the process by which data packets on communication networks are forwarded into the direction of their ultimate destination by routers.
0
votes
0answers
16 views
How to control routes added by RasDial
I am using the RasDial function on a Windows box (Windows Server 2008) to dial a device from which the server then reads data. It seems that some new routes are added to the network routing table when ...
0
votes
0answers
8 views
Bound external Cisco CIGESM ports to a specific BladeServer
We have an IBM BladeCenter with 14 blade servers and one external Cisco CIGESM for Ethernet connectivity.
Since this hardware is a little old, we will use it for other services, and we want to run a ...
-1
votes
1answer
84 views
What is the first octet in the external network destination defined by bgp? [on hold]
What is the first octet in the external network destination defined by Border Gateway Protocol?
-1
votes
0answers
18 views
Server and workstations have internet connectivity but workstations cannot communicate with server on LAN [on hold]
We were experimenting with LogMeIn Hamachi recently on our server, and now have a network connectivity problem (even after uninstalling the Hamachi VPN client).
Our network comprises of an SBS 2003 ...
0
votes
0answers
36 views
Linux iptables NAT
So I need to setup a server that servers a NAT server for IPMI network
xxx.xxx.xxx.xxx = external IP(internet IP)
aaa.aaa.aaa.aaa = internal IP A
bbb.bbb.bbb.bbb = internal IP B
User 1 -> ...
14
votes
2answers
265 views
RFC 1918 address on open internet?
In trying to diagnose a failover problem with my Cisco ASA 5520 firewalls, I ran a traceroute to www.btfl.com and, much to my surprise, some of the hops came back as RFC 1918 addresses.
Just to be ...
0
votes
0answers
13 views
Route traffic from one Squid server to another
I'd like to get some help to know how I can do this. The fact is that I have two servers and I'd like the route from me to the internet to be like this:
Me -> Squid server 1 -> Squid server 2 -> Web
...
-1
votes
0answers
31 views
Unable to ping Default Gateway [closed]
I have created inter Vlan routing on Layer-3 switch and also created a default-route on switch (ip route 0.0.0.0 0.0.0.0 192.168.1.1). However, Inter Vlan routing is working pretty well. But I am ...
-1
votes
2answers
37 views
using server as default gateway with static routes [closed]
Given a server or workstation (e.g. windows7, windows server 2008R2) with 2 NICs, can I use it as a simple gateway between 2 LAN segments using only static routes, or do I need to set up additional ...
-1
votes
0answers
22 views
ICS (internet connection sharing) in Windows Server Core 2012 [closed]
I would like to run server core 2012 with ICS and i've tried looking around for information about it but the only thing i found that it wasn't available for 2008 due to it not having the Shared Access ...
1
vote
3answers
52 views
Securing a guest VM to give it internet access, but block access to host LAN
I have a Linux guest VM running under a Windows host. If I set the networking mode to NAT, the guest can get internet access (which I want), but can also access the hosts LAN (which I dont).
For ...
0
votes
1answer
49 views
Proper way to connect Cisco Small Business Switches? [closed]
First time network engineer here. I don't have a large budget, so I need to learn all of the skills necessary without pulling in a bunch of vendors. I'm charged with building out a 350port network in ...
0
votes
1answer
15 views
Forward packets on different private IPs and interface aliasing
I have a server with 2 public IPs. I configured interface aliasing to hold the second IP:
# ifconfig
vmbr0 Link encap:Ethernet HWaddr 4c:72:b9:4f:18:5f
inet addr:public.ip.number.1 ...
2
votes
2answers
25 views
Cisco Network Object NAT to get Internet?
So I've inherited a Cisco ASA 5505, and I have no experience whatsoever with the things! There are two Network Interfaces both WAN facing, and the LAN interface of course. Now in NAT rules, there are ...
0
votes
1answer
31 views
Site to Site VPN Tunnels
This is more of a theoritcal question then a problem. With regards to Site to Site VPN links, let's for the sake of the question say we have two Sonicwall Firewalls.
