Im trying to achieve the multiple uplinks/provider found on LARTC.org. I have to get the IP addresses from my interfaces (EF1 and EF2) by using a script, but i dont know where to look at for the default gateway from each interface which got their ip address from my ISP.
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I am using debain 6 and using a Sierra modem c888 to connect internet. I am using wvdial package for connecting the modem. I am able to connect internet. The question I have is, how do get the gateway address of the newly created ppp0 interface?
View 1 Replies View RelatedI have a requirement of switch between wireless network with a single wireless device. First it should be switched to adhoc mode and then after sometime switch to infrastructure mode to establish internet connection. Everything works fine except the gateway settings.
I have used:
system("route add default gw x.x.x.x dev wlan0") to set the gateway, where x.x.x.x is gatewayip address.
I have used this whenever switching happens in addition to ifconfig command to set the ip address and netmask. But this is not setting the gateway ip address. How to set gateway IP address?
System details below
OS :CentoS 5.3
Kernel :2.6.18
OS:Fedora core 6
I have just changed my gateway address,now I can access internet with my browser but unable to run add/remove software as it says no network connection available,system updates are not working as well. What should I do make these working?
when I do "route -n", I got:
Code:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
I need to change the static configuration, like I 169.254.0.0, I don't know how it got there also I want to delete 192.168.1.1 from a static gateway. How can I do this?
I would like to configure the eth0 manually. I can configure the ip address and sub-netmask but the system can't hold my gateway ip address (I added). It will keep it 0.0.0.0. I have no problem when I getting IP address from DHCP server.
View 1 Replies View RelatedI'm running Ubuntu 10.04 and my setup is as follows:
As you can see, I am directly connected to router 192.168.25.1, and so my ip address is 192.168.25.101. I want my ip address to be 192.168.13.101, and make router 192.168.13.1 my gateway router. Is this possible under the current physical layout (I do not want to have to connect directly into 192.168.13.1, but keep my computer where it is at)?
When I run tracepath, it shows 192.168.13.1 is one hop away.
What I've tried:
The problem is under this manual setup, I cannot ping 192.168.13.1 and running command netstat -rn returns the following:
This is slackware 12. I'm trying to share my internet connection (on eth0) with a computer connected to eth1.
eth0 is 192.168.0.101, eth1 is 192.168.1.100 (different subnets).
But when I try to make eth1's default gateway the same as eth0's, see the error I get code...
I am in a big confusion and searching an answer to calm down my mind.I have my eth0 has following configuration
` ` `
IP 192.168.1.100
mask 255.255.255.0
[code]....
I have installed ubuntu 9.04 Jaunty server from disk. I am connect to my corporate internet. I have put in my http_proxy everywhere I can find to put it. I am getting an ipaddress, gateway, broadcast,etc. My wired is connected. When I try to ping my default gateway it times out. %100 packet loss. I get the ipaddress of the gateway from the (route command).
My configurations on /etc/network/interfaces is correct(I am on another computer so I can't copy and paste) and I even tried updating the drivers for NIC card. I am using a Intel 82567LM-3. I have been working on this longer than I care to admit.
I have a computer with two interfaces: a fixed connection (eth1) and a modem (ppp0). My goal is to receive UDP packets from both connections concurrently (using the recv() function). The problem is, that the received packets reach the application only when the default gateway is set to that interface's address. For example, if I set the default gw to be in the eth1 subnet, only packets from eth1 reach the application. Other packets are received in the interface (checked using tcpdump), but they seem to be blocked somewhere. The policy defined in iptables is "ACCEPT" for all incoming packets, with no rules at all. I would like to know how to overcome this problem, and anyway how is the default gateway related to incoming UDP?
View 3 Replies View RelatedI have a dual-homed Debian server running squid, but not acting as a router. Simplied network diagram is below - there are other local hops between the gateways and the Internet.
Code:
(eth0 @ 192.168.44.2) <--> (Gateway1 @ 192.168.44.1) <--> Internet
(eth1 @ 192.168.55.2) <--> (Gateway2 @ 192.168.55.1) <--> Internet
Using Gateway1 gives a very fast, but not always reliable route to the Internet. Using Gateway2 gives a slower, but more reliable route to the Internet. The server uses Gateway1 as the default gateway.
I have written a script that pings three hosts on the Internet, and if all three are down, switches the default gateway to Gateway2. This part seems to be easy, but I'd like know if there is a way of routing a ICMP/ping out eth0 to a host, with all other traffic to the host going out eth1, so I can determine if the Internet is reachable via Gateway1 again.
