I have recently upgraded a computer from Wheezy to Jessie, and I'm having trouble getting an internet connection shared via Ethernet by another computer (the provider) to work on it.I have activated the interface of the Jessie computer and configured a static IP on it in the same subnetwork as the provider's ethernet interface with the following commands:
Code: Select all# ip addr add 192.168.123.201/24 dev eth0
# ip link set up dev eth0
I now would like to set the address of the provider as the default route with Code: Select all# ip route add default via 192.168.123.100 dev eth0, but I get the following error message: Code: Select allRTNETLINK answers: File exists.
Indeed, when I run Code: Select all# ip route, the following comes up:
Code: Select alldefault dev eth0Â scope link
I've tried to remove this default route to replace it with mine with Code: Select all# ip route flush table main and Code: Select all# ip route del default but these commands don't seem to work.
I am the new user to ns-2. I would like to know is it possible to send the keys or some value as the packet data (content of the packet) in ns-2 (for wireless environment).
I got a problem with my CentOS server. Somebody told me OpenVPN Requires different changes inside my firewall settings. That could be the problem why openvpn wont load..I receive this error on my CentOS panel when im trying to connect into the centos openvpn (with my winxp pc):
I have to do a .deb packet which will be placed in the repositories of the company.When this packet is installed, it only have to copy a plain text archive i've wrote before, to a path where it's being installed.The other requisite is that it have to watch if there's a program (vim) installed, if it's not installed, then the packet i have created shouldn't install.example:
# ls /home/loopin (as we see, this directory is empty) # apt-get install mypacket ...
After a long time that I didn't touch my PC I just forgot how to configure the routing table I trying to ping the router and get "destination host untraceable" I manually assign the ip of the machine to 192.168.1.2 .And the gateway ip to 192.168.1.1 the only problem now Is to get to the router interface on 192.168.1.1 to configure my internet and to browse
I'm having trouble to configure my debian (2.6.26-2-686) with some routing tuning. In fact, I have a VPN provider. I want my Squid Proxy use this VPN provider and I have to use policy routing because my ISP forbid IP spoofing.
I need to be able to do the following: Physical Router located at 192.168.40.1 On Ubuntu 10.04 Lucid machine:
eth0 with static ip 192.168.40.2 eth1 with static ip 192.168.40.3 eth2 with static ip 192.168.40.4
Associate a virtual address to eth1 with an entirely different network address such as 192.168.50.1 Do the same (virtual address) for eth2 -- e.g. 192.168.60.1 In the application:
register phone number A at 192.168.40.1 (The application will automatically use eth0 for this) register phone number B at 192.168.50.1 register phone number C at 192.168.60.1
Somehow forward all traffic (including the register request) sent to 192.168.50.1 to 192.168.40.1 as if the register had been made directly to 192.168.40.1. In other words, the app "sends" registration and traffic to 192.168.50.1 but then Ubuntu forwards it to 192.168.40.1 (but the app does not know that). Similarly, forward all traffic sent to 192.168.60.1 to the router at 192.168.40.1.
Do the same for the reverse, forward all traffic that the router sends back to 192.168.40.3 (eth1) to 192.168.50.1 (within the Ubuntu machine) so that the app knows it is for phone B. Similarly forward all traffic that the router sends back to 192.168.40.4 (eth2) to 192.168.60.1 so that the app knows it is for phone C. Thus, the application believes that it is registering at 3 completely separate routers on 3 completely separate networks via 3 separate network interfaces but in fact is really registering all three to the same router (but does not know that). Similarly, the router believes that it is receiving 3 separate registrations because it receives each registration request and traffic from 3 separate interfaces and thus 3 separate mac addresses (i.e., of eth0, eth1, and eth2). Traffic sent to and from the router for each of the 3 phone numbers (via eth0, eth1, and eth2) are not mixed because the translation happens in both directions.
for the last three days, I have been trying to get my drive ( LiteOn iHas624 ) to work. Unfortunatly, it seems that I can only use the burner with Nero4Linux or Brasero, but not K3B.DVD-RAM/+RW packet writing seems neither to work out of the box, nor by the setup as suggested in /usr/share/doc/udftools/README.Debian or the media4linux howto(just to name the most promising, i definitly read more on the issue).
