Selfhosted

59353 readers

541 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: we're here to support and learn from one another. Insults won't be tolerated. Flame wars are frowned upon.
No spam posting.
Posts have to be centered around self-hosting. There are other communities for discussing hardware or home computing. If it's not obvious why your post topic revolves around selfhosting, please include details to make it clear.
Don't duplicate the full text of your blog or github here. Just post the link for folks to click.
Submission headline should match the article title (don’t cherry-pick information from the title to fit your agenda).
No trolling.
No low-effort posts. This is subjective and will largely be determined by the community member reports.

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

HybridSarcasm@lemmy.world

HybridSarcasm@lemmy.hybridsarcasm.xyz

First VPS — Is 54 SSH bans in 12 hours normal? (lemmy.ml)

submitted 2 weeks ago by tanka@lemmy.ml to c/selfhosted@lemmy.world

58 comments fedilink hide all child comments

So it's my first time setting up a VPS. Is it to be expected to ban 54 IPs over a 12h timespan? The real question for me is whether this is normal or too much.

$ sudo fail2ban-client status sshd
Status for the jail: sshd
|- Filter
|  |- Currently failed: 3
|  |- Total failed:     586
|  `- Journal matches:  _SYSTEMD_UNIT=ssh.service + _COMM=sshd
`- Actions
   |- Currently banned: 51
   |- Total banned:     54
   `- Banned IP list:   [list of IPs]

fail2ban sshd.conf

$ sudo cat /etc/fail2ban/jail.d/sshd.conf 
[sshd]
enabled = true
mode = aggressive
port = ssh
backend = systemd
maxretry = 3
findtime = 600
bantime = 86400

I have disabled SSH login via password. And only allow it over an SSH key.

$ sudo sshd -T | grep -E -i 'ChallengeResponseAuthentication|PasswordAuthentication|UsePAM|PermitRootLogin'
usepam no
permitrootlogin no
passwordauthentication no

you are viewing a single comment's thread
view the rest of the comments

[–] nonentity@sh.itjust.works 5 points 1 week ago (1 children)

Rookie numbers.

My favourite f2b rule is the one strike ban on SSH root login attempts. Any IP originating a SSH root login attempt is clearly compromised, and gets black holed on all my hosts for a month.

Note: direct SSH login isn’t permitted at all, the daemon is exposed purely to log the attempts.

[–] irmadlad@lemmy.world 3 points 1 week ago (1 children)

a month.

I do it for a whole year. lol

[–] nonentity@sh.itjust.works 2 points 1 week ago (1 children)

The actual span is a random period between 2 and 4 weeks, it’s interesting to watch how long it takes for attempts to resume.

I prefer a more granular visibility, repeat offenders automagically ratchet up their stay in the sin bin.

[–] lka1988@lemmy.dbzer0.com 1 points 1 week ago

repeat offenders automagically ratchet up their stay in the sin bin.

Now that is a glorious read first thing in the morning haha