<html><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif;font-size:16px"><div id="yui_3_16_0_1_1420018451586_9845">Hi JoeJiang, <br></div><div><br></div><div id="yui_3_16_0_1_1420018451586_9846" dir="ltr">I tried pinging 8.8.8.8 net unreachable problem. <br></div><div id="yui_3_16_0_1_1420018451586_9847" dir="ltr">I am not sure as you pointed out my nameserver Moxie.corp is causing any issues. But on host machine nameserver is same but I am able to ping google, or is nat ing masquedre is not happening properly ?</div><div id="yui_3_16_0_1_1420018451586_9848" dir="ltr"><br></div><div id="yui_3_16_0_1_1420018451586_9849" dir="ltr">just confused at hte moment . <br></div><div dir="ltr"><br></div><div id="yui_3_16_0_1_1420018451586_9844"><span></span></div><div id="yui_3_16_0_1_1420018451586_9841"> </div><div id="yui_3_16_0_1_1420018451586_9851"><div id="yui_3_16_0_1_1420018451586_9850">
<br>Regards
<br>Neelu</div></div> <div class="qtdSeparateBR"><br><br></div><div style="display: block;" class="yahoo_quoted"> <div style="font-family: Helvetica Neue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif; font-size: 16px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif; font-size: 12px;"> <div dir="ltr"> <font face="Arial" size="2"> On Tuesday, 30 December 2014 8:23 PM, joejiang <ifzing@126.com> wrote:<br> </font> </div> <br><br> <div class="y_msg_container"><div id="yiv4436202387"><div><div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial;"><br clear="none"><div>Hi somshekar,</div><div>Maybe you can ping 8.8.8.8 or any other open dns ip to verify it<span style="line-height:1.7;">, or check your nameserver isn't correctly? </span></div><br clear="none"><br clear="none"><br clear="none"><div></div><div id="yiv4436202387divNeteaseMailCard"></div><br clear="none">At 2014-12-29 22:51:40, "somshekar kadam" <som_kadam@yahoo.co.in> wrote:<br clear="none"> <div class="yiv4436202387yqt2504123346" id="yiv4436202387yqt54430"><blockquote id="yiv4436202387isReplyContent" style="PADDING-LEFT:1ex;MARGIN:0px 0px 0px 0.8ex;BORDER-LEFT:#ccc 1px solid;"><div style="color:#000;background-color:#fff;font-family:Helvetica Neue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif;font-size:16px;"><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_2919"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096">Hello All, <br clear="none"></span></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_3747"><br clear="none"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096"></span></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_3748"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096">I have openstack instance able to ping compute/controller and other hosts in the network. <br clear="none"></span></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_3749"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096">Not able to ping google.com <br clear="none"></span></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_3750">My external network is 10.10.126.xx</div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_3751"><br clear="none"></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_3752">able to ping 10.10.126.1 gateway <br clear="none"></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_3753"><br clear="none"></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_3754">able to ping host controller 10.10.126.62 which also nova compute <br clear="none"></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_3755">able to ping other hosts 10.10.126.54 and other machines in network. <br clear="none"></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_3756">able to ping br100 and virbr0</div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_5047"><br clear="none"></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_5046">enabled /etc/sysctl.conf to contain the following:
net.ipv4.ip_forward=1</div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_6382">and also enabled masquerading in the iptables</div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_6383">iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE</div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_7195"><br clear="none"></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_3757">internal IP of instance is 10.4.128.2 and floating IP assigned is 10.10.126.129 <br clear="none"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096"></span></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_3758">On instance route command <br clear="none"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096"></span></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_3760"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096">[root@newtry fedora]# route -n<br class="yiv4436202387" style="" clear="none">Kernel IP routing table<br class="yiv4436202387" style="" clear="none">Destination Gateway Genmask Flags Metric Ref Use Iface<br class="yiv4436202387" style="" clear="none">0.0.0.0 10.4.128.3 0.0.0.0 UG 0 0 0 eth0<br class="yiv4436202387" style="" clear="none">10.4.128.0 0.0.0.0 255.255.240.0 U 0 0 0 eth0<br