I am developing a kernel feature, using User-Mode-Linux.
I compiled 3.12.38 from source and downloaded a Debian fs.
However, I am not able to seet-up networking using following options here.
Are there any good source or info to go with this.
I have internet on wlan0.
EDIT:
I start with eth0=tuntap,,,192.168.0.254
and then inside UML UML# ifconfig eth0 192.168.0.253 up
I only get the output as:
modprobe tun
ifconfig tap0 192.168.0.252 netmask 255.255.255.255 up
route add -host 192.168.0.253 dev tap0
As mentioned, output is lacking a bit and more over a ping to 192.168.0.254 doesn't seems to work, with 100% packet loss.
Let us follow the steps to establish the following Topology:
VM-tap0(192.168.6.6)-------------(192.168.6.8)eth0-UML1-eth1(192.168.20.1)----------------eth1-(192.168.20.2)UML2
here, UML1 and UML2 are two UML instances running on VM as a host.
All uml_console commands are suppose to run on VM host.
Tun/Tap config:
VM <------>UML1 (ley us first establish the connection between VM host and UML1)
#host as root :
chmod 777 /dev/net/tun
tunctl -u vm -t tap0 (here vm is the VM user name)
echo 1 > /proc/sys/net/ipv4/ip_forward
echo 1 > /proc/sys/net/ipv4/conf/tap0/proxy_arp
ifconfig tap0 192.168.6.6 up
./linux ubda=CentOS6.x-x86-root_fs umid=debian1 [separate terminal]
uml_mconsole debian1 config eth0=tuntap,tap0
route add -host 192.168.6.8 dev tap0
route add -net 192.168.20.0 netmask 255.255.255.0 gw 192.168.6.8 dev tap0
#uml1
eth0=tuntap,tap0
ifconfig eth0 192.168.6.8 up
echo 1 > /proc/sys/net/ipv4/ip_forward
echo 1 > /proc/sys/net/ipv4/conf/eth0/proxy_arp
Now UML1<-------------->UML2
./linux ubda=CentOS6.x-x86-root_fs2 umid=debian2 [separate terminal]
uml_mconsole debian1 config eth1=mcast (if these commands fails, it means you have not compile the UML kernel with multicast ineterface enabled in )
uml_mconsole debian2 config eth1=mcast
again #uml1
ifconfig eth1 192.168.20.1 up
#uml2
ifconfig eth1 192.168.20.2 up
route add -net 192.168.6.0 netmask 255.255.255.0 gw 192.168.20.1 dev eth1
echo 1 > /proc/sys/net/ipv4/ip_forward
echo 1 > /proc/sys/net/ipv4/conf/eth1/proxy_arp
Try ping UML2 from VM and vice versa. You should be able to ping in both directions.
Related
I have a server within OVH network. Proxmox 4.3 was installed there as a supervisor and it's hosting 2 LXC containters. Both are running in 192.168.11.0/24 network setup on vmbr2 network for which I have also setup NAT like that:
auto vmbr2
iface vmbr2 inet static
address 192.168.11.1
netmask 255.255.255.0
bridge_ports none
bridge_stp off
bridge_fd 0
post-up echo 1 > /proc/sys/net/ipv4/ip_forward
post-up iptables -t nat -A POSTROUTING -s '192.168.11.0/24' -o vmbr0 -j MASQUERADE
post-down iptables -t nat -D POSTROUTING -s '192.168.11.0/24' -o vmbr0 -j MASQUERADE
I've also bought Failover IP from OVH, setup virtual MAC for it and assigned it to one LXC container (vmbr0 interface).
My problem is that I can access this IP on LXC server where this IP is assigned (obviously), but I can't do that from other LXC server. Connection just timeout when I simply do wget to it.
What am I missing in my configuration?
I found it. Apparently I missed routing entry on main host:
route add -host failover_ip gw main_ip
Thanks to this all LXC hosts have now access to my Failover IP.
I need to create a hotspot setup using hostapd for EAP-SIM,EAP-AKA and EAP-AKA' and test it with wpa_supplicant.
Currently I am able to use hostapd for WPA-PSK authentication, hostapd2.4 is used for this setup.I have modified the hostapd.conf for supporting hotspot but when I try to connect , the network will be always in scanning state and won't connect. The necessary parameters for HS20 in wpa_supplicant is also enabled.
The following are the supplicant parameters,
build configuration:
CONFIG_INTERWORKING=y
CONFIG_HS20=y
wpa_supplicant configuration:
Enable Interworking
interworking=1
Enable Hotspot 2.0
hs20=1
auto_interworking=1
Also have specified a credentials block which takes necessary parameters for authentication with hostapd.
Using wpa_supplicantv2.5.I also have a dhcp server running for assigning IP address and also a milenage db running for EAP-SIM,EAP-AKA and EAP-AKA' authentication.
Can anyone suggest what are the necessary basic setup for enabling hotspot in hostapd?
