Networking :: Split Routing - Traceroute Not Displaying Unrouted Hops
Dec 16, 2010
I've used linuxquestions.org from time to time, but never needed to register until now.An in-depth explanation of this issue is already described over here: [URL], so I will merely quote it again here - it seems nobody knows the solution over at Ubuntu's forums...:
Quote: I recently switched my home server from debian lenny to ubuntu maverick. I've managed to port all my configs and stuff and so far I'm very happy. There's one tiny thing that's griping me, that I never experienced before with debian's (older) packages/configuration... Here's the situation: My server dials up 2 pppoe (adsl) interfaces (different isp's) with split internet routes.
If I run a general traceroute to an internet IP, all the hops which are not routed via the same interface as the destination host/IP, will appear as "* * *" in the traceroute. This was never the case before and it would be preferred to see the IP's of all routers along the way regardless of whether they are routed... (I used to be able to see IP's like 10.0.0.x before through INTERNET traceroutes if they were hops along the way [IP's which would be unreachable if traced directly], and that's no longer the case) - isn't this kinda defeating the point of traceroute?
If I traceroute to google, it hits my router and stops there. Generically, my Setup is this. AT&T Uverse residential gateway ---> wired to 54g router running tomato ---> wireless ethernet bridge to 54gl router running tomato in another room ---> wired to ubuntu and win7 box.
The ATT RG hands its external IP over the the 54g running tomato. the 54gl running tomato is a wireless ethernet bride in the den running the same with 2 machines wired to. The two machines are static IP to the first router, which does all DCHP, stuff like that. The Windows box is fine. The subnets are the same. What should I be looking at to figure this out? This is the only "network" issue I have come across.
Why linux traceroute uses UDP protocol, we have basic ICMP protocol which is used in MS-windows tracert.Any specific use of traceroute using with UDP,TCP than ICMP?Windows is displaying all HOPs address but linux printing *.*.*
As i've installed the new fedora update packets ,i've seemed to develope a strange networking problem .. Network description Fedora 15 with 3 LAN adaptors eth0 > LAN (IP address 192.168.0.254)eth1 > network connected to a pppoe conection eth2 > WAN to another provider. Ok so let's ignore eth2 because i've disable mangle(i was using trafic shifting on some ports). So now i'm using it as a simple NAT server .. so the problem is : >>my server is not responding to the traceroute command is it should .. the network works thou but this is what i get. C:UsersDUAL>tracert google.ro
i know exactly what i need to do, im just not familiar enough with command line to do it properly.i have 7 computers.the first 4 are connected to a router via wireless at one end of the house. of the last 3 only 1 will be able to access the router via wireless, so it needs to share it's one wireless connection via ethernet. this computer i'm going to call 'server'server will have two IP'swlan0 192.168.1.6 this connects to the router that has internet access.eth0 i intend to have the following settingsip:192.168.0.1sub: 255.255.0eth0 will connect to a second router, where the cat5 cable goes from the server, into the internet port of the router where i will define the router's static IP:IP: 192.168.0.100sub: 255.255.255.0gateway 192.168.0.1i have then set the router IP for LAN handling as 192.168.27.1 and all ethernet connections will have a 192.168.27.x IP.
so i need to know how to, without a gui application, use the terminal to assign server eth0 a proper IP address, and tell the server to take the connection it has and share it through eth0 to supply internet for the last 2 computers via ethernet.i had it set up in this way with a windows machine being the one that had the wifi access, but i'd rather have it setup for the ubuntu server to do this task. security is imperative for these 3 remaining machines, so just getting 2 more wifi adapters for a connection to the initial router isn't an option.the 2 that connect to server do so through SSH and though server IS connected via wireless it only makes outward connections through
So, I use Ubuntu 10.10 on an old Dell laptop as the router for the house. It shares its Vodacom 3G with the rest of us, via the network port of the laptop. This works fine. We can all surf to our hearts' content.I can also VNC into the desktop of the router machine if I ever need to accomplish X, Y or Z on it, which is handy.However, I cannot for the life of me SSH in, or connect to the MySQL server that also lives on that machine. This is a pain.What I want to do is set up a database on a remote server, and then tunnel in via SSH. I'm trying to test that configuration using local machines on my network. My desktop machine happens to be XP, and I'm using Putty to try to initiate the SSH connection, but I keep getting a message saying NETWORK ERROR: CONNECTION REFUSED.