class="yiv4436202387" style="" clear="none">[root@newtry fedora]# <br class="yiv4436202387" style="" clear="none"></span></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_4359"><br clear="none"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096"></span></div><div dir="ltr"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096">on the controller machine <br clear="none"></span></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_4371"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096">stack@celestial-PC-1:~$ route -n<br class="yiv4436202387" style="" clear="none">Kernel IP routing table<br class="yiv4436202387" style="" clear="none">Destination Gateway Genmask Flags Metric Ref Use Iface<br class="yiv4436202387" style="" clear="none">0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 wlan0<br class="yiv4436202387" style="" clear="none">10.4.128.0 0.0.0.0 255.255.240.0 U 0 0 0 br100<br class="yiv4436202387" style="" clear="none">10.10.126.0 0.0.0.0 255.255.255.0 U 0 0 0 br100<br class="yiv4436202387" style="" clear="none">192.168.1.0 0.0.0.0 255.255.255.0 U 9 0 0 wlan0<br class="yiv4436202387" style="" clear="none">192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0<br class="yiv4436202387" style="" clear="none">stack@celestial-PC-1:~$ <br class="yiv4436202387" style="" clear="none"></span></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_7953"><br clear="none"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096"></span></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_7196"><br clear="none"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096"></span></div><div dir="ltr"><br clear="none"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096"></span></div><div dir="ltr"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096">on instance <br clear="none"></span></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_7949"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096">[root@newtry fedora]# ip addr<br class="yiv4436202387" style="" clear="none">1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default <br class="yiv4436202387" style="" clear="none"> link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00<br class="yiv4436202387" style="" clear="none"> inet 127.0.0.1/8 scope host lo<br class="yiv4436202387" style="" clear="none"> valid_lft forever preferred_lft forever<br class="yiv4436202387" style="" clear="none"> inet6 ::1/128 scope host <br class="yiv4436202387" style="" clear="none"> valid_lft forever preferred_lft forever<br class="yiv4436202387" style="" clear="none">2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000<br class="yiv4436202387" style="" clear="none"> link/ether fa:16:3e:20:e6:e5 brd ff:ff:ff:ff:ff:ff<br class="yiv4436202387" style="" clear="none"> inet 10.4.128.2/20 brd 10.4.143.255 scope global eth0<br class="yiv4436202387" style="" clear="none"> valid_lft forever preferred_lft forever<br class="yiv4436202387" style="" clear="none"> inet6 fe80::f816:3eff:fe20:e6e5/64 scope link <br class="yiv4436202387" style="" clear="none"> valid_lft forever preferred_lft forever<br class="yiv4436202387" style="" clear="none">[root@newtry fedora]# <br class="yiv4436202387" style="" clear="none"></span></div><div dir="ltr"><br clear="none"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096"></span></div><div dir="ltr"><span id="yiv4436202387yui_3_16_0_1_1419863931071_3096"></span></div><div id="yiv4436202387yui_3_16_0_1_1419863931071_2920"> </div><div id="yiv4436202387yui_3_16_0_1_1419863931071_2922"><div id="yiv4436202387yui_3_16_0_1_1419863931071_2921"><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_7950">what is missing not able to ping google.com from instance <br clear="none"></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_7951">please help on this with your valuable suggestions <br clear="none"></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_7954"><br clear="none"></div><div dir="ltr" id="yiv4436202387yui_3_16_0_1_1419863931071_7952">thanks in advance <br clear="none">
</div><div id="yiv4436202387yui_3_16_0_1_1419863931071_7955"><br clear="none"></div><div id="yiv4436202387yui_3_16_0_1_1419863931071_7956"><br clear="none"></div>Regards
<br clear="none">Neelu</div></div><div class="yiv4436202387y_msg_container" id="yiv4436202387yui_3_16_0_1_1419863931071_2944"><br clear="none"></div><div class="yiv4436202387qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv4436202387yahoo_quoted" id="yiv4436202387yui_3_16_0_1_1419863931071_2947" style="display:block;"><div id="yiv4436202387yui_3_16_0_1_1419863931071_2946" style="font-family:Helvetica Neue-Light, Helvetica Neue Light, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif;font-size:16px;"><div id="yiv4436202387yui_3_16_0_1_1419863931071_2945" style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, Sans-Serif;font-size:12px;"> </div> </div> </div> </div></blockquote></div></div><br clear="none"><br clear="none"><span title="neteasefooter"><span id="yiv4436202387netease_mail_footer"></span></span></div></div><br><br></div> </div> </div> </div> </div></body></html>