DNS Proxy

The DnsProxy class manages DNS proxy configuration objects in Palo Alto Networks' Strata Cloud Manager. It extends from BaseObject and offers methods to create, retrieve, update, list, fetch, and delete DNS proxy configurations. These configurations enable DNS proxy services on firewall interfaces, allowing you to define default DNS servers, domain-specific server rules, static DNS entries, caching behavior, and TCP/UDP query settings.

Class Overview

from scm.client import Scm

# Initialize client
client = Scm(
   client_id="your_client_id",
   client_secret="your_client_secret",
   tsg_id="your_tsg_id"
)

# Access the DNS Proxy service directly through the client
dns_proxies = client.dns_proxy

Method	Description	Parameters	Return Type
create()	Creates a new DNS proxy configuration	data: Dict[str, Any]	DnsProxyResponseModel
get()	Retrieves a DNS proxy by its unique ID	object_id: str	DnsProxyResponseModel
update()	Updates an existing DNS proxy configuration	proxy: DnsProxyUpdateModel	DnsProxyResponseModel
list()	Lists DNS proxies with optional filtering	folder: Optional[str], snippet: Optional[str], device: Optional[str], exact_match: bool = False, plus additional filters	List[DnsProxyResponseModel]
fetch()	Fetches a single DNS proxy by name within a container	name: str, folder: Optional[str], snippet: Optional[str], device: Optional[str]	DnsProxyResponseModel
delete()	Deletes a DNS proxy by its ID	object_id: str	None

DNS Proxy Model Attributes

Attribute	Type	Required	Default	Description
name	str	Yes	None	DNS proxy name. Max 31 chars
id	UUID	Yes*	None	Unique identifier (*response/update only)
enabled	bool	No	None	Enable DNS proxy
default	DnsProxyDefaultServer	No	None	Default DNS server configuration
interface	List[str]	No	None	Interfaces on which to enable DNS proxy service
domain_servers	List[DnsProxyDomainServer]	No	None	DNS proxy rules (domain servers). API alias: domain-servers
static_entries	List[DnsProxyStaticEntry]	No	None	Static domain name mappings. API alias: static-entries
tcp_queries	DnsProxyTcpQueries	No	None	TCP queries configuration. API alias: tcp-queries
udp_queries	DnsProxyUdpQueries	No	None	UDP queries configuration. API alias: udp-queries
cache	DnsProxyCache	No	None	DNS cache configuration
folder	str	No**	None	Folder location. Max 64 chars
snippet	str	No**	None	Snippet location. Max 64 chars
device	str	No**	None	Device location. Max 64 chars

* Only required for update and response models ** Exactly one container (folder/snippet/device) must be provided for create operations

note

Several fields use aliases to map between Python attribute names (using underscores) and the API's hyphenated field names. For example, domain_servers maps to domain-servers in the API, static_entries maps to static-entries, tcp_queries maps to tcp-queries, and udp_queries maps to udp-queries. The SDK handles this mapping automatically when serializing and deserializing data.

Exceptions

Exception	HTTP Code	Description
InvalidObjectError	400	Thrown when provided data or parameters are invalid
MissingQueryParameterError	400	Thrown when required query parameters (e.g., name or folder) are missing
NameNotUniqueError	409	DNS proxy name already exists
ObjectNotPresentError	404	DNS proxy not found
ReferenceNotZeroError	409	DNS proxy still referenced by other objects
AuthenticationError	401	Authentication failed
ServerError	500	Internal server error

Methods

List DNS Proxies

# List all DNS proxies in a folder
proxies = client.dns_proxy.list(
   folder="Texas"
)

# Process results
for proxy in proxies:
   print(f"Name: {proxy.name}, Enabled: {proxy.enabled}")

Filtering Responses

The list() method supports additional parameters to refine your query results even further. Alongside basic filters, you can leverage the exact_match, exclude_folders, exclude_snippets, and exclude_devices parameters to control which objects are included or excluded after the initial API response is fetched.

Parameters:

• exact_match (bool): When True, only objects defined exactly in the specified container (folder, snippet, or device) are returned. Inherited or propagated objects are filtered out.
• exclude_folders (List[str]): Provide a list of folder names that you do not want included in the results.
• exclude_snippets (List[str]): Provide a list of snippet values to exclude from the results.
• exclude_devices (List[str]): Provide a list of device values to exclude from the results.

Examples:

# Only return proxies defined exactly in 'Texas'
exact_proxies = client.dns_proxy.list(
   folder='Texas',
   exact_match=True
)

for proxy in exact_proxies:
   print(f"Exact match: {proxy.name} in {proxy.folder}")

# Exclude all proxies from the 'All' folder
no_all_proxies = client.dns_proxy.list(
   folder='Texas',
   exclude_folders=['All']
)

for proxy in no_all_proxies:
   assert proxy.folder != 'All'
   print(f"Filtered out 'All': {proxy.name}")

Controlling Pagination with max_limit

The SDK supports pagination through the max_limit parameter, which defines how many objects are retrieved per API call. By default, max_limit is set to 2500. The API itself imposes a maximum allowed value of 5000. If you set max_limit higher than 5000, it will be capped to the API's maximum. The list() method will continue to iterate through all objects until all results have been retrieved. Adjusting max_limit can help manage retrieval performance and memory usage when working with large datasets.

