Network technologies and trends


February 8, 2017  7:19 AM

Palo Alto Networks launches PAN-OS 8.0

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
AWS, Azure, cloud, Cyberattacks, Data Center, Firewalls, GATEWAY, Internet, KVM, NSX, OpenStack, Palo Alto Networks, Phishing, Private Cloud, Public Cloud, SaaS, Sandbox, VM, VMware, Wildfire

On February 7, 2017 Palo Alto Network launched PAN-OS 8.0 with more than 70 new enhancements and capabilities which can prevent successful cyberattacks.

figure-1-1-pan-os-8-0

Courtesy : Palo Alto Networks

As the market share of multi-cloud architectures is increasing day by day , this growth is often a source of security concern. Be it public could, private cloud or software-defined data centres they all pose the same challenge , may be the complexity varies. Keeping in this view Palo Alto Networks have optimised their virtualized next-generation firewalls with new VM-Series models. The newly released PAN-OS 8.0  expands the VM-Series with new models and optimized performance, making it the broadest, most powerful line of virtualized firewall appliances on the market. New scalability and resiliency features for Microsoft® Azure® and Amazon® Web Services enable organizations to build secure cloud centric architectures. Workflow automation features for VMware® NSX® and KVM with OpenStack® help streamline VM-Series deployments.

PAN-OS 8.0 includes numerous enhancements that will provide organizations with significant new capabilities to prevent successful cyberattacks and secure high-performance network, endpoint and cloud environments.

PAN-OS 8.0:

Enhances visibility, control and scale in all major clouds, such as AWS, Azure and SaaS.
Puts a stop to sandbox-evasive malware and automates the detection of command and control.
Greatly increases Panorama™ network security management performance, enriches context with Traps™ advanced endpoint protection logs, and automates actions and service ticketing tools, such as ServiceNow®.
Prevents automated credential theft and abuse, built in to PAN-OS 8.0.
Delivers high-performance new hardware, PA-5200 Series, PA-800 Series and PA-220 to address encrypted traffic and data center consolidation, and increase internet gateway demands.

One feature which caught our attention which worth mentioning is  “WildFire Phishing Verdict”. The new WildFire Phishing Verdict classifies phishing links detected in emails separately from other emailed links found to be exploits or malware. The firewall logs WildFire submissions that are phishing links to indicate that such a link has been detected in an email. With both a WildFire license and a PAN-DB license, you can block access to phishing sites within 5 minutes of initial discovery. However the WF-500 appliances are not capable of supporting the  new phishing verdict.

Since its  new release it may need some time to get matured, its always recommended to seek the guidance of Palo Alto TAC support for the most stable release to upgrade the Palo Alto Next Generation Firewalls.

February 7, 2017  9:13 AM

Apple iOS 10.2.1 and Palo Alto Global Protect issues

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
"Apple Store", Apple, GATEWAY, IOS, Palo Alto Networks

The recent Apple iOS 10.2.1 update has created an issue with Palo Alto global protect agent for iOS devices. Its been observed that the Palo Alto Global Protect client hangs and never opens. The only way one could open a Global Protect client is uninstall and reinstall it. Once the client is reinstalled it opens for first time and its gives an opportunity to enter Server details and login credentials. Once those details are entered, again the same issue occurs. Always the Global Protect client fails to open.

This situation holds good only when the an Apple device is upgraded to an iOS version 10.2.1 and the Global Protect portal is using a self-sign certificate.

The only way to overcome this issue, is to use a valid trusted certificate issued by trusted CA. Once a valid CA certificate is installed the issue will be resolved. However one has to delete the Global Protect Client and reinstall it from an Apple store as the certificate is automatically binded with an app and it cannot be revoked.

There is one more catch as one cannot use wild card certificates with Global Protect portal, often one will see an error ” Gateway xxxxx.com: Server certificate verification failed”. Its always recommended to use a specific certificate which includes the hostname (dns name) in the Subject Alternative Name (SAN) attribute, it should also match the Common Name of the certificate).

figure-1-1-global-protect-server-certificate-veri

 

Its been observed the recent iOS upgrade has also impacted Microsoft Active Sync as well, unconfirmed sources says Apple is aware of this  issue and they are expected to issue a fix in next iOS updates.


February 5, 2017  7:55 AM

Cisco 2017 Cyber Security Report is released.

