Re: [swinog] Swisscom IPv6 Routing weirdness
> On 20210225, at 16:52, Jean-Pierre Schwickerath wrote: > > Hi Jeroen >> that "sinkhole" is just a misconfigured/internet-ignorant "load >> balancer": those things do not care about ICMP... >> >> you are thus reaching the dest, it is just misconfigured: the Internet >> is just HTTP for many, they do not care about this TCP, ICMP or IP >> thing... be happy there is some kind of IPv6... >> > I wouldn't have noticed the issue if the loadbalancer / webserver had > actually returned a webpage on port TCP/443. But it doesn't. So I tried > from a different network to see if the issue is reproducible and that > when I noticed the path taken by the traceroute packets. > Check with a tcpdump, don't forget to include ICMP. Could also be an MTU issue or something on your side killing it. Of course the behavior of the "load balancer" says quite a few things... sbb.ch is like that too... >> >> Btw, when complaining about something, it is wise to include IP >> addresses, especially for the source... >> > The first hop of the traceroute is actually a good indicator for the > source. 192.168.205.240 ? DNS is ambiguous and reverses do not always match forwards. Including the actual IPs can thus be very useful... That is, if you actually want it resolved. You might want contact swisscom directly (good luck with that) or at least your ISPs that provide the connectivity, they might have better chance at contacting them. (taking transit over swissix is a fun one; but yea it is not that swisscom likes to peer, what else would a monopoly do) Greets, Jeroen ___ swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
Re: [swinog] Swisscom IPv6 Routing weirdness
On 2021-02-25 15:45, Jean-Pierre Schwickerath wrote: Dear Swisscom Routing-Experts Are you not peeing at swissIX anymore? Your webserver www.swisscom.ch (2a02:a90:c400:4001::2) gives me a hard time to be reached. Either it wants it traffic to be routed from Berne via NL, UK, US and ends in a sinkhole or it uses what looks like using private peering from tineo/netrics/finecom to the same sinkhole: that "sinkhole" is just a misconfigured/internet-ignorant "load balancer": those things do not care about ICMP... you are thus reaching the dest, it is just misconfigured: the Internet is just HTTP for many, they do not care about this TCP, ICMP or IP thing... be happy there is some kind of IPv6... Btw, when complaining about something, it is wise to include IP addresses, especially for the source... Greets, Jeroen ___ swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
[swinog] Swisscom IPv6 Routing weirdness
Dear Swisscom Routing-Experts Are you not peeing at swissIX anymore? Your webserver www.swisscom.ch (2a02:a90:c400:4001::2) gives me a hard time to be reached. Either it wants it traffic to be routed from Berne via NL, UK, US and ends in a sinkhole or it uses what looks like using private peering from tineo/netrics/finecom to the same sinkhole: tracepath6 2a02:a90:c400:4001::2 1?: [LOCALHOST] 0.367ms pmtu 1500 1: sv96.hilotec.net 0.776ms 1: sv96.hilotec.net 0.740ms 2: 2a00:c38::1:0:2a 1.538ms 3: lo0.01.p.cbn.ch.as15576.nts.ch 1.725ms 4: lo0.01.p.czh.ch.as15576.nts.ch 4.075ms 5: lo0.02.p.czh.ch.as15576.nts.ch 4.354ms 6: zayog.swissix.ch 10.184ms 7: no reply 8: ae2.cs1.ams17.nl.eth.zayo.com 151.857ms asymm 25 9: no reply 10: no reply 11: no reply 12: ae5.cs1.lhr11.uk.eth.zayo.com 153.354ms asymm 21 13: no reply 14: 2001:438:::407d:1d13 151.202ms asymm 19 15: ae6.cs1.sjc2.us.eth.zayo.com 159.227ms asymm 18 16: ae9.mpr1.pao1.us.zip.zayo.com 152.345ms 17: 2001:438:fffe::2456 153.873ms asymm 10 18: 2001:c10:80:1::e51 259.737ms asymm 10 19: 2001:c10:80:1::b96 265.511ms asymm 11 20: 2001:c10:80:2::ad2 243.109ms asymm 10 21: geb-030-lo0-0.ip6.ip-plus.net 247.019ms asymm 9 22: geb-015-loo6.ip6.ip-plus.net 236.957ms asymm 8 23: gem-005-loo6.ip6.ip-plus.net 242.943ms asymm 8 24: 2001:918:100:63::1 230.491ms asymm 7 25: 2001:918:100:4c::1 240.121ms asymm 8 26: 2001:918:100:52::1 247.741ms asymm 7 27: 2001:918:ce::49 241.013ms asymm 8 28: 2a02:a90:4024:fff::14 247.804ms asymm 9 29: 2a02:a90:4024:fff::15 234.473ms asymm 8 30: no reply Too many hops: pmtu 1500 Resume: pmtu 1500 tracepath 2a02:a90:c400:4001::2 1?: [LOCALHOST] 0.030ms pmtu 1500 1: router.3550.ch 0.418ms 1: router.3550.ch 0.410ms 2: bd4.lar01.lna001.bb.fcom.ch 4.561ms 3: no reply 4: no reply 5: 2001:4d98:a000::1b4 3.218ms asymm 4 6: zhh-015-lo0-0.ip6.ip-plus.net 11.088ms asymm 5 7: 2001:918:ce::45 6.146ms asymm 6 8: 2a02:a90:4024:fff:8000::15 5.452ms 9: no reply 10: no reply 11: no reply 12: no reply 13: no reply 14: no reply 15: no reply 16: no reply 17: no reply 18: no reply 19: no reply 20: no reply 21: no reply 22: no reply 23: no reply 24: no reply 25: no reply 26: no reply 27: no reply 28: no reply 29: no reply 30: no reply Too many hops: pmtu 1500 Resume: pmtu 1500 Is that a management decision or a technical issue? Cheers Jean-Pierre -- HILOTEC Engineering + Consulting AG - Langnau im Emmental IT für KMUs: Netzwerke, Server, PCs, Linux, Telefonanlagen, VOIP, Hosting, Datenbanken, Entwicklung, WLAN, Cloud, Firewalls Tel: +41 34 408 01 00 - https://www.hilotec.com/ ___ swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
[swinog] Bluewin / Swisscom Postmaster Contact
Hi all We (Hostpoint) see increasing problems sending automated Mails to bluewwin recipients (such as account confirmation emails). Respectively we see them identiefd as spam mails. Can a Swisscom/Bluewin Postmaster please get in touch with me/us to identify the cause? Thanks, Michael Naef Head of System Engineering, Hostpoint AG ___ swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
