sudo route del default gw 172.16.0.1 On Wed, Feb 23, 2011 at 12:08 PM, Richard Zulu <[email protected]> wrote:
> Hi, > > This is being done on a linux PC with three interfaces.* Ignore interface > eth0.* The linux PC connects to a switch that connects it to the rest of > my network.. *Eth1 and eth1:1* is are external facing interfaces with > public I.Ps. Eth3 is facing my internal network with a private I.P address. > > The *problem* is: When the internal interface (eth3) is up, I cannot reach > the rest of my public network from eth1:1 and cannot reach the internal > network too using eth3. > > However, with the internal interface down, eth3 in this case, I can reach > the rest of my network from both interfaces eth1 and eth1:1 > > How can I keep both my external interfaces and internal interface up and > still be able to reach the rest of the network (External network) and my > internal hosts (that use private I.Ps) too? > > > > The output of route -n > > Destination Gateway Genmask Flags Metric Ref Use > Iface > 196.43.133.64 0.0.0.0 255.255.255.192 U 0 0 > 0 eth1 > 192.168.2.0 0.0.0.0 255.255.255.0 U 0 > 0 0 eth0 > 172.16.0.0 0.0.0.0 255.255.0.0 U 0 > 0 0 eth3 > 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 > 0 0 eth0 > 0.0.0.0 172.16.0.1 0.0.0.0 UG 100 > 0 0 eth3 > 0.0.0.0 196.43.133.65 0.0.0.0 UG 100 > 0 0 eth1 > 0.0.0.0 192.168.2.1 0.0.0.0 UG 100 > 0 0 eth0 > > My Interfaces are configured as below: > > eth1 Link encap:Ethernet HWaddr 00:e0:81:2b:0a:c3 > inet addr:196.43.133.106 Bcast:196.43.133.127 > Mask:255.255.255.192 > inet6 addr: fe80::2e0:81ff:fe2b:ac3/64 Scope:Link > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:1354 errors:0 dropped:900846 overruns:0 frame:0 > TX packets:1254 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:1000 > RX bytes:137539 (137.5 KB) TX bytes:133686 (133.6 KB) > Interrupt:25 > > eth1:1 Link encap:Ethernet HWaddr 00:e0:81:2b:0a:c3 > inet addr:196.43.133.109 Bcast:196.43.133.127 > Mask:255.255.255.192 > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > Interrupt:25 > > eth3 Link encap:Ethernet HWaddr 00:04:23:08:91:dd > inet addr:172.16.0.10 Bcast:172.16.255.255 Mask:255.255.0.0 > inet6 addr: fe80::204:23ff:fe08:91dd/64 Scope:Link > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:12439091 errors:0 dropped:0 overruns:0 frame:0 > TX packets:629185 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:100 > RX bytes:1006167150 (1.0 GB) TX bytes:60553805 (60.5 MB) > > Is that clear enough? :) > > > > > > > On Tue, Feb 22, 2011 at 4:39 PM, Simon Vass <[email protected]> wrote: > >> Are you trying to build a firewall? Is this on a device or a PC? >> >> >> >> Simon Vass >> Managing Director >> E-Tech Uganda Ltd >> >> http://www.etech.ug >> Tel: +256 (0) 312260620 or (0) 312260621 >> email: [email protected] >> skype: e-techservicedesk >> >> >> ----- Original Message ----- >> From: "Richard Zulu" <[email protected]> >> To: "Uganda Linux User Group" <[email protected]> >> Sent: Tuesday, 22 February, 2011 1:19:37 PM >> Subject: [LUG] IP Routing Multiple interfaces >> >> >> Hi, >> >> Quick question: I have a linux box with three interfaces, two of them face >> my external network (one is a sub-interface) , with the same gateway address >> but obviously different I.Ps. Both are in the same public network / subnet >> >> One of the interfaces faces my internal network, private IP addresses. >> >> Problem: With all the interfaces up, I cannot reach any of the networks, >> both internal and external. >> >> However, with the internal network interface down, I can get to the >> external network. >> >> I need my internal interface up so that I can get to my internal network >> and at the same time get to the external networks. >> >> How can I pull it off? >> >> >> >> -- >> Richard Zulu >> gtug lead, Kampala (Uganda) >> http://kampala.gtugs.org >> >> >> >> _______________________________________________ >> The Uganda Linux User Group: http://linux.or.ug >> >> Send messages to this mailing list by addressing e-mails to: >> [email protected] >> Mailing list archives: http://www.mail-archive.com/[email protected]/ >> Mailing list settings: http://kym.net/mailman/listinfo/lug >> To unsubscribe: http://kym.net/mailman/options/lug >> >> The Uganda LUG mailing list is generously hosted by INFOCOM: >> http://www.infocom.co.ug/ >> >> The above comments and data are owned by whoever posted them (including >> attachments if any). The mailing list host is not responsible for them in >> any way. >> >> -- >> This message has been scanned for viruses and >> dangerous content by MailScanner, and is >> believed to be clean. >> >> _______________________________________________ >> The Uganda Linux User Group: http://linux.or.ug >> >> Send messages to this mailing list by addressing e-mails to: >> [email protected] >> Mailing list archives: http://www.mail-archive.com/[email protected]/ >> Mailing list settings: http://kym.net/mailman/listinfo/lug >> To unsubscribe: http://kym.net/mailman/options/lug >> >> The Uganda LUG mailing list is generously hosted by INFOCOM: >> http://www.infocom.co.ug/ >> >> The above comments and data are owned by whoever posted them (including >> attachments if any). The mailing list host is not responsible for them in >> any way. >> > > > > -- > Richard Zulu > gtug lead, Kampala (Uganda) > http://kampala.gtugs.org > > > > _______________________________________________ > The Uganda Linux User Group: http://linux.or.ug > > Send messages to this mailing list by addressing e-mails to: > [email protected] > Mailing list archives: http://www.mail-archive.com/[email protected]/ > Mailing list settings: http://kym.net/mailman/listinfo/lug > To unsubscribe: http://kym.net/mailman/options/lug > > The Uganda LUG mailing list is generously hosted by INFOCOM: > http://www.infocom.co.ug/ > > The above comments and data are owned by whoever posted them (including > attachments if any). The mailing list host is not responsible for them in > any way. >
_______________________________________________ The Uganda Linux User Group: http://linux.or.ug Send messages to this mailing list by addressing e-mails to: [email protected] Mailing list archives: http://www.mail-archive.com/[email protected]/ Mailing list settings: http://kym.net/mailman/listinfo/lug To unsubscribe: http://kym.net/mailman/options/lug The Uganda LUG mailing list is generously hosted by INFOCOM: http://www.infocom.co.ug/ The above comments and data are owned by whoever posted them (including attachments if any). The mailing list host is not responsible for them in any way.