I am realtively new to BGP. I use BGP in my network to advertise my /20 subnet. What i would like to know is what is the point of accepting routes from your neighbouring AS(ISP)?My ISP has given me a default gateway, and no matter what I want to reach on the internet I have to go through that default gateway, so why populate the routing table with soo many routes?also, as i understand it, there are 3 kinds of routes that you can accept, those are full routes, directly connected routes and default routes. What is the diffrence between them and again how do they affect routing since my network only has the one default gateway?
View 2 Replies View RelatedI have 17 system (sys1,sys2,sys3.....sys17) in my office, and i am willing to setup a dedicated system to act as a firewall for that i have selected sys1 with two NIC(eth0 for local network and eth1 for internet) and i have configured to access internet in my office for that i have opened a wellknown port 80.but my clients are not accessing the internet..
and please check my sample IP configuration !!!
interface : eth1 (ISP IP)just for example
IP :192.168.0.2
gateway:192.168.0.1
dns:202.56.230.5
dns:202.56.230.6
Interface : eth0 (my local lan )
192.168.1.1
255.255.255.0
IP address of xp clients ranges form 192.168.1.2 to 192.168.1.16 with default 255.255.255.0
my question is that which gateway address and dns i have to give to my clients for accessing internet ?...
I had a router crap out yesterday. I'd been testing out a new one for the last few days and just reconfigured it to be the main. Took the old one down and everything in my house (Windows 7 PC, XP Files server, Ubuntu PC , windows 7 laptop, android tablet, ps3, etc) seems to be working fine whether it be hard wired or wifi. All except my ubuntu 10.04 laptop. It worked fine before the swap so I can't figure out what's going on.
I'm able to connect to the new SSID without issue but I can't resolve any external names and when I try to ping the default gate way every other packet has (DUP!) behind it. If I'm hardwired I don't get the dup! when pinging the default gateway but I still can't resolve any external names. I have provided the results of an ifconfig and the results of a ping to the default gateway below.
cooley@Quigon:~$ ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=2.98 ms
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=3.04 ms (DUP!)
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=3.50 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=5.72 ms (DUP!)
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=8.09 ms
[Code]...
I posted it on another forum, but could not get response,So I have this cenOS, Ubuntu and windows operating system running on virtual machines.Now I gave them manual ip address, both ubuntu and windows machines can ping the default gateway, but not the CentOS.It should forward 0.0.0.0. to my cisco router address(192.168.5.254),
View 4 Replies View RelatedI'm looking for a method to assign a default gateway via dhcp randomly depending on ether the last char of the mac being odd or even, or the time the user connects. Is there a good reliable way to achieve this?
View 2 Replies View RelatedI have installed dhcp-server on ubuntu. And server is providing ip address to clients (Window machines) but not default-gateway but I have another network in my network and same configuration and same dhcp-server provides every information.
View 5 Replies View RelatedStruggling to get my Linux server accept ICMP redirects not originating from default gateway. No problem to get it working if the redirects is originating from def gw.I know it's not a good solution security wise, but my network is so cluttered I'm forced to do so.
View 1 Replies View RelatedClient which uses an ISP with a Linux machine (Server 1) with two network cards. Eth0 with ip 1.1.1.2 and gateway 1.1.1.1 these ip's is not public ip's and falls unders the isp's internal range, eth1 with the internal ip range. OpenVPN listen on eth0 for incoming connections. We want to connect to Server1 from external networks. Due to different reasons the isp could not get the routing sorted and give us an public ip on his network. We had to setup another bos (Server2) with eth0 2.2.2.5 and gateway 2.2.2.1 which is public ip's and eth1 with ip 3.3.3.5. Server 2 can communicate via the ISP internal network with server 1. I use DNAT to forward all incoming connections on server 2 to server 1 but the problem I have is that server uses its default gateway for the return packages and does not sent the reply back to server 2. My iptables rules looks as follows on server 2.
/usr/sbin/iptables -t nat -A PREROUTING -p udp -i eth0 -d 196.25.157.135 --dport 1194 -j DNAT --to 192.168.100.170:1194
/usr/sbin/iptables -A FORWARD -p udp -i eth0 -d 192.168.100.170 --dport 1194 -j ACCEPT
I'm using OpenWRT on a WRT54GS. I'm using wifidog in combination with openvpn. For those of you familiar with wifidog, my auth server is located at the other end of an openvpn tunnel and the "wifi dog gateway" is running on the WRT itself. I'm don't really think that wifi dog is the issue. Basically, I'm using openvpn with the "redirect-gateway" option which works well. In this mode, openvpn removes my current default gateway setting and adds the remote openvpn server as the default gateway (as it should). However, overnight, my default gateway on the local network keeps reapperaing (along with the openvpn one as well).
