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Bug #10879

closed

SSH lockout table - Bogons IPv6 table to large and blocks firewall re-loading (and upon reboot) locks up all LAN traffic to internet

Added by Eric Veum over 3 years ago. Updated over 3 years ago.

Status:
Duplicate
Priority:
Normal
Assignee:
-
Category:
Rules / NAT
Target version:
-
Start date:
09/08/2020
Due date:
% Done:

0%

Estimated time:
Plus Target Version:
Release Notes:
Affected Version:
2.5.x
Affected Architecture:

Description

The firewall rules do not load, due to some SSH 'lockout table complaining there are too many bogonsv6 from /etc/bogonsv6 to load into a list/array, leading to firewall not coming on line when FW started up, device non-functional as a result.

Error:
There were error(s) loading the rules: /tmp/rules.debug:19: cannot define table bogonsv6: too many elements. - The line in question reads [19]: table <bogonsv6> persist file "/etc/bogonsv6"

#SSH Lockout Table
table <sshguard> persist
#Snort tables
table <snort2c>
table <virusprot>
table <bogons> persist file "/etc/bogons"
table <bogonsv6> persist file "/etc/bogonsv6" (LINE 19)
table <negate_networks>

My /etc/bogonsv6 - it has 113k entires in it.

I had to cut the bogonsv6 file down to a small number of entries, e.g. as seen to bring the traffic management on-line.

  1. last updated 1598935801 (Tue Sep 1 04:50:01 2020 GMT)
    100::/8
    200::/7
    400::/6
    800::/5
    1000::/4
    2000::/16
    4000::/2
    8000::/1

Frankly, I don't want 133k IPv6 FW rules for ssh -- its not practical to manage security and network ingress that way, and well, I also notice the sshd is bound to ALL interface, which is a security problem to have it openly listen to the internet in this new release.

The proper way to design this: ** THE SSH should be able to be bound to ONLY the internal interfaces, like the DNS resolver !!!!!


Files

fw_problem_etc-bogonsv6 (1.76 MB) fw_problem_etc-bogonsv6 Eric Veum, 09/08/2020 10:05 AM
fw_problem-rules.debug (11.9 KB) fw_problem-rules.debug Eric Veum, 09/08/2020 10:05 AM
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