diff --git a/README.md b/README.md
index 6fbe051..8737769 100644
--- a/README.md
+++ b/README.md
@@ -74,6 +74,7 @@ Global flags:
 - `--log-level <error|warn|info|debug|trace>`
 - `--log-format <text|json>`
 - `--log-file <path>`
+- `NETTOOL_LOG_FILTER` or `RUST_LOG` can override log filters (ex: `maxminddb::decoder=debug`)
 
 Command flags (implemented):
 - `sys ip`: `--all`, `--iface <name>`
diff --git a/crates/wtfnet-core/src/lib.rs b/crates/wtfnet-core/src/lib.rs
index 62b2555..5c511df 100644
--- a/crates/wtfnet-core/src/lib.rs
+++ b/crates/wtfnet-core/src/lib.rs
@@ -3,6 +3,7 @@ use std::path::{Path, PathBuf};
 use time::format_description::well_known::Rfc3339;
 use time::OffsetDateTime;
 use tracing_subscriber::prelude::*;
+use tracing_subscriber::EnvFilter;
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct CommandEnvelope<T> {
@@ -227,9 +228,10 @@ fn init_logging_text(
     log_file: Option<&PathBuf>,
 ) -> Result<LoggingHandle, Box<dyn std::error::Error>> {
     let (writer, guard) = logging_writer(log_file)?;
+    let filter = build_log_filter(level_filter);
     let layer = tracing_subscriber::fmt::layer()
         .with_writer(writer)
-        .with_filter(level_filter);
+        .with_filter(filter);
     tracing_subscriber::registry().with(layer).init();
     Ok(LoggingHandle { _guard: guard })
 }
@@ -239,14 +241,27 @@ fn init_logging_json(
     log_file: Option<&PathBuf>,
 ) -> Result<LoggingHandle, Box<dyn std::error::Error>> {
     let (writer, guard) = logging_writer(log_file)?;
+    let filter = build_log_filter(level_filter);
     let layer = tracing_subscriber::fmt::layer()
         .with_writer(writer)
         .json()
-        .with_filter(level_filter);
+        .with_filter(filter);
     tracing_subscriber::registry().with(layer).init();
     Ok(LoggingHandle { _guard: guard })
 }
 
+fn build_log_filter(level_filter: tracing_subscriber::filter::LevelFilter) -> EnvFilter {
+    if let Ok(filter) = EnvFilter::try_from_env("NETTOOL_LOG_FILTER") {
+        return filter;
+    }
+    if let Ok(filter) = EnvFilter::try_from_default_env() {
+        return filter;
+    }
+    EnvFilter::default()
+        .add_directive(level_filter.into())
+        .add_directive("maxminddb::decoder=off".parse().unwrap())
+}
+
 fn logging_writer(
     log_file: Option<&PathBuf>,
 ) -> Result<