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fix: Handle missing Docker DNS rules gracefully in firewall script

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Add error handling for grep when no Docker DNS rules exist, preventing
script failure on default Docker networks while still preserving DNS
functionality on custom networks.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Kurt Carpenter
2025-07-30 10:54:05 -07:00
parent 78e0785950
commit dde41f6225
1 changed files with 1 additions and 1 deletions
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2
.devcontainer/init-firewall.sh
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@@ -3,7 +3,7 @@ set -euo pipefail # Exit on error, undefined vars, and pipeline failures
IFS=$'\n\t' # Stricter word splitting
# 1. Extract Docker DNS info BEFORE any flushing
DOCKER_DNS_RULES=$(iptables-save -t nat | grep "127\.0\.0\.11")
DOCKER_DNS_RULES=$(iptables-save -t nat | grep "127\.0\.0\.11" || true)
# Flush existing rules and delete existing ipsets
iptables -F