We want to analyse different network graphs from service providers in a Bachelor Thesis. Would anyone be willing to share the topology? Of course, the data can be anonymised. The students will need to find typical characteristics of service provider networks, and the thesis aims to create new topologies with these characteristics.
Attached you can find the own-developed prototype helping to analyse the graph characteristics.
Network and Research Engineer
P central +41 58 257 44 99
P direct +41 58 257 44 84
OST – Eastern Switzerland University of Applied Sciences
INS – Institute for Network and Security | Oberseestrasse 10 | 8640 Rapperswil | Switzerland | http://www.ost.ch
Dear Swinog list
Allow me to remind you for the Domainpulse 2023 on February 6. & 7. In Witherthur.
The event is organised by the 3 registries SWITCH (.ch/li), Denic (.at) and nic.at <http://nic.at/> (.at) and focuses on Domain Names.
Most of the talks are also interesting for network operators, like the talk from Geoff Houston on measurements or the discussion about fiber ins Switzerland and Liechtenstein.
Participation is free and you can register here:
Hope to see you in Winterthur
Michael Hausding, Competence Lead DNS & Domain Abuse
Werdstrasse 2, P.O. Box, 8021 Zurich, Switzerland
phone +41 44 268 15 77, incident phone +41 44 268 15 40
Fancy another DNS issue hunt?
We have DNSSEC validation enabled on our BIND DNS Servers.
We started seeing:
no valid RRSIG resolving 'www.numberportability.ch/DS/IN': 2a01:8100:2901::1:183:202#53
no valid RRSIG resolving 'www.numberportability.ch/DS/IN': 2a01:8100:2901::1:183:201#53
no valid RRSIG resolving 'www.numberportability.ch/DS/IN': 220.127.116.11#53
no valid RRSIG resolving 'www.numberportability.ch/DS/IN': 18.104.22.168#53
broken trust chain resolving 'www.numberportability.ch/HTTPS/IN': 2a01:8100:2901::1:183:202#53
broken trust chain resolving 'www.numberportability.ch/AAAA/IN': 2a01:8100:2901::1:183:202#53
client @0x803541d60 X.X.X.X#27325 (www.numberportability.ch): query failed (broken trust chain) for www.numberportability.ch/IN/AAAA at query.c:7724
And of course the query fails, disrupting access some some quite
numberportability.ch. 900 IN SOA dns1.swizzonic.ch. hostmaster.swizzonic.ch. 2022121601 10800 3600 604800 86400
$ dig +dnssec RRSIG www.numberportability.ch @dns1.swizzonic.ch
; <<>> DiG 9.16.33-Debian <<>> +dnssec RRSIG www.numberportability.ch @dns1.swizzonic.ch
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 39132
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available
So, from my point of view, the authoritative DNS server thinks, this is
a recursive query and refuses to answer with the RRSIG, breaking
validation of that record.
Do you get to the same conclusion? Can you resolve this host via any
other DNSSEC validating nameserver?
I had no success contacting any technical inclined staff willing to
look at the issue since the issue started on 16. December via
hostmaster(a)swizzonic.ch by phone or via support(a)register.it. So if
anyone from Swizzonic is reading here, it would be nice to get a direct
contact to further investigate that issue.
Mit freundlichen Grüssen
I m p r o W a r e A G - Leiter Commerce Kunden
Zurlindenstrasse 29 Tel +41 61 826 93 00
CH-4133 Pratteln Fax +41 61 826 93 01
Schweiz Web http://www.imp.ch
Does someone know a way to reach Swizzonic outside their working hours?
A Domain of us got deactivated in the evening outside their working hours, event though the bill is paid and wouldn't be due yet.
Said domain is used for our dns servers we use for customer...