 ...
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1answer
224 views

Two NIC (eth0,eth1), two global IP on same subnet. Became unreachable to IP on eth1 after reboot

I configured a CentOS 6.5 virtual server and deployed it to a remote VMware vSphere environment. We needed two IP address, so I added a virtual NIC and assigned a second IP on eth1. I didn't ...
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1answer
77 views

Force all traffic from servers on the same bridge to pass through router interface

I have a bridge with all hosts from the 192.168.5.0/24 network connected to it.They all connect to this bridge via a secondary interface eth1. I have a router which connects this bridge to others on ...
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2answers
65 views

Firewall/Packet Sniffer - forward HTTP requests to a different address

I have a particularly "hacky" question/solution and looking for some honest feedback. In an enterprise system there are a number of requests that are destined for www.sometargeturl.com. These need ...
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0answers
40 views

Can I route traffic destined for a local interface out another interface?

I'm trying to set up a testbench for a transparent device (called TD from now on). The goal is to make sure it forwards and logs correctly. I need to use just 1 machine + the TD in the test bench. ...
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52 views

Multiple gateways with linux on same subnet using single NIC

I have the following configuration; Firewall 1 (site 1); x.x.x.x/26 subnet on external 10.0.0.0/8 on internal (internal IP 10.0.0.10) Firewall 2 (site 2); x.x.x.y/26 subnet on external 10.0.0.0/8 ...
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1answer
52 views

Port based routing on ubuntu

My situation: A ubuntu server is part of a LAN with 2 gateways. The one offers high speed with high latency. The other low speed with low latency. My server usually uses GW1 for all traffic (because ...
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2answers
116 views

Aws vpc default route table in CloudFormation

Am I missing something but is there no way to add a route via CloudFormation to the default route table that comes provisioned with a VPC?
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1answer
92 views

Windows server 2012 ignores static routing

BIG UPDATE: I was blind I see now that route 172.17.50.1 has netmask 255.255.255.255 and so it point to single host! But now I cannot understand how can I ping 172.17.50.10 because there is not route ...
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1answer
51 views

Forward all network packets from server A to server B (WAN) Ubuntu

I currently run a game server on a VPS and will shortly be moving VPS provider. To make the migration easier on the players I would like players to be able to use the original IP for a short while by ...
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2answers
735 views

Can't access local web server using remote ip from within LAN

Since I've change my ISP, the current router (ADB P-RG A4202N) won't let me access my web server from within my local network using my remote IP or no-ip host - it redirects me to the router config ...
0
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1answer
128 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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0answers
75 views

Routing through SonicWALL SSL-VPN and Cisco L3 Switch

In the image above, we use the SonicWALL NSA 3500 at our gateway and handle VPN with its SSL-VPN. Our Layer 3 Cisco switch is our core network switch and handles about a dozen VLANs. Most VLANs ...
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2answers
114 views

Spanning Tree Necessary With 2 Stacked Dell Managed Switches?

I have a PowerConnect 6248 and 6224P stacked with the 6248 acting as the managing switch. They're connected using the 48Gbps stacking module with 2 cables running between the switches. Do I need to ...
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65 views

Tracert of a spoofed IP results in Infinite Loop

Our firewall picked up a spoofed IP address that caught my attention. When I did a tracert to the spoofed IP address I get what I think is an odd response. Tracing route to 192.168.1.7 1 1 ms ...
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56 views

Is it possible two have two static routes that are each going to a different remote site from the host site and have back up routes too?

Is it possible to use static routes to communicate point to point where the host talks to two different networks simultaneously? The remote sites do not talk to each other, just host to remote and ...
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30 views

Route multiple domains to one server keeping original domain name

I am trying to get some idea of if the following is possible so I’m reaching out to you guys to see if you have any ideas. I’m not super experienced in this area so bear with me as I try to explain. ...
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55 views

Unable to monitor Cisco route tables with SolarWinds

I recently switched from scanning a linux-router based network hosted on CORE emulation software, to scanning Cisco IOS routers hosted on a GNS3 emulation with SolarWinds. Everything seems the same, ...
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1answer
81 views

Determine cause of connection refused on surveillance video unit

We have 3 similar surveillance video units. Each has a server that should be available on ports 80 and 443. One unit has suddenly become unavailable on port 80, and I'm working to determine what could ...
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99 views

Proper way of setting gateway outside of subnet on FreeBSD?

I have a VPS running FreeBSD 10 and it is located in OVH's BHS datacenter. The gateway for my VPS is not in the same subnet as my IP address and when I went to set the gateway the usually way, it ...