On the internal guest2 sles003:~ # netstat -nr Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 0.0.0.0 172.16.1.1 0.0.0.0 UG 0 0 0 eth0 10.6.0.0 0.0.0.0 255.255.255.0 U 0 0 0 hsi0 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 172.16.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
And on the router guest1 misvpn:~ # netstat -nr Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 199.44.167.0 0.0.0.0 255.255.255.128 U 0 0 0 eth0 10.6.0.0 0.0.0.0 255.255.255.0 U 0 0 0 hsi0 172.16.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 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 0.0.0.0 199.44.167.1 0.0.0.0 UG 0 0 0 eth0 I've never done a tcpdump before, something new to learn. :-) Mark On Thu, Jun 7, 2012 at 11:04 AM, Mauro Souza <[email protected]> wrote: > A couple tcpdumps could help know where your pings are getting killed. > You can run "tcpdump -i eth0 icmp" on your guest, on the gateway, and > on the external machine. > > A netstat -nr would help know if your routing table is pointing to the > wrong destination... > > Mauro > http://mauro.limeiratem.com - registered Linux User: 294521 > Scripture is both history, and a love letter from God. > > > 2012/6/7 Mark Pace <[email protected]>: > > Wasn't aware of that one. > > > > misvpn:~ # cat /proc/sys/net/ipv4/conf/all/rp_filter > > 1 > > > > misvpn:~ # echo 0 > /proc/sys/net/ipv4/conf/all/rp_filter > > misvpn:~ # cat /proc/sys/net/ipv4/conf/all/rp_filter > > 0 > > > > Stll unable to ping outward. > > > > On Thu, Jun 7, 2012 at 10:22 AM, Rob van der Heij <[email protected]> > wrote: > > > >> On Thu, Jun 7, 2012 at 4:10 PM, Mark Pace <[email protected]> > wrote: > >> > Within Guest2 - the router - Yes > >> > misvpn:~ # sudo cat /proc/sys/net/ipv4/ip_forward > >> > 1 > >> > > >> > >> There's also the conf/<if>/rp_filter that by default not to accept > >> traffic on the interface that you would not have sent that way > >> > >> Rob > >> > >> ---------------------------------------------------------------------- > >> For LINUX-390 subscribe / signoff / archive access instructions, > >> send email to [email protected] with the message: INFO LINUX-390 > or > >> visit > >> http://www.marist.edu/htbin/wlvindex?LINUX-390 > >> ---------------------------------------------------------------------- > >> For more information on Linux on System z, visit > >> http://wiki.linuxvm.org/ > >> > > > > > > > > -- > > The postings on this site are my own and don’t necessarily represent > > Mainline’s positions or opinions > > > > Mark D Pace > > Senior Systems Engineer > > Mainline Information Systems > > > > ---------------------------------------------------------------------- > > For LINUX-390 subscribe / signoff / archive access instructions, > > send email to [email protected] with the message: INFO LINUX-390 > or visit > > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > ---------------------------------------------------------------------- > > For more information on Linux on System z, visit > > http://wiki.linuxvm.org/ > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > -- The postings on this site are my own and don’t necessarily represent Mainline’s positions or opinions Mark D Pace Senior Systems Engineer Mainline Information Systems ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