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Cisco, Cisco security, Cyber security, malware, Security policy, Spam, vulnerabilities

Recently Cisco released their annual Cyber Security Report for year 2017. The report presents an insight onto the latest security trends, from the study Cisco conducted across 13 countries with more than 2,900 respondents. The 110 page report is divided into two sections

cisco-cyber-security-report

Courtesy: Cisco Systems

  • Attacker Behavior
  • Defender Behavior

We this two sections gives an overview how an attackers observe vulnerable networks and deliver malware. What tools they are using to achieve this task.   On other hand how end users are reacting, are they patching the updates ?  What kind of security measures they are adopting.

Some of the key findings according Cisco along with our views are as follows

  • Most companies use more than five security vendors to secure their environment. Well this seems to be a good trend as one cannot solely rely on one Security Vendor for complete security. This always add some defense in depth. Its been observed often those organizations are less affected by latest attacks, who adopted multi vendor approached.  The solid example one could have is the recent Shamoon 2 attacks target major Saudi Organizations had little impact on Organizations who had latest security updates and yes they employed multi-vendor security products.
  • Budget is the top constraint for major organizations to adopt advance security products, this been a case for at least a decade, often Organizations are not aware of the impact one could face by not investing in security products. Awareness among top management need to be created.
  • According to an investigation conducted by Cisco across 130 organizations across verticals reveals at least 75% of the companies are affected adware infections. Again people are not educated and awareness need to be created among the end user by organizations to ensure their employees don’t get fooled by this.
  • 65% of total emails circulated are spam and about 8 to 10% of them are malware. Good email security solutions are needed to stop them. Cisco ESA powered by AMP proves to be one of good security solution to stop spam and infected emails.

Cisco gives an interesting snapshot of the sources of concerns for Security professionals to secure their environment, its proves Mobile devices followed by public could data constitutes major source of concern to protect.

figure-1-1-security-professional-concerns

Courtesy : Cisco Cyber Security Report

Its worth reading the complete the report as it has great info and could add value to security professionals to come our with their Security Vision for year 2017.

 


January 31, 2017  5:23 AM

Time to welcome CCIE Security Version 5 Written and Lab exam

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
ASA, CCIE, Cisco, cloud, CUCM, Email, Firewalls, Private Cloud, Python, Routing, Switching, UCS, virtual, VPN, Windows 2008, Windows 7, Wireless

Starting today i.e. 31st Jan 2017 , CCCIE Security Version 5 exams both lab and written are available for all CCIE aspirers all over the globe in authorised centres. The written exam known as CCIE Security Written Exam (400-251) version 5.0 is a two-hour test with 90-110 questions. However  the CCIE Security LAN Exam version 5.0 comes with major changes. It follows the same  pattern of CCIE R&S, CCIE Data Centre and CCIE Service Provider. Its an eight-hour lab divided into three modules

  • Troubleshooting module
  • Diagnostic module
  • Configuration Module

Cisco has released a unified Blue Print which covers the topics for both written and lab exam. The blue print is divided into six sections or domains. All these domains are part of both written and lab exam with an exception of Evolving technologies domain. This domain is only part of the CCIE Security Written exam.

Domain Written Exam (%) Lab Exam (%)
1.0 Perimeter Security and Intrusion Prevention 21% 23%
2.0 Advanced Threat Protection and Content Security 17% 19%
3.0 Secure Connectivity and Segmentation 17% 19%
4.0 Identity Management, Information Exchange, and Access Control 22% 24%
5.0 Infrastructure Security, Virtualization, and Automation 13% 15%
6.0 Evolving Technologies 10% N/A

Following topics have been removed from CCIE Security Version 5 exam

  • Legacy IPS
  • Easy VPN

These topics were part of CCIE Security Version 4 exams. However they are no more relevant to version 5 exam.

A huge list of topics are added to CCIE Security Version 5 exams , some of them are as follows

  • FirePOWER
  • Cisco FirePOWER Threat Defense (FTD)
  • ASA Clustering
  • NAT for IPv6
  • Firepower Management Center (FMC)
  • Cloud Web Security
  • Email Security Appliance (ESA)
  • Content Security Management Appliance
  • Advance Malware Protection (AMP)
  • OpenDNS
  • Lancope
  • Virtual Security Gateway
  • TrustSEC with SGT and SXP
  • ACI, EVPN, VXLAN and NVGRE
  • ISE Personas with multimode deployment
  • MDM Integration with ISE
  • EAP-TEAP
  • pxGRID
  • Wireless concepts such as FlexCONNECT and ANCHOR
  • NetFLOW/IPFIX and eStreamer
  • APIC-EM Controller
  • RESTful API in scripting languages such as Python
  • Evolving Technologies (Cloud, SDN and IoT) are part of written exam only

