Creating SSL Forward Proxy Profiles
Use the SSL Forward Proxy Profile page to view and manage SSL proxy profile details. SSL proxy is enabled as an application service within a security policy. You specify the traffic that you want the SSL proxy enabled on as match criteria and then specify the SSL proxy profile to be applied to the traffic.
Before You Begin
Read the SSL Forward Proxy Overview topic.
Review the SSL Forward Proxy Profile main page for an understanding of your current data set. See SSL Forward Proxy Profile Main Page Fields for field descriptions.
To create an SSL forward proxy profile:
- Select Configure > SSL Profiles> SSL Proxy Profiles.
The SSL Proxy Profiles page appears.
- Select Forward Proxy from the Create list.
- Complete the configuration according to the guidelines provided in Table 1.
- Click OK.
An SSL forward proxy profile is created that can be assigned to a firewall policy for advanced security options.
If none of the services (AppFW, IDP, or AppTrack) are configured, then SSL proxy services are bypassed even if an SSL proxy profile is attached to a firewall policy.
Table 1: SSL Forward Proxy Profile Settings
Enter a unique string of alphanumeric characters, colons, periods, dashes, and underscores. No spaces are allowed; maximum length is 63 characters.
Enter a description for the SSL forward proxy profile; maximum length is 1024 characters.
Select a preferred cipher. Ciphers are divided into the following categories depending on their key strength.
Select the set of ciphers the SSH server can use to perform encryption and decryption functions. If this option is not configured, the server accepts any supported suite that is available.
The available custom ciphers are:
Select this option to enable flow trace for troubleshooting policy-related issues.
Select or add a root certificate. In a public key infrastructure (PKI) hierarchy, the root CA is at the top of the trust path. The root CA identifies the server certificate as a trusted certificate.
Click Add for a new root certificate. On the Add page, select a device and the trusted CAs to associate to the root certificate.
Note: To view the SSL certificates in Security Director, select Devices>Security Devices, choose the relevant device, right-click the device or select Refresh Certificate from the More menu. Once the refresh certificate job is completed, you can see SSL certificates.
Make sure the device configuration is in sync with Security Director. If the device configuration is out of sync in security devices, resynchronize network and then proceed with refresh certificates.
Select addresses to create allowlists that bypass SSL forward proxy processing.
Because SSL encryption and decryption are complicated and expensive procedures, network administrators can selectively bypass SSL proxy processing for some sessions. Such sessions mostly include connections and transactions with trusted servers or domains with which network administrators are very familiar. There are also legal requirements to exempt financial and banking sites. Such exemptions are achieved by configuring the IP addresses or domain names of the servers under allowlists.
Exempted URL Categories
Starting in Junos Space Security Director Release 16.2, you can select URL categories to create allowlists that bypass SSL forward proxy processing.
These URL categories are exempted during SSL inspection. Only the predefined URL categories can be selected for the exemption.
Note: Ensure to filter with Enhanced when you select exempted URL categories in the SSL profile.
Server Authentication Failure
Select this option to ignore server authentication completely.
In this case, SSL forward proxy ignores errors encountered during the server certificate verification process (such as CA signature verification failure, self-signed certificates, and certificate expiry).
We do not recommend this option for authentication, because configuring it results in websites not being authenticated at all. However, you can use this option to effectively identify the root cause for dropped SSL sessions.
Select the Disable Session Resumption option if you do not want session resumption.
To improve throughput and still maintain an appropriate level of security, SSL session resumption provides a session caching mechanism so that session information, such as the pre-master secret key and agreed-upon ciphers, can be cached for both the client and server.
Select this option to generate logs. You can choose to log all events, warnings, general information, errors, or different sessions (allowlisted, allowed, dropped, or ignored).
After a session is created and SSL tunnel transport has been established, a change in SSL parameters requires renegotiation. SSL forward proxy supports both secure (RFC 5746) and nonsecure (TLS v1.0 and SSL v3) renegotiation.
Select one of the following options if a change in SSL parameters requires renegotiation:
When session resumption is enabled, session renegotiation is useful in the following situations: