DNS-Server der Telekom extrem langsam und mit kurzer Cache-Haltezeit

3 years ago

Hallo Support,

 

mein V-DSL-100-Anschluss bekommt von euch folgende DNS-Server zugewiesen:

 

nameserver 217.237.151.205
nameserver 217.237.148.70

 

Beide Server benötigen für jede neue Hostabfrage 3 bis 4 Sekunden. Das Ergebnis bleibt auch nur für wenige Minuten im Cache , dann dauert es wieder so lange. Beispiele:

 

leela:~ # time nslookup www2.shopdriver.de 217.237.151.205
Server: 217.237.151.205
Address: 217.237.151.205#53

Non-authoritative answer:
Name: www2.shopdriver.de
Address: 146.0.237.226


real 0m3.056s
user 0m0.000s
sys 0m0.006s

leela:~ # time nslookup www2.shopdriver.de 217.237.148.70
Server: 217.237.148.70
Address: 217.237.148.70#53

Non-authoritative answer:
Name: www2.shopdriver.de
Address: 146.0.237.226


real 0m3.051s
user 0m0.005s
sys 0m0.002s

 

Zum Vergleich hier die Abfragen über den Public DNS von Google:

 

leela:~ # time nslookup www2.shopdriver.de 8.8.8.8
Server: 8.8.8.8
Address: 8.8.8.8#53

Non-authoritative answer:
Name: www2.shopdriver.de
Address: 146.0.237.226


real 0m0.051s
user 0m0.000s
sys 0m0.006s


leela:~ # time nslookup www2.shopdriver.de 8.8.4.4
Server: 8.8.4.4
Address: 8.8.4.4#53

Non-authoritative answer:
Name: www2.shopdriver.de
Address: 146.0.237.226


real 0m0.048s
user 0m0.006s
sys 0m0.000s

 

Es liegt nicht an der Verbindung:

 

leela:~ # mtr -r 217.237.151.205
Start: 2022-02-01T16:57:41+0100
HOST: leela.expeedo.de Loss% Snt Last Avg Best Wrst StDev
1.|-- 192.168.2.1 0.0% 10 1.0 1.0 0.8 1.6 0.2
2.|-- p3e9bf413.dip0.t-ipconnec 0.0% 10 8.0 10.4 7.8 22.5 5.0
3.|-- do-ec4-i.DO.DE.NET. DTAG .D 0.0% 10 10.7 9.7 8.6 14.8 1.9
4.|-- do-ec4-i.DO.DE.NET. DTAG .D 0.0% 10 8.4 8.6 8.4 9.0 0.2
5.|-- pd9002772.dip0.t-ipconnec 0.0% 10 8.7 8.8 8.6 9.0 0.2
6.|-- do-lb-a01.isp.t-ipnet.de 0.0% 10 8.7 8.7 8.6 9.1 0.1

leela:~ # mtr -r 217.237.148.70
Start: 2022-02-01T16:58:18+0100
HOST: leela.expeedo.de Loss% Snt Last Avg Best Wrst StDev
1.|-- 192.168.2.1 0.0% 10 0.2 0.6 0.2 0.9 0.3
2.|-- p3e9bf413.dip0.t-ipconnec 0.0% 10 7.7 8.0 7.7 8.5 0.2
3.|-- d-eb6-i.D.DE.NET. DTAG .DE 0.0% 10 9.8 12.7 9.8 32.7 7.1
4.|-- pd9002712.dip0.t-ipconnec 0.0% 10 10.5 10.8 10.4 12.5 0.6
5.|-- d-lb-a01.isp.t-ipnet.de 0.0% 10 9.5 9.7 9.5 10.1 0.2

 

Mit besten Grüßen

Michael Balzer

 

11386

0

7

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