My setup is...I have a wireless access point using laptop as a gateway. The AP is also connected to a switch as is the laptop. So the laptop has two interfaces one wireless and one wired. A third device is using the AP to connect to a server on the internet. The AP sends the packets to my laptop where they are dropped. I've been looking for a solution to this problem without success. Basically is there a way for my laptop to forward all packets it sees from a certain IP address to whatever destination address they have?To clarify, my laptop is just the gateway of the AP and none of the packets are addressed to it at all, it just picks them up using a sniffer or similar tool.
I have a pc with debian 6 (without GUI) installed on it and want to use it as server at home. It has 2 ethernet nics. Now i want to configure the routing process. Searched internet for a long time found something but couldn't get it work.
When setting up an SSH proxy, I know you can configure Firefox to route DNS requests through the proxy. Is this possible from linux directly? I'm trying to use wget through the proxy, including DNS lookups.
I have two subnets which I am interested in connecting.
Some basic network details:
Subnet A:
Subnet B:
I am trying to think of any further relevant details, but that seems to be it to me. If I forgot anything, please tell me.
Ok the question. WHAT do I type? (Explicitly!) And WHERE do I type it? In order to reach ubuntu-01.tec.lan, or ubuntu-02.tec.lan from perpetrator.tec.lan or rapine.tec.lan?
I'm interested in using actuall ROUTES. I can already achieve results similair to this with either a NAT firewall, or with VPN.. but that's not what I am interested in.
From what I have found out so far, I should need something like the following:
I'm newbie to Wireless. Currently I try to implement EAP-TLS but firstly I need to get the hardware work, allow Access Point to Route from Wireless to Wire (LAN DNS server).
I'm running 2 asterisk box (Centos) ,and the two servers are connected through 2 iax trunks.on one server i have 2 nics ,each one is connected to internet,now i want to use isp 1 for the first trunk and isp 2 for the second trunk.
iax 1 is listening on 12345 iax 2 is listening on 11223
is there a way to split traffic on both nic using ports (netfilter iptables)?
I want to use tab networking in my kvm with routing.Can any one guide me how i can do it. i have been reading different guides over the net but not understand any one clearly.I have read this[URL].. One problem is this all my server are remote and no gui is running.I am able to install kvm with ssh console with -nographic and -x "console=ttyS0" option now i want to change from bridging to tap networking with routing.And i have live ip on kvm guest/Virtual machine.
IN LAN default GW box I have a routing rule of 172.17.1.0 192.168.180.100 255.255.255.0 UG 0 0 0 eth3 that sends packets matching 172.17.1.0/24 to eth3 etc. When I ping 172.17.1.50 - it goes correctly when ping is issued in the same box (LAN GW) - falls through to default rule when the ping is done in LAN's boxes i.e. it goes to the LAN GW box and then to Internet incorrectly instead of going to eth3 and 192.168.180.100.
Is there any way of seeing why the packet matches or not the routing rules?
I have a network routing problem that I need to fix using a PC with ubuntu installed.
Here are the details of my problem: - I have two networks. - The first network is an ADSL router with subnet 192.168.1.x. I do not have access to the router nor change any of its configuration. - The second network has a subnet 172.26.x.x and connect via a wireless access point. Some of the devices connected to the network require to have static IPs. - I have a PC with ubuntu installed and two ethernet cards: one connected to the first network and the other connected to the access point. - I need to share the internet connection between the two networks using ubuntu. I already tried before on windows and the sharing worked when both networks were configured to use the same subnet. Once I changed the subnet of the second network, internet sharing stopped working.
Im having a issue with routing internet traffic from my router two different subnets (vlans).
Theres my setup:-
Server:
Both eth0,1 are running dhcp (two scoopes) that works fine!
The output of route -n is:
I have ip_forwarding on aswell, but i can ping the ip on the server running that dhcp scoope ie ping 192.168.4.1 works great but i just cant get the internet on the clients.
I have two linux boxes running RHEL 5.5 with internal ip addresses 10.0.0.114/24 and 10.0.0.118/24, and usual gateway 10.0.0.1. There's an apache listening on both ports 80 and 443 for several websites. This works nice, but the feature for load balancing has to be added. For this, externally, but in the same subnet, a hardware device has been placed for load balancing (we call it "F5"), with internal ip 10.0.0.152 (vrrp for 10.0.0.153 and 10.0.0.154). There's a service address that does NAT via round robin to the servers, 10.0.0.208, managed by the F5 balancer.