Example:

from scm.client import Scm

# Initialize client
client = Scm(
   client_id="your_client_id",
   client_secret="your_client_secret",
   tsg_id="your_tsg_id"
)

# Configure max_limit using the property setter
client.dns_proxy.max_limit = 4000

# List all proxies - auto-paginates through results
all_proxies = client.dns_proxy.list(folder='Texas')

Fetch a DNS Proxy

# Fetch by name and folder
proxy = client.dns_proxy.fetch(
   name="corp-dns-proxy",
   folder="Texas"
)
print(f"Found proxy: {proxy.name}")

# Get by ID
proxy_by_id = client.dns_proxy.get(proxy.id)
print(f"Retrieved proxy: {proxy_by_id.name}")

Create a DNS Proxy

from scm.client import Scm

# Initialize client
client = Scm(
   client_id="your_client_id",
   client_secret="your_client_secret",
   tsg_id="your_tsg_id"
)

# Create a basic DNS proxy with default server
proxy_data = {
   "name": "corp-dns-proxy",
   "enabled": True,
   "default": {
      "primary": "8.8.8.8",
      "secondary": "8.8.4.4"
   },
   "interface": ["ethernet1/1"],
   "folder": "Texas"
}

new_proxy = client.dns_proxy.create(proxy_data)
print(f"Created DNS proxy with ID: {new_proxy.id}")

# Create a DNS proxy with domain-specific rules and caching
advanced_proxy = {
   "name": "advanced-dns-proxy",
   "enabled": True,
   "default": {
      "primary": "10.0.0.1",
      "secondary": "10.0.0.2"
   },
   "interface": ["ethernet1/1", "ethernet1/2"],
   "domain-servers": [
      {
         "name": "internal-domains",
         "domain-name": ["*.corp.example.com", "*.internal.example.com"],
         "primary": "10.1.0.1",
         "secondary": "10.1.0.2",
         "cacheable": True
      }
   ],
   "static-entries": [
      {
         "name": "app-server",
         "domain": "app.corp.example.com",
         "address": ["10.2.0.100"]
      }
   ],
   "cache": {
      "enabled": True,
      "cache-edns": False,
      "max-ttl": {
         "enabled": True,
         "time-to-live": 3600
      }
   },
   "folder": "Texas"
}

adv_proxy = client.dns_proxy.create(advanced_proxy)
print(f"Created advanced DNS proxy with ID: {adv_proxy.id}")

Update a DNS Proxy

# Fetch existing proxy
existing_proxy = client.dns_proxy.fetch(
   name="corp-dns-proxy",
   folder="Texas"
)

# Update the default DNS servers
existing_proxy.default = {
   "primary": "1.1.1.1",
   "secondary": "1.0.0.1"
}

# Perform update
updated_proxy = client.dns_proxy.update(existing_proxy)

Delete a DNS Proxy

# Delete by ID
proxy_id = "123e4567-e89b-12d3-a456-426655440000"
client.dns_proxy.delete(proxy_id)

Use Cases

Performing Commits

# Prepare commit parameters
commit_params = {
   "folders": ["Texas"],
   "description": "Updated DNS proxy configurations",
   "sync": True,
   "timeout": 300  # 5 minute timeout
}

# Commit the changes directly on the client
result = client.commit(**commit_params)

print(f"Commit job ID: {result.job_id}")

Monitoring Jobs

# Get status of specific job directly from the client
job_status = client.get_job_status(result.job_id)
print(f"Job status: {job_status.data[0].status_str}")

# List recent jobs directly from the client
recent_jobs = client.list_jobs(limit=10)
for job in recent_jobs.data:
   print(f"Job {job.id}: {job.type_str} - {job.status_str}")

Error Handling

from scm.client import Scm
from scm.exceptions import (
   InvalidObjectError,
   MissingQueryParameterError,
   NameNotUniqueError,
   ObjectNotPresentError,
   ReferenceNotZeroError
)

# Initialize client
client = Scm(
   client_id="your_client_id",
   client_secret="your_client_secret",
   tsg_id="your_tsg_id"
)

try:
   # Create DNS proxy
   proxy_config = {
      "name": "test-dns-proxy",
      "enabled": True,
      "default": {
         "primary": "8.8.8.8"
      },
      "interface": ["ethernet1/1"],
      "folder": "Texas"
   }

   new_proxy = client.dns_proxy.create(proxy_config)

   # Commit changes
   result = client.commit(
      folders=["Texas"],
      description="Added DNS proxy",
      sync=True
   )

   # Check job status
   status = client.get_job_status(result.job_id)

except InvalidObjectError as e:
   print(f"Invalid proxy data: {e.message}")
except NameNotUniqueError as e:
   print(f"Proxy name already exists: {e.message}")
except ObjectNotPresentError as e:
   print(f"Proxy not found: {e.message}")
except ReferenceNotZeroError as e:
   print(f"Proxy still in use: {e.message}")
except MissingQueryParameterError as e:
   print(f"Missing parameter: {e.message}")

Related Topics

• DnsProxyBaseModel
• DnsProxyCreateModel
• DnsProxyUpdateModel
• DnsProxyResponseModel