# Настройка на обратной стороне

С обратной стороны нужно произвести симметричную настройку.\
Поэтому просто применяем следующую конфигурацию на R3:

```
crypto isakmp policy 1
encr aes
authentication pre-share
crypto isakmp key CISCO address 100.0.0.1
!
!
crypto ipsec transform-set AES128-SHA esp-aes esp-sha-hmac 
! 
crypto map MAP1 10 ipsec-isakmp 
set peer 100.0.0.1
set transform-set AES128-SHA 
match address 101

interface FastEthernet0/1
crypto map MAP1

access-list 101 permit ip host 10.1.1.0 host 10.0.0.0
```

Вот и всё.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://linkmeup.gitbook.io/sdsm/7.-vpn/2.-ipsec/1.-rezimy-raboty/0.-praktika/1-nastroika-na-obratnoi-storone.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.