Site A and Site B
SonicwallA ...
-1
votes
0answers
14 views
linux system with ethernet and wifi can't always access wan side of wifi router [closed]
I have an embedded linux device with an ethernet and wifi adapter.
The ethernet adapter has two addresses:
eth0 is 192.168.9.2
eth0:1 is 192.168.2.153
This is connected to a second NIC in my ...
0
votes
0answers
15 views
OpenVPN sets wrong interface to access VPN on windows
I have set up 2 VPN servers, but when applied same config to the second one, ran into many issues. I am using a Windows client(Securepoint), and need to route all traffic thru the VPN. The exactly ...
1
vote
0answers
48 views
Setting up Windows Server 2012 Foundation to route all Internet traffic through an OpenVPN connection using RRAS
First of all I'm not (yet) a fully trained IT professional but just a college student so please forgive me if some of the things I'm about to ask might seem "stupid" because the answers are totally ...
0
votes
1answer
24 views
Site-To-Site VPN Failover
Conceptually, how does this work/ would be configured in a Cisco environment, I realise this is quite an open question so please let me narrow it down.
Let's say we have two sites: SiteA and SiteB, ...
0
votes
0answers
13 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
1answer
40 views
Route being ignored on core Cisco 6500 switch?
This is less likely a bug, and more likely a lack of my own understanding on routing.
I am having an asymmetric routing issue where return traffic is going out the wrong firewall. I have an explicit ...
1
vote
0answers
36 views
SUSE YaST routes not in kernel route -n
I'm using opensSuSE as a router. eth0 is the WAN nic, eth1 is the LAN nic. I also have a tun10 device, which I'm using with an OpenVPN client connection.
I want yast routes to specify what traffic ...
0
votes
0answers
24 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 ...
2
votes
1answer
23 views
How to set mark on packet when forwarding it in nat prerouting table?
I have a few port forward rules like this
iptables -t nat -A PREROUTING -p tcp --dport 46000 -j DNAT --to-destination 172.16.8.2:46000
iptables -A FORWARD -p tcp -d 172.16.8.2 --dport 46000 -j ACCEPT
...
0
votes
0answers
84 views
Why NATted packets have different source ip addresses?
I've got ubuntu box with nat. Here is the problem:
[email protected]:~# tcpdump -i tap0 host 194.190.8.141 -n
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
...
1
vote
3answers
57 views
Properly configure two eth interfaces on different subnets
Can anyone with heavy background in both Linux and Networking help me out? I've scoured the Internet looking for a clear answer for this and I've even compared a box I have access to with the same ...
0
votes
0answers
4 views
ASP.net URL Routing does not work on Windows EC2 instance
Recently we created a Windows Instance on Amazon EC2 and deployed our application.
Everything is working fine except URL Routing. For this I have googled everything and tried all the possible options ...
0
votes
0answers
19 views
direct web request to a server outside my router subnet
I need to forward all https requests to server 192.168.0.x...but my router can only forward to 192.168.1.x.
Have a quick look at my screenshot.. currently all http requests to the public internet ...
0
votes
0answers
21 views
routing to a specific subnet in pfsense
im having troubles with static routing.. documentation are no help for me.
my pfsense has 4 NICS and as ff:
WAN - ISP
LAN - 192.168.5.180 (local connection to my other servers)
OPT1 - (VLAN 5) ...
0
votes
1answer
21 views
Policy Based Routing Not Working
We've just implemented a secondary internet connection. It will be used as pure failover so for the time being I just want to avoid async routing issues.
I've setup 2 routing tables:
fw1 ~ # ip ...
0
votes
0answers
25 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 ...
1
vote
0answers
28 views
IPv6 routing over OpenVPN
Trying to learn how IPv6 works with OpenVPN, so I wanted to setup following scheme.
I have a VPS server (Ubuntu), which have been allocated a /48 subnet.
