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Network Neighborhood

2020 August 12

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netwhood_porter in Network Neighborhood
Добро пожаловать, сосед!
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Пароль: 64942254
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abslimit in Network Neighborhood
RIPE NCC  выкатили свое видение про "на Байнет напали хацкеры-пыщ-пыщ"

https://labs.ripe.net/Members/alun_davies/our-first-glance-at-the-belarus-outages

Если у кого-то есть время и компетенции — буду благодарен переводу на русский (и беларуский!) язык.

Статья, кстати, хорошая. С графиками
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Janith in Network Neighborhood
Hi
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Janith in Network Neighborhood
anyone know how to determine icmp header length?
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abslimit in Network Neighborhood
Janith
anyone know how to determine icmp header length?
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abslimit in Network Neighborhood
32 bytes
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abslimit in Network Neighborhood
sorry
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abslimit in Network Neighborhood
4
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abslimit in Network Neighborhood
4 bytes
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abslimit in Network Neighborhood
type code and checksum
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Janith in Network Neighborhood
abslimit
4 bytes
but,id and sequence number is there(optional) .
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Janith in Network Neighborhood
id+seq+data
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abslimit in Network Neighborhood
Janith
but,id and sequence number is there(optional) .
ICMP just pack inside itself an IP packet
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Janith in Network Neighborhood
abslimit
ICMP just pack inside itself an IP packet
then,how decapsulate works at icmp ? is there a way to get length of headers with options or not ?
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Janith in Network Neighborhood
EX:b'\x00\x00w\x90\x03\xe8\x00\x01ABCD'
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abslimit in Network Neighborhood
Janith
then,how decapsulate works at icmp ? is there a way to get length of headers with options or not ?
IP have a total lenght field
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Janith in Network Neighborhood
abslimit
IP have a total lenght field
yeah
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abslimit in Network Neighborhood
Headers of what?
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Janith in Network Neighborhood
but,how to verify options are applied(id,seq) or not?
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abslimit in Network Neighborhood
ICMP have 4 fixed bytes and then a copied IP packet
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