* Weird networking problem
[not found] <2075397403.74263.1355849057712.JavaMail.root@yetopen.it>
@ 2012-12-18 16:45 ` Lorenzo Milesi
2012-12-19 11:57 ` Stefan Hajnoczi
0 siblings, 1 reply; 2+ messages in thread
From: Lorenzo Milesi @ 2012-12-18 16:45 UTC (permalink / raw)
To: kvm
Hi.
I'm experiencing weird network problems on a KVM installation.
OS is Ubuntu 12.04, qemu 1.0+noroms-0ubuntu14.3, kernel 3.2.0-34-generic.
eth0 is attached to LAN -> br0
eth2 is attached to WAN -> br1
Debian config follows:
auto eth0
iface eth0 inet manual
auto br0
iface br0 inet static
address 192.168.1.47
netmask 255.255.255.0
gateway 192.168.1.1
dns-nameservers 192.168.1.1 8.8.8.8
bridge_ports eth0
bridge_stp off
bridge_fd 0
bridge_maxwait 0
auto eth2
iface eth2 inet manual
auto br1
iface br1 inet manual
bridge_ports eth2
bridge_stp off
bridge_fd 0
bridge_maxwait 0
I've configured a single guest to work a firewall (pfsense). Using version 2.1 beta which supports virtualized drivers.
XML config [1].
Problem: I've configured a VPN to another network (network B).
>From Network B, I can ping & ssh to 192.168.1.49 (another physical host on the lan), but I can only ping my kvm physical host, all TCP connection (ssh) gets lost.
I have similar problem with port forward, while I can ssh to .49 I cannot to .47.
I managed to catch a tcpdump while trying to ssh to .47:
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on vtnet0, link-type EN10MB (Ethernet), capture size 96 bytes
12:18:21.720364 IP my.host.com.34242 > 192.168.1.47.ssh: Flags [S], seq 2689263164, win 14600, options [mss 1412,sackOK,TS val 2912170 ecr 0,nop,wscale 7], length 0
12:18:21.720760 IP 192.168.1.47.ssh > my.host.com.34242: Flags [S.], seq 1214622068, ack 2689263165, win 14480, options [mss 1460,sackOK,TS val 127905521 ecr 2912170,nop,wscale 7], length 0
12:18:22.718447 IP my.host.com.34242 > 192.168.1.47.ssh: Flags [S], seq 2689263164, win 14600, options [mss 1412,sackOK,TS val 2912420 ecr 0,nop,wscale 7], length 0
12:18:22.718814 IP 192.168.1.47.ssh > my.host.com.34242: Flags [S.], seq 1214622068, ack 2689263165, win 14480, options [mss 1460,sackOK,TS val 127905770 ecr 2912170,nop,wscale 7], length 0
12:18:22.923054 IP 192.168.1.47.ssh > my.host.com.34242: Flags [S.], seq 1214622068, ack 2689263165, win 14480, options [mss 1460,sackOK,TS val 127905821 ecr 2912170,nop,wscale 7], length 0
12:18:24.723703 IP my.host.com.34242 > 192.168.1.47.ssh: Flags [S], seq 2689263164, win 14600, options [mss 1412,sackOK,TS val 2912921 ecr 0,nop,wscale 7], length 0
12:18:24.724103 IP 192.168.1.47.ssh > my.host.com.34242: Flags [S.], seq 1214622068, ack 2689263165, win 14480, options [mss 1460,sackOK,TS val 127906272 ecr 2912170,nop,wscale 7], length 0
12:18:24.935085 IP 192.168.1.47.ssh > my.host.com.34242: Flags [S.], seq 1214622068, ack 2689263165, win 14480, options [mss 1460,sackOK,TS val 127906325 ecr 2912170,nop,wscale 7], length 0
12:18:28.734360 IP my.host.com.34242 > 192.168.1.47.ssh: Flags [S], seq 2689263164, win 14600, options [mss 1412,sackOK,TS val 2913924 ecr 0,nop,wscale 7], length 0
12:18:28.734737 IP 192.168.1.47.ssh > my.host.com.34242: Flags [S.], seq 1214622068, ack 2689263165, win 14480, options [mss 1460,sackOK,TS val 127907274 ecr 2912170,nop,wscale 7], length 0
12:18:28.947166 IP 192.168.1.47.ssh > my.host.com.34242: Flags [S.], seq 1214622068, ack 2689263165, win 14480, options [mss 1460,sackOK,TS val 127907328 ecr 2912170,nop,wscale 7], length 0
12:18:36.751056 IP my.host.com.34242 > 192.168.1.47.ssh: Flags [S], seq 2689263164, win 14600, options [mss 1412,sackOK,TS val 2915928 ecr 0,nop,wscale 7], length 0
12:18:36.751477 IP 192.168.1.47.ssh > my.host.com.34242: Flags [S.], seq 1214622068, ack 2689263165, win 14480, options [mss 1460,sackOK,TS val 127909279 ecr 2912170,nop,wscale 7], length 0
12:18:36.975114 IP 192.168.1.47.ssh > my.host.com.34242: Flags [S.], seq 1214622068, ack 2689263165, win 14480, options [mss 1460,sackOK,TS val 127909335 ecr 2912170,nop,wscale 7], length 0
I know it's not an issue with the firewall, because I've tried another distro and I had other kind of issue, always network related.
Any idea?
thanks!
P.S. please reply all as I'm not subscribed
[1]
<domain type='qemu' id='5'>
<name>pfsense</name>
<uuid>36d77162-3e9c-5317-d011-9b61a9bfb887</uuid>
<memory>1548288</memory>
<currentMemory>1548288</currentMemory>
<vcpu>1</vcpu>
<os>
<type arch='x86_64' machine='pc-1.0'>hvm</type>
<boot dev='hd'/>
<bootmenu enable='no'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/bin/qemu-system-x86_64</emulator>
<disk type='block' device='disk'>
<driver name='qemu' type='raw'/>
<source dev='/dev/depsrv01lv/pfsense'/>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</disk>
<disk type='block' device='cdrom'>
<driver name='qemu' type='raw'/>
<target dev='hdc' bus='ide'/>
<readonly/>
<alias name='ide0-1-0'/>
<address type='drive' controller='0' bus='1' unit='0'/>
</disk>
<controller type='ide' index='0'>
<alias name='ide0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:7e:03:aa'/>
<source bridge='br0'/>
<target dev='vnet0'/>
<model type='virtio'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</interface>
<interface type='bridge'>
<mac address='52:54:00:08:e5:84'/>
<source bridge='br1'/>
<target dev='vnet1'/>
<model type='virtio'/>
<alias name='net1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/2'/>
<target port='0'/>
<alias name='serial0'/>
</serial>
<console type='pty' tty='/dev/pts/2'>
<source path='/dev/pts/2'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
</console>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='5900' autoport='yes'/>
<video>
<model type='cirrus' vram='9216' heads='1'/>
<alias name='video0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</video>
<memballoon model='virtio'>
<alias name='balloon0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</memballoon>
</devices>
<seclabel type='dynamic' model='apparmor' relabel='yes'>
<label>libvirt-36d77162-3e9c-5317-d011-9b61a9bfb887</label>
<imagelabel>libvirt-36d77162-3e9c-5317-d011-9b61a9bfb887</imagelabel>
</seclabel>
</domain>
--
Lorenzo Milesi - lorenzo.milesi@yetopen.it
GPG/PGP Key-Id: 0xE704E230 - http://keyserver.linux.it
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