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authoruvok cheetah2024-07-08 20:20:28 +0200
committeruvok cheetah2024-07-08 20:20:28 +0200
commit2cec4c5204ce8c65fb247b0ebf5a4863f6262175 (patch)
treecbdcd4d389f8f6c66775cb80d93fa4976e1bd573
parentbe804f06dd8e064c3fc0658c570a53a53cf5b20c (diff)
Learning, updated again
-rw-r--r--_posts/2024-03-17-further-learnings-from-running-my-as.md11
1 files changed, 10 insertions, 1 deletions
diff --git a/_posts/2024-03-17-further-learnings-from-running-my-as.md b/_posts/2024-03-17-further-learnings-from-running-my-as.md
index 172168e..494262b 100644
--- a/_posts/2024-03-17-further-learnings-from-running-my-as.md
+++ b/_posts/2024-03-17-further-learnings-from-running-my-as.md
@@ -2,7 +2,7 @@
layout: post
title: Further learnings from running my AS
date: 2024-03-17 14:42 +0100
-last_modified_at: 2024-06-26 19:08 +02:00
+last_modified_at: 2024-07-08 20:17 +02:00
lang: en
categories: ["tech"]
---
@@ -114,3 +114,12 @@ Futher info:
Instead, I need to add a default blackhole.
(The filtered routes will not be in my routing table, and if I don't want to route
to them, I need to prevent the kernel from using the default upstream route).
+
+**Update 2024-07-08**
+
+- Another oops! I just realized I also have to export *my prefix* as unreachable
+ into the kernel! Otherwise, due to the way I configured the routing in Linux
+ (`ip rule add ... from <myprefix> table xxx`), when a package arrives from
+ `eth0` which addresses a host that is not present in my AS, the default route
+ will be taken. And the gateway will throw the packet back at me. And I will
+ throw it back an the gateway. And so on.