[root@test /]# ping google.com
ping: unknown host google.com

 tracert 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 40 byte packets
 1  * * *
 2  * * *
 3  * * *
 4  * * *

[root@test /]# ip route list table all
192.0.2.0/24 dev venet0  scope host
169.254.0.0/16 dev venet0  scope link
default dev venet0  scope link
broadcast 127.255.255.255 dev lo  table 255  proto kernel  scope link  src 127.0.0.1
local 67.227.246.10 dev venet0  table 255  proto kernel  scope host  src 67.227.246.10
broadcast 67.227.246.10 dev venet0  table 255  proto kernel  scope link  src 67.227.246.10
broadcast 127.0.0.0 dev lo  table 255  proto kernel  scope link  src 127.0.0.1
local 127.0.0.1 dev lo  table 255  proto kernel  scope host  src 127.0.0.1
local 127.0.0.1 dev venet0  table 255  proto kernel  scope host  src 127.0.0.1
local 127.0.0.0/8 dev lo  table 255  proto kernel  scope host  src 127.0.0.1

[root@cloud2 ~]# tcpdump -i venet0 -e host 8.8.8.8
tcpdump: WARNING: arptype 65535 not supported by libpcap - falling back to cooke                               d socket
tcpdump: WARNING: venet0: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on venet0, link-type LINUX_SLL (Linux cooked), capture size 96 bytes
12:34:41.436241  In ethertype IPv4 (0x0800), length 100: 67.227.246.10 > google-public-dns-a.google.com: ICMP echo request, id 55301, seq 1, length 64
12:34:42.435563  In ethertype IPv4 (0x0800), length 100: 67.227.246.10 > google-public-dns-a.google.com: ICMP echo request, id 55301, seq 2, length 64
12:34:43.435571  In ethertype IPv4 (0x0800), length 100: 67.227.246.10 > google-public-dns-a.google.com: ICMP echo request, id 55301, seq 3, length 64
12:34:44.435581  In ethertype IPv4 (0x0800), length 100: 67.227.246.10 > google-public-dns-a.google.com: ICMP echo request, id 55301, seq 4, length 64
12:34:45.435590  In ethertype IPv4 (0x0800), length 100: 67.227.246.10 > google-public-dns-a.google.com: ICMP echo request, id 55301, seq 5, length 64
12:34:46.435599  In ethertype IPv4 (0x0800), length 100: 67.227.246.10 > google-public-dns-a.google.com: ICMP echo request, id 55301, seq 6, length 64

cat /etc/sysctl.conf
# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled. See sysctl(Cool and
# sysctl.conf(5) for more details.

# Controls IP packet forwarding
net.ipv4.ip_forward = 1

net.ipv4.conf.default.proxy_arp = 0

# Controls source route verification
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.all.rp_filter = 1

# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0

# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 1

# Controls whether core dumps will append the PID to the core filename
# Useful for debugging multi-threaded applications
kernel.core_uses_pid = 1

# Controls the use of TCP syncookies
net.ipv4.tcp_syncookies = 1

# Controls the maximum size of a message, in bytes
kernel.msgmnb = 65536

# Controls the default maxmimum size of a mesage queue
kernel.msgmax = 65536

# Controls the maximum shared segment size, in bytes
kernel.shmmax = 4294967295

# Controls the maximum number of shared memory segments, in pages
kernel.shmall = 268435456

# We do not want all our interfaces to send redirects
net.ipv4.conf.default.send_redirects = 1
net.ipv4.conf.all.send_redirects = 0

[root@test /]# cat /etc/resolv.conf
nameserver 8.8.8.8
nameserver 8.8.4.4

[root@cloud2 ~]# service iptables restart
Flushing firewall rules:                                   [  OK  ]
Setting chains to policy ACCEPT: filter                    [  OK  ]
Unloading iptables modules:                                [  OK  ]
Applying iptables firewall rules:                          [  OK  ]
Loading additional iptables modules: ipt_REJECT ipt_tos ipt_TOS ipt_LOG ip_conntrack ipt_limit ipt_multiport iptable_filter iptable_mangle ipt_TCPMSS ipt_tcpmss ipt_ttl ipt_length ipt_state iptable_nat ip_nat_ftp ipt_owner ipt_REDIRECT ip_conntrack_ftp                             [  OK  ]
[root@cloud2 ~]# service network restart
Shutting down interface eth0:                              [  OK  ]
Shutting down loopback interface:                          [  OK  ]
Disabling IPv4 packet forwarding:  net.ipv4.ip_forward = 0
                                                           [  OK  ]
Bringing up loopback interface:                            [  OK  ]
Bringing up interface eth0:                                [  OK  ]
Bringing up interface venet0:  Bringing up interface venet0:
Configuring interface venet0:
net.ipv4.conf.venet0.send_redirects = 0
                                                           [  OK  ]