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6-Huawei Firewall: configure NAT based on source IP address

2025-02-23 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Network Security >

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Experiment 1: configure No-Pat

1. Basic configuration:

2. R1 enables the Telnet function:

[R1] user-interface vty 0 4

[R1-ui-vty0-4] authentication-mode password?

Please press ENTER to execute command

[R1-ui-vty0-4] authentication-mode password

Please configure the login password (maximum length 16): cisco

[R1-ui-vty0-4] user privilege level 15

3. Configure the inter-Zone policy from Trust to Untrust:

[SRG] policy interzone trust untrust outbound

[SRG-policy-interzone-trust-untrust-outbound] policy create-mode auto-sort enable

[SRG-policy-interzone-trust-untrust-outbound] policy 5

[SRG-policy-interzone-trust-untrust-outbound-5] policy source 192.168.1.0 mask 24

[SRG-policy-interzone-trust-untrust-outbound-5] policy destination 202.100.1.0 mask 24

[SRG-policy-interzone-trust-untrust-outbound-5] policy service service-set telnet

[SRG-policy-interzone-trust-untrust-outbound-5] policy service service-set icmp

[SRG-policy-interzone-trust-untrust-outbound-5] action permit

4. The address of NAT is not translated before deployment:

Telnet 202.100.1.1

Login authentication

Password:cisco

5. Configure no-pat:

[SRG] nat address-group 1 202.100.1.10 202.100.1.20 / / create an address group

[SRG] nat-policy interzone trust untrust outbound / / create a NAT policy between Zone

[SRG-nat-policy-interzone-trust-untrust-outbound] policy 0

[SRG-nat-policy-interzone-trust-untrust-outbound-0] policy source 192.168.1.0 mask 24 / / Source address segment to be converted

[SRG-nat-policy-interzone-trust-untrust-outbound-0] address-group 1 no-pat / / translated address group and does not translate to port

[SRG-nat-policy-interzone-trust-untrust-outbound-0] action source-nat / / perform source conversion action

Test:

Telnet 202.100.1.1

View firewall session translation:

[SRG] display firewall session table verbose / / source port 50573, the translated port is still 50573

View the firewall Map:

[SRG] display firewall server-map

Experiment 2: configure PAT, port translation with external address pool

[SRG-nat-policy-interzone-trust-untrust-outbound-0] undo address-group

[SRG-nat-policy-interzone-trust-untrust-outbound-0] address-group 1

Test:

Telnet 202.100.1.1

[SRG] display firewall session table verbose

III. Experiment 3: configure Easy-IP to convert 192.168.1.2 to USG's g0Uniplet0 interface address.

[SRG] nat-policy interzone trust untrust outbound

[SRG-nat-policy-interzone-trust-untrust-outbound-1] policy 0

[SRG-nat-policy-interzone-trust-untrust-outbound-0] undo address-group

[SRG-nat-policy-interzone-trust-untrust-outbound-0] easy-ip GigabitEthernet 0/0/0

Test:

[SRG] display firewall session table verbose

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