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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[lvs\-users\]\s+Real\s+server\s+not\s+responding\s+back\s*$/: 15 ]

Total 15 documents matching your query.

1. Re: [lvs-users] Real server not responding back (score: 1)
Author: Nick Wilson <vicnickw@xxxxxxxxx>
Date: Fri, 3 Apr 2020 12:14:01 +1100
Thanks for your notes. If you see traffic on tunl0 then the IPIP header is already My bad, I can see IPIP with a wider tcpdump filter. Flow is like: ens3: DIP -> RIP (proto IPIP) tunl0: CIP -> VIP en
/html/lvs-users/2020-04/msg00006.html (12,377 bytes)

2. Re: [lvs-users] Real server not responding back (score: 1)
Author: Julian Anastasov <ja@xxxxxx>
Date: Thu, 2 Apr 2020 18:06:04 +0300 (EEST)
Hello, If you see traffic on tunl0 then the IPIP header is already removed and you see CIP->VIP TCP packet. Before that, you should see IPIP DIP->RIP packet on the ens3 (input device). OK, kernel sen
/html/lvs-users/2020-04/msg00005.html (12,017 bytes)

3. Re: [lvs-users] Real server not responding back (score: 1)
Author: Nick Wilson <vicnickw@xxxxxxxxx>
Date: Fri, 3 Apr 2020 01:27:21 +1100
Hi Julian, Thanks a lot for sharing that how-to document. It was pretty clear and concise. I followed the document to setup LVS once again from scratch, but unfortunately it didn't resolve the respon
/html/lvs-users/2020-04/msg00004.html (11,328 bytes)

4. Re: [lvs-users] Real server not responding back (score: 1)
Author: Julian Anastasov <ja@xxxxxx>
Date: Thu, 2 Apr 2020 14:00:35 +0300 (EEST)
Hello, I have an old document for tunnel troubleshooting. I just added some configuration examples including recently supported tunnel modes, HTH: http://ja.ssi.bg/TUN-HOWTO.txt It works, as long as
/html/lvs-users/2020-04/msg00003.html (10,681 bytes)

5. Re: [lvs-users] Real server not responding back (score: 1)
Author: Nick Wilson <vicnickw@xxxxxxxxx>
Date: Thu, 2 Apr 2020 13:30:53 +1100
Thanks for explaining it Andrew. My guess is the same -- it's to do with cloud routing/networking, but the cloud hosting company says that their infrastructure and equipment have no restrictions in p
/html/lvs-users/2020-04/msg00002.html (12,875 bytes)

6. Re: [lvs-users] Real server not responding back (score: 1)
Author: Nick Wilson <vicnickw@xxxxxxxxx>
Date: Thu, 2 Apr 2020 13:20:55 +1100
Hi Graeme, traverse it and be seen departing the source (director) and and arriving at the target (realserver) inside the tunnel interfaces? To be honest, I don't know how to setup a tunnel without u
/html/lvs-users/2020-04/msg00001.html (12,071 bytes)

7. Re: [lvs-users] Real server not responding back (score: 1)
Author: Nick Wilson <vicnickw@xxxxxxxxx>
Date: Thu, 2 Apr 2020 13:09:07 +1100
Thanks Per. I tried rp_filter=2 but it made no difference. Cheers, Nick _______________________________________________ Please read the documentation before posting - it's available at: http://www.li
/html/lvs-users/2020-04/msg00000.html (10,163 bytes)

8. Re: [lvs-users] Real server not responding back (score: 1)
Author: Andrew Howe <andrew.howe@xxxxxxxxxxxxxxxx>
Date: Tue, 31 Mar 2020 12:19:07 +0100
Hi Nick, Being in the cloud changes things. Not having access to the underlying infrastructure, to make configuration changes and perform troubleshooting, may make using LVS/TUN impossible. Whatever
/html/lvs-users/2020-03/msg00019.html (11,353 bytes)

9. Re: [lvs-users] Real server not responding back (score: 1)
Author: Graeme Fowler <graeme@xxxxxxxxxxx>
Date: Tue, 31 Mar 2020 12:16:46 +0100
A couple of things spring immediately to mind: 1. If you setup a tunnel without using LVS, can you get traffic to traverse it and be seen departing the source (director) and and arriving at the targe
/html/lvs-users/2020-03/msg00018.html (10,523 bytes)

10. Re: [lvs-users] Real server not responding back (score: 1)
Author: Per Jessen <per@xxxxxxxxxxxx>
Date: Tue, 31 Mar 2020 12:07:14 +0200
On my real servers, rp_filter=2 for my two IPIP interfaces. Verbatim from the setup script: sysctl -w net.ipv4.conf.ipip0.rp_filter=2 sysctl -w net.ipv4.conf.ipip1.rp_filter=2 -- Per Jessen, Zürich (
/html/lvs-users/2020-03/msg00017.html (9,434 bytes)

11. Re: [lvs-users] Real server not responding back (score: 1)
Author: Nick Wilson <vicnickw@xxxxxxxxx>
Date: Tue, 31 Mar 2020 18:47:44 +1100
Thanks for your reply Andrew. There's no firewall in-front of the real server, while I'm testing LVS. There should be router I'm guessing. As this a cloud hosted VM, I checked with the hosting compan
/html/lvs-users/2020-03/msg00016.html (11,203 bytes)

12. Re: [lvs-users] Real server not responding back (score: 1)
Author: Nick Wilson <vicnickw@xxxxxxxxx>
Date: Tue, 31 Mar 2020 18:31:27 +1100
Thanks for your reply, Per. Wait - you say "hitting the real server, and the real server responding By 'web server' I meant the python web server software running on the real server. It doesn't inter
/html/lvs-users/2020-03/msg00015.html (10,016 bytes)

13. Re: [lvs-users] Real server not responding back (score: 1)
Author: Andrew Howe <andrew.howe@xxxxxxxxxxxxxxxx>
Date: Mon, 30 Mar 2020 19:37:44 +0100
Hi Nick, It sounds like the server's responses aren't making it through, meaning that a TCP three-way handshake cannot be completed. What is sitting in front of the real server, and *is it stateful*?
/html/lvs-users/2020-03/msg00014.html (10,153 bytes)

14. Re: [lvs-users] Real server not responding back (score: 1)
Author: Per Jessen <per@xxxxxxxxxxxx>
Date: Mon, 30 Mar 2020 11:22:27 +0200
FWIW, I have had an LVS on IPIP tunneling setup running for 14-15 years, currently with some 80 backends, also spread across multiple datacentres. Wait - you say "hitting the real server, and the rea
/html/lvs-users/2020-03/msg00013.html (12,072 bytes)

15. [lvs-users] Real server not responding back (score: 1)
Author: Nick Wilson <vicnickw@xxxxxxxxx>
Date: Thu, 26 Mar 2020 02:03:23 +1100
Hi, I'm trying to get LVS/IPVS to work for my desired configuration, but facing a weird problem, most likely due to a simple mistake somewhere. For now, I've created one load balancer VM (running Ubu
/html/lvs-users/2020-03/msg00012.html (9,551 bytes)


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