If I set as gateway the ip 10.0.0.152 in both nodes, I can use the service address for browsing http and https, *BUT* at a cost that ssh and any other connections, at OS logging level, come from 10.0.0.1, which is innaceptable (i.e., I can' set proper security, regardless the F5 is badly configured), so I have to find another way for this. So, I thought of using iptables mangling capabilities, and my thought is that just changing the default route of the incoming http(s) traffic, everything should be ok. I've done the following:
If I tweak the hosts file in my M$ workstation to test individual access for each server, I can browse the websites with no problem, but if I set the service IP address, I get an error "Document contains no data" in the browser after just a few seconds. Apache logs show nothing in its logs. I can see packets arriving, but seem to go in a loop. I can provide some output, but since surely I'm making some mistake in the process, if I get help with the proper knoweledge about how to fix it, the problem will be solved. But if still someone needs it, I can provide more data.
from the router it split into 2 connection one to my GW (linux debian) and another to a switch which is connected to a web/email server and the gateway.
My gw use x.x.x.27 and x.x.x.26 (everything I use on these ips is ok)
on the web/email server I have x.x.x.28 29 and 30
With this setup it's ok but I want to eliminate the link to the switch and make it pass thru the GW and i can't manage to get it work!
I am sharing my DSL internet connection using a modem+wireless router (single device) to 5 systems. I want all my internet traffic to go through one of the linux boxes in my network.
The problem here is that wireless devices connect directly to the modem+wireless router.
Is such routing of traffic possible??
PS: I am not sure if i could convey my situation clearly...
I'm trying to work out how to route all traffic destined for the internet from all devices connected to eth0 to a wireless router access point via wlan0 on my Slackware box. I also have dhcpd providing ip addresses on the same subnet to any device connected to both eth0 and wlan0.
If I connect to the router/access point via wireless or directly to the Server via a crossover cable I can obtain an ip address from dhcpd, so that works. As far as I can see I just need to how to route between eth0 and wlan0 then I can provide internet access to those devices!
ifconfig:
Code:
eth0 Link encap:Ethernet HWaddr **:**:**:**:**:** inet addr:192.168.2.253 Bcast:192.168.2.255 Mask:255.255.255.0 inet6 addr: fe80::201:2eff:fe27:aea3/64 Scope:Link UP BROADCAST MULTICAST MTU:1500 Metric:1
I've been trying to setup an IPSec connection between two routers, but am having trouble with the actual packet routing.
My setup currently is two local networks (192.168.1.0/24[netLANA] and 192.168.0.0/24[netLANB]) that are connected to their own routers (192.168.1.1 and 192.168.0.1 respectively). The routers are both connected to the 194.26.1.0/24[netWAN] network. I wish to setup an IPSec connection between the two routers, to act in tunnel mode between the two local networks.
The first router is a linux box (on the netLANA network) that I am setting up using the ipsec-tools, and the other is a Netgear ProSafe FVS318G (on the netLANB). I've set them both up to have the same configuration for IPSec. Also, on the linux router I have setup a route like this:
Code: $ route add -net 192.168.1.0/24 wlan0
So that all traffic destined for the netLANB network will be routed to the wlan0 interface (netWAN in this case, and therefore over the tunnel).
My problem is that if I ping from any host on netLANA, I can see the ICMP reply comes back to the linux router, but it doesn't get back to the original host.
From the linux router, here is the tcpdump of the ping:
Code: $ tcpdump -n -S -i any 17:06:26.308353 IP 192.168.0.5 > 192.168.1.4: ICMP echo request, id 1036, seq 1, length 64 17:06:26.308780 IP 194.16.1.6 > 194.16.1.5: ESP(spi=0x0ea08914,seq=0x2f), length 116 17:06:26.316287 IP 194.16.1.5 > 194.16.1.6: ESP(spi=0x0be1036c,seq=0x2f), length 116 17:06:26.316287 IP 192.168.1.4 > 192.168.0.5: ICMP echo reply, id 1036, seq 1, length 64
I have a Pc that has 2 Ethernet and I have also 2 switch. I want the PC to become the router and be connected to 2 switch.How can I setup this one on FEDORA and I want to assigned for eth0 192.168.26.51 and eth1 192.168.22.51 for the IP.
