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

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1answer
4k views

Routing between two routers with static routes

I have a Draytek 3200 router and a pfsense rackmount router that I am trying to get to route to each other. I have a subnet on each router and a subnet for the link between, as shown here: As it ...
4
votes
1answer
245 views

Multi homed firewall with ipnat

i am trying (without success) to configure a ipnat/ipf box under FreeBSD 8.2, here is the scenario: outside inside +----+ ADSL ...
3
votes
1answer
286 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 ...
3
votes
1answer
238 views

Packets not entering FORWARD chain

first of all, this is not an every-day routing issue. The setup is fairly complex, so let me state it before. I got a router with, lets keep it simple, 3 interfaces. eth0, eth1, eth2. eth2 is used ...
3
votes
1answer
2k views

Windows Server 2008 R2 RAS VPN: access server on internal interface ip

short question: I'm usually a linux admin but need to setup a Win2k8 R2 server for a student project. The server is running as VM on a root server and has a public internet IP assigned. Additionally I ...
2
votes
1answer
77 views

How to find which routing protocol a router is using. And if found how to test it

I was recently asked a networking question in an interview which I did answer but the interviewer was not pleased. The question was : "Given an actively running router, how would you know what ...
2
votes
1answer
92 views

Two openvpn servers on the same machine, route traffic between the two subnets

I have two openvpn servers ( one on tcp, one on udp) running on the same machine - an OPENVZ vps. The first network A uses 10.10.0.0/24 and it is designed as an intranet. The second network B uses ...
2
votes
1answer
442 views

How access remote network with OpenVPN?

I am currently trying to configure OpenVPN to access our company network remotely. I was able to establish a connection and ping the server at the configured address (10.8.0.1), but I was not able to ...
2
votes
1answer
4k 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 ...
2
votes
1answer
2k views

Strongswan VPN Established but no Packets Routed

I'm setting up a VPN using strongSwan between a Linux instance on an Amazon EC2 instance and a remote network via its Cisco concentrator. I need to route packets from the Linux instance itself a ...
2
votes
1answer
2k views

Fortigate VPN Routing issue

I have 200B Fortigate unit with 2 internet WAN connections. I also have a remote site which I'm connected to via IPSEC VPN through WAN1. This site has only one GW IP address. I'd also like to setup a ...
2
votes
1answer
383 views

route http and ssh traffic normally, everything else via vpn tunnel

I've read quite a bit and am close, I feel, and I'm pulling my hair out ... please help! I have an OpenVPN cliend whose server sets local routes and also changes the default gw (I know I can prevent ...
2
votes
1answer
268 views

Linux bridge static IP using only one NIC

It seems like I have a generic problem, but can't find any solution - every solution that I found so far on internets doesn't work for me. Let me first try to explain what I am trying to do - I have a ...
2
votes
1answer
419 views

Redirect SSH traffic through GRE tunnel

I'm trying to redirect all local connections with destination matchs port 22 to specified tunnel using iptables MARK, but, something is going wrong. 1.1.1.1 my public address 2.2.2.2 tunnel public ...
2
votes
1answer
2k views

How to force certain traffic through GRE tunnel?

Here's what I do. Server (public internet is 222.x.x.x): echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf sysctl -p iptunnel add gre1 mode gre local 222.x.x.x remote 115.x.x.x ttl 255 ...
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0answers
89 views

For a typical broadband ISP, are nodes on the same subnet routed together or are they bridged?

For a typical broadband ISP, are nodes on the same subnet routed together or are they bridged? In other words, what kind of path will a packet take when going from one node on a subnet to another for ...
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0answers
654 views

Routing on CentOS with multiple subnets

I have a server with 2 VLANs on a NIC, configured as follows: eth0 Link encap:Ethernet inet addr:192.168.10.20 Bcast:192.168.10.255 Mask:255.255.255.0 eth0.10 Link encap:Ethernet inet ...
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0answers
721 views

Some client in my network, sometimes can't ping Gateway and DNS server

I've a local network with 100-150 clients, one Core Switch and 10-12 switch that Switchs are connected to the Core Switch and clients are connected to switchs. In my network sometime some clients ...
0
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0answers
491 views

Multiple VPN connections on the same Computer at the same Time with the same Subnets

What's the best approach for such scenario? : One machine „GATEWAY” SERVER with configured multiple VPN connections. PC1, PC2, PC3, PC4 are the clients that with the same time wants to connect to ...
0
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0answers
303 views

Cisco 1841 - Acting as a PPPoE terminator?