ISP ipv6 gateway is XXXX:XXXX:XXXX::1
Server ...
-2
votes
1answer
57 views
Layer 3 switching in data center [closed]
I have currently 3 uplink ports in the data center with 3 different subnets. They connect to 3 servers. I want to make it only 1 uplink and connect it to a switch so ip addresses can be accessible ...
0
votes
1answer
38 views
Configuring routing for network faults simulator
I'm trying to configure routing on my test machine to pass all traffic via the network errors simulator (WANem).
WANem runs in a virtual machine, in the same network with internet gateway. It has NAT ...
0
votes
2answers
49 views
Routing through OpenVPN gateway
I have the following setup:
++++++++++++++++++
+ OpenVPN server +........ . . . . (cat pictures)
++++++++++++++++++
|
|
...
0
votes
1answer
57 views
ipsec routing / strange routing behavior
I have following network configuration:
Office1 <-- openvpn --> office2 <-- ipsec tunnel --> branch office
Office1 and office2 are on Debian, Branch office: juniper srx100
Office1 ...
1
vote
0answers
62 views
Smartphone conflicting with LAN?
Recently, I've been having sporadic problems with internet connection on some computers.
It turns out that an IPhone, when connected to the wlan, was causing this. These computers with Internet ...
7
votes
2answers
86 views
Routing via Cisco ASA is changing TCP sequence/ACK numbers
Our network has a dedicated VPN appliance that sits inside the office network. We have a Cisco ASA with a static route that routes the VPN subnets to the VPN appliance. So a typical request from the ...
0
votes
1answer
28 views
How to get Juniper SRX220 to respond to multiple IP Addresses
How can I get an SRX220 to respond to multiple ip addresses on same subnet, but with different gateways.
e.g.,
Subnet: 1.1.1.40/30 (.41 gateway, .42 actual ip)
Subnet: 1.1.1.44/30 (.45 gateway, .46 ...
1
vote
0answers
16 views
Redirecting OpenVPN Server routes towards other VPNs to clients
I have an openVPN Server that share a network in tun mode, the main network that it share is on the class : 192.40.190.0/24 .
The config file that I have on the Server is like the following :
local ...
2
votes
1answer
60 views
Company VPN on same subnet as home network
My company has a PPTP VPN (I know it's not very secure) on a 192.168.1.0 /24 subnet.
For people connecting from their home networks, file sharing doesn't work if their subnet is 192.168.1.0 /24.
Some ...
-2
votes
1answer
36 views
vlans communicate with each other
I am setting up three vlans in a cisco router with the following configurations.
Vlan 10
Subnet: 192.168.1.0/24
Netmask: 255.255.255.0
Gateway: 192.168.1.1
Vlan 20
Subnet: 192.168.2.0/24
Netmask: ...
0
votes
0answers
58 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
votes
1answer
40 views
IP Routing on Windows 7 [closed]
I'm really struggling to understand how routing works in Windows.
I have a Windows 7 machine with two NICs:
172.16.1.20/16 - DHCP on company LAN, routed through proxy on 172.16.0.18, gateway ...
0
votes
0answers
37 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 ...
2
votes
1answer
89 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
3answers
69 views
Redirect Outbound HTTP to port 53 iptables [closed]
I am new to iptables and would like to reroute all outbound HTTP traffic on my router from port 80 to port 53. Is this possible?
Thanks in advance for any help.
Eric
*Edit
I ran
iptables -t nat ...
0
votes
0answers
24 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
42 views
Proxmox Network Configuration
i installed ProxMox on debian squeeze 64 bit , i follow the instruction and here we got at interface
Code:
# cat /etc/network/interfaces
# network interface settings
auto lo
iface lo inet loopback
...
1
vote
1answer
49 views
iptables: Allowing only established outgoing connections like DMZ
I want to simulate a DMZ like scenario where server1(inside DMZ, 10.1.1.0) should be able to respond to any incoming connection and cann't make a new outgoing connection on its own.
I would ...