I tried to format the DVDs in various udf revisions, as well as ext2 just to check, but without success.As I am close to the point where I would rule out the possibility to obtain package writing capability, I dare to ask for help.I would be very grateful for any hint or reading recommendation on the issue. Yours, Benjamin.
While using monofree package, trying to install mono presents a conflict but aptitude just erases monofree and installs mono anyway.Is there a way to force the system to keep monofree and show an error when I try to install something that conflicts?
I have a fedora 13 with two Internet links, but I'm having problems in configuring them. In the past 11 fedora works fine, on Redhat, Centos, only fedora 13 and 12 is not working the same configuration posted below:
# File rc.local ip route add 200.20.150.192 dev eth0 src 200.20.150.194 table 1 ip route add default via 200.20.150.193 table 1 ip route add 192.168.2.0 dev eth3 src 192.168.2.2 table 2 ip route add default via 192.168.2.254 table 2 ip route add 200.20.150.192 dev eth0 src 200.20.150.194 ip route add 192.168.2.0 dev eth3 src 192.168.2.2
ip rule add from 200.20.150.194 table 1 ip rule add from 192.168.2.2 table 2 ip rule add fwmark 1 lookup 1 ip rule add fwmark 2 lookup 2 ip route flush cached
# The route default is to link 1 ( 200.20.150.193 ) # Some configuration basic tested and not work with iptables iptables -t mangle -A PREROUTING -i eth3 -s 192.168.0.0/24 -j MARK --set-mark 2 iptables -t nat -A POSTROUTING -o eth0 iptables -t nat -A POSTROUTING -o eth1
My iptables do the identification mark of the packets, but some things happen that it could not do the routing of packages in Fedora 13 and 12, I don't really know what can be, I tried everything I knew.
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 am trying to simply address translate TCP packets from one destination IP to another destination IP (DNAT?) without getting the initial SYN packet. Is this possible? I do not think it is with DNAT since the conntrack needs SYN first.
I have given the command:
The problem is that the first packet that matches this rule will be the SYN-ACK and I suspect it is simply DROPPED.
I am sparing you the gory details of why I would do such a silly thing, but simply put; I need to intercept client-to-server packets through a tunnel, but allow server-to-client packets to follow through the regular network.
I have been working on this for many days w/o success and my learning curve is still steep. I can provide more details as needed.
My question is about the raw MX reply package structure. I've read the RFC and all relevant pages I could find, but I couldn't figure this one out. Say we do a google.com MX query.
The first answer (just the rdata part) will be: google.com.s9b2.psmtb.com But in the raw package, instead of the .com, you have c0 13. Then for the second answer, google.com.s9b1.psmtb.com, the raw package has, instead of psmtb.com, just c0 3a. So is the part after c0 a pointer towards another part of the message? Or what does it stand for exactly? I am puzzled by it, and don't know exactly where to ask... some of the networking people here might have a good idea.
From all the stuff that can enter an interface, how does it know when an IP packet has been *formed*? What if it's just random garbage entering there for whatever reason? Also, can Linux do other protocols besides TCP/IP? This would be the problem, as I said above.
In application udp port listening with 3330 i am sending udp request from port 0.0.0.0:3330 to 0.0.0.0:3330 that is same port in the same machine....application works fine udp sending and receiving also fine.....for clarification ....is there any conflicts in the communication ?
I want to develop program to put (tunnel) sniffed packets into another packet, i already have sniffer code to capture packet, can some one give me use full site or simple code to do that.
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'm often on my corporate network but also need to be on another network simultaneously. At the moment I have to manually switch back and forth between the two. I'm using ubuntu 10.04. I've come across an excellent document that explains how to do this: "Linux Advanced Routing & Traffic Control HOWTO" by Bart Hubert. He mentions:
make sure that your kernel is compiled with the "IP: advanced router" and "IP: policy routing" features
I've downloaded the kernel sources, but I don't find any config options with names like these in them.
So my question is...how can I tell if the kernel I have has these config options. Failing that, how do I build a kernel that does support these things?
Additional use cases for this knowledge. (1) At work with desktop computer plugged into corporate network. Plug 3g phone into USB port. My corporate network wont allow me to access my external servers over ssh, but the 3g phone will. (2) At home on the corporate VPN, but would like to access my other local network computers.
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.