We have 2x Fortigate 200B firewalls that we wish to operate in Active/Active HA mode - though, obviously, they cannot do this with PPPoE/DHCP enabled on the externally facing interfaces. To overcome ...
0
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0answers
204 views

Load-balancing PPTP connections

I'm trying to load balance two PPTP connections, connected to the same server. I use the following script, but there is no send and receive via PPTP connections. What part am I doing wrong? Are there ...
0
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0answers
3k views

PPTP defaultroute. Want to route all traffic via ppp interface

I'm experiencing a problem described here: http://pptpclient.sourceforge.net/howto-diagnosis.phtml#lots_of_data. If I use defaultroute in peer conf or manually add route add default dev ppp0 ...
0
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0answers
197 views

how to whitelist ip, port, protocol and app on a router?

I am looking for the simplest but robust solution to allow user accounts under Windows Server 2012 to use GitHub.com with the GitHub app, but otherwise not a peep is allowed from the server to reach ...
0
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0answers
800 views

Fortigate VPN can't reach site

I've two Fortigate's here and I use one of them for each site. Site A Site B 192.168.2.0/24 <---------- VPN ...
0
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0answers
75 views

OpenVPN - Routing from one VPN into another

I have the following situation. I have a root server, which acts as a VPN server for my company network and as a VPN client to multiple customer-networks. Every seperate connection works (I can ping ...
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42 views

simple subnetting, regarding vpn

i am using 2 cisco rv180 to build up a ipsec tunnel. thats working. but i cant get any packets trough the tunnel. first i was using: local: 10.0.0.X 255.0.0.0 remote 10.0.1.x 255.0.0.0 but 0 ...
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0answers
239 views

Using public interfaces on a server connected through a GRE tunnel

I'm pretty new to networking so please forgive any terminology mistakes. I have 2 servers connected with a GRE tunnel. Server1 (10.0.0.1) ----> Server2 (10.0.0.2) I want to be able to bind to the ...
0
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0answers
48 views

Two network interfaces access from the third subnet

I faced the following problem. There is server (Ubuntu 12.04) with two NIC that have IPs 192.168.40.147 (eth0) in 192.168.40.128/27 subnet and 192.168.40.165 (eth1) in 192.168.40.160/27 subnet. Now we ...
0
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0answers
518 views

Suddenly cannot reach (ping) remote server on a remote site

We have 2 sites linked together with VPN tunnel (Fortigate 60C devices). On each site I have ESXi server with a couple of VMs. Normally, everything works fine. Site 1 (S1) subnet is ...
0
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110 views

Routing static IPs

This is probably a simple question for you experts. I have a BT infinity business broadband account, that offers 5 static IP addresses. I'm trying to expose a server on one of those addresses. This ...
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40 views

Routing SIP client thru WAN router

I may ask again: I have following setup: SIP Client on LAN can make calls, etc thru PBX (is a closed device). I want the same for the remote SIP client. Can I configure all in the WAN router ? May ...
0
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0answers
75 views

tunnel two windows or linux server with routing packets

I would like to use IPIP eoip tunnel for windows/linux. In addition, It's not necessary to be IPIP, I want to route connection from server 1 to server 2. You can see following flowchart: ...
0
votes
0answers
154 views

Open port and route incoming traffic back to the connected client - OpenVPN

I did my own VPN setup on a CentOS box and it's working very nice and smooth. However I would like to add a feature that I open a specified port on the box for the incoming traffic that should be ...
0
votes
0answers
117 views

Why NATted packets have different source ip addresses?

