#1 2023-01-17 12:11 pm

Bimmelbahn-Forum

Member

Registered: 2023-01-17

Posts: 1

Sperrung wegen IP-Adresse?

Hallo zusammen,
ist die Sperrung auf Basis einer IP-Adresse nicht gefährlich, da diese dynamisch vergeben werden? Ich hatte letztens einen Fall, wo ich einen Nutzer nach Rückfrage manuell zugelassen habe, der wegen seiner IP-Adresse gesperrt wurde. Habt ihr ähnliche Erfahrungen gemacht?

Viele Grüße,
Eckhard

SoftCreatR

Team

From: Germany

Registered: 2011-01-26

Posts: 57

Website

Re: Sperrung wegen IP-Adresse?

Man sollte nicht nur prüfen, ob eine IP in der Datenbank steht, sondern vor allem, wie oft. Und auch, ob beispielsweise die damit verbundene E-Mail-Adresse öfter auffällig war, usw. Es kommt zudem eher selten vor, dass IP-Adressen von Privatanschlüssen gemeldet werden.

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Alex Kemp

Moderator

From: Nottingham, England

Registered: 2009-12-02

Posts: 2,440

Website

Re: Sperrung wegen IP-Adresse?

EN:
In general:

• Use Email address as your principal means of blocking spammers via SFS

• An IP represents an ISP (“Internet Service Provider”)
  (the above is a gross simplification, but is often true)

  • Many ISPs provide WAN (“Wide Area Network”) access via dynamic IPs
    (in this case WAN == the Internet, or network of networks)
    (see OpenDNS or Wikipedia)

  • WAN access may be via a sticky dynamic IP
    (meaning that it is the same on every (or most) accesses)

  • If you pay extra your ISP may allocate you a static IP
    (it is the same on every WAN access)

  • Some ISPs have dedicated their service to spammers

Thus, only use IP and/or username as extra confirmation of whether an access is coming from a spammer, and never as the principle ID method. Email address can usually be used as the main or only method to ID a spammer.

As a little bit of technical info, 3 sections of the IPv4 address space are dedicated to be used on LANs (private networks), whereas the rest of that address space is used on WANs  or as multicast addresses:

• 10.0.0.0/8

• 172.16.0.0/12

• 192.168.0.0/16

That should mean (notice the careful use of language there) that you should never see a LAN IP used in the Internet.

There is also the IPv6 address space (“Here be Beasts”).

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Alex Kemp

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