This causes confusion and I don't want any packets (But ovbiously the connection to the actual openvpn server) to go down this local gateway. Why do you think it reappears? Do you reckon openvpn is dropping connection and somehow the normal gateway is being added back? I *could* run a cron script which runs every minute or so with something like "route del default gw xx.xx.xx.xx" (where xx.xx.xx.xx is the default gateway which I don't want to be there) but that is quite messy and means that if I were to ever move the router I would need to reconfigure this and considering that I would like in the future to have many of these wifi dog gateways, this really isn't an ideal option (as every network will have a different default gateway).
I could not able to configure the default gateway ip address onto the system. i use the route command (" route add default gw 192.xxx.xxx.xxx eth0 ") to add a default gateway onto the routing table but it is "disappear" in the routing table when i had restart the service network.
View 3 Replies View RelatedI've been struggeling with this for a few hours now, googleing and so on trying to find an easy way to just switch which device I want as primary for internet connections. After long battles I'm at a loss, this is the current automatic routing
Code:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
85.225.76.0 0.0.0.0 255.255.252.0 U 1 0 0 eth0
85.225.76.0 0.0.0.0 255.255.252.0 U 2 0 0 wlan0
[Code]...
I need to place an Ubuntu machine on a network where I have a DHCP server which does not configure the Degault Gateway parameter (we don't want ordinary users to browse the internet). Is it possible to leave the machine using DHCP and define the Default Gateway manually (as in Windows XP i.e.)? How?
View 1 Replies View RelatedWhen I do ifconfig than IPv6 address is appearing on an interface. However when I run the system-config-network and select to edit same interface than it shows the normal ip4 192.168.1.x address. Why is it like that? ipv4 at one place and ipv6 at other?
View 3 Replies View RelatedI recently just upgraded from humble Linux user to confused Linux admin of my own virtual Linux server. When I issue the ifconfig command I get following output.
Code:
venet0:0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:1.2.3.4 P-t-P:1.2.3.4 Bcast:1.2.3.4 Mask:255.255.255.255
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
The WAN IP of the interface is not really 1.2.3.4 I just changed that IP for security reasons.What I am trying to figure out, is it possible to assign a private IP address to the same interface or can I only have one IP address per interface. I understand I have a mask of /32 so I am not going to be able to subnet the address to create any more addresses, so I assume I am stuck with the WAN IP (public IP) that I have, and just need to deal with it.
The reason I ask this is because I have been reading through several DNS/BIND tutorials/walk-throughs, and a lot of them specify setting up a intranet access with 192.168.1.1 address for the local DNS server, but since I am connecting to the sever via SSH I figure I do not need a private IP address.
Showing my ignorance, but why would this work
address 172.16.1.8
netmask 255.255.254.0
network 172.16.1.0
broadcast 172.16.2.255
[Code]....
Notice the 2 in address. Seems to me it doesn't like the network and wants it to be 172.16.0.0, but I am adding to a network already configured this way.
how to do a virtual interface under linux. I'm using for example eth0:1 so ifconfig eth0:1 192.168.0.20 netmask 255.255.255.0 for example.
However if i do eth0:1 hw ether 00:11:22:33:44:55 It changes eth0 as well. Where should i look into for creating a separate virtual interface that's simply bridged with one of the existing interfaces that has a separate ip and hw address that the os handles.
is it possible to set up a "gateway" with just one network interface? Basically, I have a cable wireless router which is connected to the internet. I want to have my network use a transparent proxy, however, the transparent proxy is on an ARM computer with only one network interface. So the proxy will act as the "gateway", which then forwards all external request to the Cable modem.
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Now, I need the cable modem to be in the same network, because I want to use it's wireless access point... Do I need to have two subnets? one between the Cable modem and the proxy, and then a second subnet as a virtual interface on the proxy to communicate with all the computers?
Someone just erased my HWADDR line from /etc/sysconfig/network-scripts/ifcfg-eth0. How can I obtain my original MAC address?
Code:
ifconfig eth0 does not work (it shows the wrong MAC address) since the HWADDR line from the file I mentioned above was erased. Also there is no ifcfg-eth0.bak backup configuration file.