Step 1 :
iw list Check AP is listed
Step 2 :
sudo vim hostapd.conf
-------------------------- interface=wlan0 driver=nl80211 ssid=ath9k_SSID #SSID hw_mode=g channel=1 macaddr_acl=0 auth_algs=1 ignore_broadcast_ssid=0 wpa=3 wpa_passphrase=12345678
#password wpa_key_mgmt=WPA-PSK wpa_pairwise=TKIP CCMP rsn_pairwise=CCMP
#comment last 4 lines for Open
Step 3 :
sudo vim /etc/dhcp/dhcpd.conf
-------------------------- default-lease-time 600; max-lease-time 7200; subnet 192.168.1.0 netmask 255.255.255.0 { range
192.168.1.170 192.168.1.200; option routers 192.168.1.254; option domain-name-servers 192.168.1.1, 192.168.1.2; option domain-name "mydomain.example"; }
Step 4 :
sudo vim /etc/network/interfaces
-------------------------- auto wlan0 iface wlan0 inet static address 192.168.1.250 netmask 255.255.255.0
Step 5 :
sudo /etc/init.d/isc-dhcp-server stop sudo service network-manager stop sudo killall wpa_supplicant ps -N | grep -i hostapd # make sure there are no hostapd/wpa_supplicant processes are running
Step 6 :
Remove ethernet cable sudo ifconfig wlan0 192.168.1.169 netmask
255.255.255.0 sudo /etc/init.d/isc-dhcp-server restart => to set IP for STA sudo ./hostapd ./hostapd.conf -dddt Step 7: Connect from another device. Should be able to see the IP assigned.
I am new to openstack and I followed the installation guide of icehouse for ubuntu 12.04/14.04
I chose 3 node architecture. Controller, Nova, Neutron.
The 3 nodes are installed in VM's. I used nested KVM. Inside VM's kvm is supported so nova will use virt_type=kvm. In controller I created 2 nics. eth0 is a NAT interface with ip 203.0.113.94 and eth1 a host only interface with ip 10.0.0.11.
In nova there are 3 nics. eth0 NAT - 203.0.113.23, eth1 host only 10.0.0.31 and eth2 another host only 10.0.1.31
In neutron 3 nics. eth0 NAT 203.0.113.234, eth1 host only 10.0.0.21 and eth2 another hosty only 10.0.1.21 (during installation guide in neutron node i created a br-ex (and a port to eth0) which took the settings of eth0 and eth0 settings are:
auto eth0 iface eth0 inet manual up ifconfig $IFACE 0.0.0.0 up
up ip link set $IFACE promisc on
down ip link set $IFACE promisc off
down ifconfig $IFACE down)
Everything seemed fine. I can create networks, routers etc, boot instances but I have this error.
When I launch an instance it takes a fixed ip but when I log in into instance (cirros) can't ping anything. ifconfig with no ip.
I noticed that in demo-net (tenant network) properties under subnet in the ports field it has 3 ports. 172.16.1.1 network:router_interface active 172.16.1.3 network:dhcp active 172.16.1.6 compute:nova down
I searched for solutions over the net but couldn't find anything!
Any help?
Ask me if you want specific logs because I don't know which ones to post!
Thanks anyway!
Looks like you are using Fixed IP to ping..If so please assign floating IP to your instance, and then try to ping..
If you have already assigned floating IP and you are pinging using that IP..please upload log of your instance
I am trying to set up a traffic control server between the network and the firewall-router.
The server has two network devices:
Firewall <--> Server <---> NETWORK
It is running CentOS 6.4 x64 and I would like to use Etherape.
My idea is to have eth0 connected directly to our router and eth1 to our network.
eth1 would have two virtual interfaces, one with an IP to ssh the server and the other just forwarding with IPTables to eth0 with no IP. Of course, eth0 would not have any IP (we don't want to change the Gateway).
Any suggestion or better way to do this?
Thank you very much!!
Ok, finally it was quite easy. Install brctl and etherape, then:
brctl addbr br0
brctl stp br0 off
brctl addif br0 eth0
brctl addif br0 eth1
echo 1 > /proc/sys/net/ipv4/ip_forward
ifconfig eth0 up
ifconfig eth1 up
ifconfig br0 up
service network restart
ifconfig br0 XX.YY.ZZ.AA
That is a temporal configuration. If you reboot you have to re-do it. Here is a way to make it persistent:
http://www.tldp.org/HOWTO/Ethernet-Bridge-netfilter-HOWTO.html#toc3.3
Finally, (installing if you are in a Windows Box, Xming and Putty and) connecting as root to XX.YY.ZZ.AA with X11 redirection, execute etherape and you will have you remote traffic control.
To make it easier, I will recommend to add the filter:
ip and not ((src net XX.YY.ZZ.AA) or dst net XX.YY.ZZ.AA)
To avoid the X11 traffic between the server and your box.
I have two virtual TAP interfaces tap0 and tap1 on my machine. They have IPs 10.0.0.1 and 10.0.0.2 respectively. They are both connected to each other using socat. Both have netmasks 255.255.255.0 (and hence are on the same subnet). With this setup, I try pinging 10.0.0.2 through tap0 and vice versa. This doesn't seem to work for some reason. Although tcpdump shows ARP packets from tap0 reaching tap1, there are no ARP replies and hence no ICMP requests and hence no ICMP replies. Using a TUN device instead of a TAP device bypasses the ARP request/response cycle, but now the ICMP requests show up at tap1 with no ICMP response coming back.
I have tried a couple of things like enabling ip_forward ( echo 1 > /proc/sys/net/ipv4/ip_forward) and disabling reverse path filtering ( echo 0 > /proc/sys/net/ipv4/conf/tap0/rp_filter and echo 0 > /proc/sys/net/ipv4/conf/tap1/rp_filter ).
Here are the commands to reproduce my problem :
sudo socat TUN:10.0.0.1/24,tun-type=tap TUN:10.0.0.2/24,tun-type=tap
sudo ifconfig tap0 10.0.0.1 netmask 255.255.255.0
sudo ifconfig tap1 10.0.0.2 netmask 255.255.255.0
ping -Itap0 10.0.0.2
tcpdump -Itap0 -n
tcpdump -Itap1 -n