137
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
this post was submitted on 20 Apr 2024
137 points (98.6% liked)
Selfhosted
62293 readers
343 users here now
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
Rules:
-
Be civil.
-
No spam.
-
Posts are to be related to self-hosting.
-
Don't duplicate the full text of your blog or readme if you're providing a link.
-
Submission headline should match the article title.
-
No trolling.
-
Promotion posts require active participation, with an account that is at least 30 days old. F/LOSS without a paywall has exceptions, with requirements. See the rules link for details. Tags [CBH] or [AIP] are required, see the links in Rule 8 for details.
-
AI-related discussions and AI-involved promotional posts have additional requirements for tagging, as noted in Rule 7 and the AI & Promotional Post Expanded Rules post, and find example disclosures here.
Resources:
- selfh.st Newsletter and index of selfhosted software and apps
- awesome-selfhosted software
- awesome-sysadmin resources
- Self-Hosted Podcast from Jupiter Broadcasting
Any issues on the community? Report it using the report flag.
Questions? DM the mods!
founded 3 years ago
MODERATORS
Nope. Your entire server can be scanned in less than a second for an open ssh port.
IPv6 does not change the fact since when your server is attacked the hist IP is already known.
Maybe I'm missing something but how is the host ip known? The server has a maybe-known range of addresses, but I don't announce which address has an sshd listening. There are 2**64 addresses in the range, so scanning in 1 second doesn't sound feasible.
I've never seen an attack that scans all ports. Normally it just checks open ports and then tries common credentials and exploits. If that fails it moves on to the next IP.
Changing the default port on SSH probably isn't going to do much as SSH is already pretty secure. However it is a good rule of thumb to change the defaults.