Increase rpc rate limits (#6626)

* Increase rate limits for byrange requests

* Merge branch 'unstable' into reduce-blob-limits

* Update limits

beacon_node/lighthouse_network/src/rpc/config.rs

@@ -104,15 +104,14 @@ impl RateLimiterConfig {
     pub const DEFAULT_META_DATA_QUOTA: Quota = Quota::n_every(2, 5);
     pub const DEFAULT_STATUS_QUOTA: Quota = Quota::n_every(5, 15);
     pub const DEFAULT_GOODBYE_QUOTA: Quota = Quota::one_every(10);
-    pub const DEFAULT_BLOCKS_BY_RANGE_QUOTA: Quota = Quota::n_every(1024, 10);
+    // The number is chosen to balance between upload bandwidth required to serve
+    // blocks and a decent syncing rate for honest nodes. Malicious nodes would need to
+    // spread out their requests over the time window to max out bandwidth on the server.
+    pub const DEFAULT_BLOCKS_BY_RANGE_QUOTA: Quota = Quota::n_every(128, 10);
     pub const DEFAULT_BLOCKS_BY_ROOT_QUOTA: Quota = Quota::n_every(128, 10);
-    // `BlocksByRange` and `BlobsByRange` are sent together during range sync.
-    // It makes sense for blocks and blobs quotas to be equivalent in terms of the number of blocks:
-    // 1024 blocks * 6 max blobs per block.
-    // This doesn't necessarily mean that we are sending this many blobs, because the quotas are
-    // measured against the maximum request size.
-    pub const DEFAULT_BLOBS_BY_RANGE_QUOTA: Quota = Quota::n_every(6144, 10);
-    pub const DEFAULT_BLOBS_BY_ROOT_QUOTA: Quota = Quota::n_every(768, 10);
+    // `DEFAULT_BLOCKS_BY_RANGE_QUOTA` * (target + 1) to account for high usage
+    pub const DEFAULT_BLOBS_BY_RANGE_QUOTA: Quota = Quota::n_every(512, 10);
+    pub const DEFAULT_BLOBS_BY_ROOT_QUOTA: Quota = Quota::n_every(512, 10);
     // 320 blocks worth of columns for regular node, or 40 blocks for supernode.
     // Range sync load balances when requesting blocks, and each batch is 32 blocks.
     pub const DEFAULT_DATA_COLUMNS_BY_RANGE_QUOTA: Quota = Quota::n_every(5120, 10);