I've got ubuntu box with nat. Here is the problem: root@office.redhelper.ru:~# tcpdump -i tap0 host 194.190.8.141 -n tcpdump: verbose output suppressed, use -v or -vv for full protocol decode ...
0
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0answers
90 views

virtual NIC, local routing and linux kernel routing table

from this article: http://backreference.org/2010/03/26/tuntap-interface-tutorial/ the author created a tun interface # openvpn --mktun --dev tun2 # ip link set tun2 up # ip addr add 10.0.0.1/24 dev ...
0
votes
0answers
615 views

How to enable multicast routing in TMG 2010?

I have a TMG 2010 firewall between some office networks, which handles routing and firewalling; I need to let some application-specific multicast traffic flow between these networks; this is UDP ...
0
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0answers
443 views

Routing issue with KVM: Gateway on different Subnet than VM

I have Server at hetzner.de, with a /29 subnet for running KVM-VMs. The VMs get network access via a bridge interface. I'm currently using two IPs from the subnet. The VM-host is running Ubuntu 12.04 ...
0
votes
0answers
55 views

Is there a way to diagnose *where* comms to a port on a windows machine is being blocked?

I am developing a system that comprises an email server. I have so far been unable to connect on port 25 (using telnet), despite having checked the following are set up correctly. Connections to port ...
0
votes
0answers
120 views

ASA 5505 Dedicate WAN Route to Voice Vlan

I've Got multiple WAN connections currently and I plan on moving towards a Active/standby Configuration in the near future, I have two asa 5505's with SecPlus licenses, the device is currently ...
0
votes
0answers
72 views

usage of RIP in production networks (routing protocol)

Based on the Cisco textbooks, link-state routing protocols (e.g. OSPF) are preffered over distance-vector protocols (e.g. RIP) and the reasons cited are typically convergence time and loop prevention. ...
0
votes
0answers
155 views

Is it possible to set up a management VLAN on HP switches without configuring routes on the WAN routers?

The network I help manage/maintain is configured like so: Location A - 10.0.0.0/22<br /> Location B - 10.0.4.0/22<br /> Location C - 10.0.8.0/22<br /> etc. Our ISP owns and ...
0
votes
0answers
76 views

DNS Routing Issue on Our Wireless Router

We have a domain we are hosting internally. We then have a Guest Wireless Belkin Router setup to allow traffic off of our network. The Guest_Wireless Router is setup in front of our firewalls, not ...
0
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0answers
37 views

Intermittent Server Response Failure - Not Software Related - How to find source of failure?

Symptoms: No response to HTTP, FTP, SSH. Usually the problem "resolves" itself within a minute or two of my first attempt to connect, and I can then connect by any method. Symptoms come up suddenly, ...
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554 views

Policy-based routing with openvpn

I just want to check with you if the config i have made is correct. I have my goflex with archlinux installed on it. The NAS is connected to the router (router IP is 192.168.100.1)- the NAS IP is ...
0
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0answers
330 views

Ubuntu 12.04 routing with 172.16.0. addresses

Having a issue very similar to linux routing bug? I have a ubuntu 12.04 system(kernel 3.10) with ifconfig as eth0 Link encap:Ethernet HWaddr 40:61:86:c9:a2:5f inet ...
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0answers
976 views

Windows 7 workstation can't access file shares over VPN

Windows 7 workstations that are joined to a Windows Server 2003 R2 domain are unable to access file shares after being moved to a remote location via a VPN. The workstations were previously on the ...
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votes
0answers
12 views

After restart routing does not work

Every time my windows 2008 R2 server restart, routing in my network stop working. I can acces to server remotley from internet but not from network, cannot even ping any pc in network. We found ...
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0answers
27 views

routing subnet - can not get to all hosts

I'm trying to set up a network with routing between two different subnets via a 3rd subnet. Below is a diagram showing the setup with the two routers that run CentOS. ************ * 10.0.0.1 * // ...
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0answers
27 views

Two Internet Connection one PC Router (Ubuntu Server)

We currently use the internet connection for the needs of the local network and to access local resources remotely via VPN. We want to divide both these needs by installing a new internet connection ...
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0answers
12 views

Route traffic to internal device on local address for internal clients

There is no DNS server at the site, so the URL is always resolved to an external address on the Firewall. Hence traffic originates on the local network, goes out the firewall and cannot connect to the ...