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Secure Shell (SSH) filtering

jacqieklein
Member

Hello, all!

I'm writing because it appears that Mediacom blocks SSH access (tcp port 22) both inbound and outbound. I have various shell accounts - none of which can be accessed from my home internet connection. Below, you'll find the output from the tcptraceroute(1) utility installed on the computer wired directly to the cable-modem (CM).

[3] (root@softfw1) ~$ tcptraceroute -m 5 sdf.org 22
Selected device eno1, address 192.168.0.2, port 40513 for outgoing packets
Tracing the path to sdf.org (205.166.94.16) on TCP port 22 (ssh), 5 hops max
1 192.168.0.1 1.285 ms 1.202 ms 1.202 ms
2 * * *
3 * * *
4 * * *
5 * * *
Destination not reached
[3] (root@softfw1) ~$ tcptraceroute -m 5 sdf.org 80
Selected device eno1, address 192.168.0.2, port 49479 for outgoing packets
Tracing the path to sdf.org (205.166.94.16) on TCP port 80 (http), 5 hops max
1 192.168.0.1 1.281 ms 1.202 ms 1.196 ms
2 10.152.65.1 10.589 ms 9.693 ms 9.997 ms
3 172.30.5.53 10.918 ms 10.639 ms 10.386 ms
4 10.16.80.235 17.264 ms 15.255 ms 15.023 ms
5 10.16.80.93 15.493 ms 14.959 ms 15.259 ms
Destination not reached

Can someone from Mediacom please weigh in on this? We're paying for the 1Gbps Internet package - what more must we do to get /unfiltered/ Internet access?

2 REPLIES 2

MediacomTom
Moderator
Moderator

Hello jacqieklein. Thanks for reaching out. The Mediacom network does not intentionally or knowingly block any ports outside of port 25 for security/spam reasons. Although we do not block SSH or VPN's from being used, we do not actively support them and apologize for any inconvenience this may cause.

Moderator,

Please review the configuration on device 10.152.65.1. This is the second hop upstream from me; it's the hop at which my SSH connection attempts are being dropped while HTTP connections are passed.