= Сообщение: 6806 из 7402 ============================================= IPV6 = От : Alexey Vissarionov 2:5020/545 10 Oct 21 11:36:36 Кому : Andrew Leary 10 Oct 21 11:36:36 Тема : New one FGHI : area://IPV6?msgid=2:5020/545+6162adb9 На : area://IPV6?msgid=1:320/219@fidonet+61627be7 = Кодировка сообщения определена как: CP866 ================================== ============================================================================== Good ${greeting_time}, Andrew!
10 Oct 2021 01:17:34, you wrote to Brian Rogers:
BR>> I have Comcast as well, however they filter the same ports on IPv6 BR>> as they do on IPv4 such as 25, 80, etc. I see you're running under BR>> the Comcast native IPv6 - did they open the ports for you or are you BR>> lucky and they just haven't hit your block yet? I ended up using BR>> HE.net with a 6 to 4 tunnel which bypasses the Comcast blocks. AL> The filter on port 25 is easy to work around, and prevents a lot of AL> spam entering the internet.
Properly configured mail servers do accept incoming messages only from other servers (they act in completely different manner than hijacked hosts) or from authenticated users (having a certificate or at least an username+password).
AL> They do not filter port 80 for me.
Having 80/tcp filtered out is not a big problem: you always have an option to use HTTPS instead of plain HTTP (issuing a self-signed certificate is trivial, and the encryption overhead is minimal; however, SSL/TLS is unsafe).
The reanon for ISPs to filter out incoming (to user) HTTP and outgoing (from user) SMTP is trivial: first is used to access improperly configured routers, and second is used to send spam - both increasing the load on the abuse desk.
