1
I'm working on an InfoSec exercise, specifically email spoofing. I started by executing the following commands:
C:\Users\student>nslookup
6.0.0.10.in-addr.arpa
primary name server = localhost
responsible mail addr = nobody.invalid
serial = 1
refresh = 600 (10 mins)
retry = 1200 (20 mins)
expire = 604800 (7 days)
default TTL = 10800 (3 hours)
Default Server: UnKnown
Address: 10.0.0.6
> set type=mx
> gmail.com //the name of the mail domain of the victim
Server: UnKnown
Address: 10.0.0.6
Non-authoritative answer:
gmail.com MX preference = 20, mail exchanger = alt2.gmail-smtp-in.l.google
.com
gmail.com MX preference = 10, mail exchanger = alt1.gmail-smtp-in.l.google
.com
gmail.com MX preference = 40, mail exchanger = alt4.gmail-smtp-in.l.google
.com
gmail.com MX preference = 5, mail exchanger = gmail-smtp-in.l.google.com
gmail.com MX preference = 30, mail exchanger = alt3.gmail-smtp-in.l.google
.com
> exit
After these initial commands have been executed, I'm now gonna accessed telnet:
C:\Users\student>telnet alt1.gmail-smtp-in.l.google 25
Connecting To alt1.gmail-smtp-in.l.google...Could not open connection to the host,
on port 25: Connect failed
Can someone please tell me why I can't connect to port 25? Thanks!
4I'm voting to close this question as off-topic because this question was caused by a simple typographical error. – kenorb – 2017-10-23T09:45:23.813