The CCIE Security Version 5 Lab will be delivered using following hardware and software appliances

Virtual Machines

  • Security Appliances
    • Cisco Identity Services Engine (ISE): 2.1.0
    • Cisco Secure Access Control System (ACS): 5.8.0.32
    • Cisco Web Security Appliance (WSA): 9.2.0
    • Cisco Email Security Appliance (ESA): 9.7.1
    • Cisco Wireless Controller (WLC): 8.0.133
    • Cisco Firepower Management Center Virtual Appliance: 6.0.1 and/or 6.1
    • Cisco Firepower NGIPSv: 6.0.1
    • Cisco Firepower Threat Defense: 6.0.1
  • Core Devices
    • IOSv L2: 15.2
    • IOSv L3: 15.5(2)T
    • Cisco CSR 1000V Series Cloud Services Router: 3.16.02.S
    • Cisco Adaptive Security Virtual Appliance (ASAv): 9.6.1
  • Others
    • Test PC: Microsoft Windows 7
    • Active Directory: Microsoft Windows Server 2008 (AD is not required to be configured by the candidate)
    • Cisco Application Policy Infrastructure Controller Enterprise Module : 1.2
    • Cisco Unified Communications Manager: (The CUCM is not required to be configured by the candidate)
    • FireAMP Private Cloud
    • AnyConnect 4.2

Physical Devices

  • Cisco Catalyst Switch: C3850-12S 16.2.1
  • Cisco Adaptive Security Appliance: 5512-X: 9.6.1
  • Cisco 2504 Wireless Controller: 2504: 8.0.133.0
  • Cisco Aironet: 1602E: 15.3.3-JC
  • Cisco Unified IP Phone: 7965: 9.2(3) (IP Phone is not required to be configured by the candidate)

CCIE Security exam is going to be quite challenging as there are quite new Security products introduced by Cisco in the year 2015 & 2016 and now they are part of the CCIE Security exam. The challenge one could face is related to Cisco FirePOWER Threat Defense as, its not used widely deployed by enterprise customers. It would be great if Cisco start providing some of the virtual appliances in Cisco VIRL. This makes one’s life easy to try out the new products. We wish all the best for those who are planning to take the CCIE Security Challenge.


January 30, 2017  7:14 AM

What is the error “Unable to launch device manager from x.x.x.x” in ASA Firewall?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
ASDM, cipher, Cisco, Device Manager, Java, SSL

We were trying to access the Cisco ASA Firewall using the ASDM, while accessing the login credential prompt came. After entering all the valid credentials an error “Unable to launch device manager from x.x.x.x” appeared.

figure-1-1-adsm-launch-error

One of the known issues why the error “Unable to launch device manager from x.x.x.x” appears is due to disabling of some of the SSL encryption cipher. One should ensure following ciphers are enabled in the ASA Firewall

  • aes128-sha1
  • dhe-aes128-sha1
  • rc4-sha1
  • 3des-sha1

If by mistake some one deleted above mentioned ciphers and just kept the below mentioned ciphers the ASDM will not work

  • aes-256-sha1
  • dhe-aes256sha1

Another known issue is related to Java, however in our case all these things were good yet we were seeing the error “Unable to launch device manager from x.x.x.x”.

One more strange observation we saw was once we login to any other ASA Firewall using ASDM we could login to the affected firewall just clicking its IP from the device list shown on the left panel of ASDM with our any error.

figure-1-2-asdm

When we checked the configuration related to ASDM it was fine there were no issues with that, and also ASDM image was available in the ASA Firewall.

The only fix which worked for us was to reinstall the ASDM image in the ASA Firewall. Once the ASDM file was copied to the ASA firewall the error “Unable to launch device manager from x.x.x.x” disappeared.


January 29, 2017  7:10 AM

Cisco launches ISE 2.2 with a promise of more visibility and control

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Cisco, Enterprise, Internet, Internet of Things, iot, ISE, NAC, Network, Rapid7, Routers, Security, visibility, VPN, Wireless

Since the introduction of Internet in early 90’s to general public, no one ever imagined that Internet will grow so fast, and vast majority of organizations and consumers will be interconnected using the internet. It has expanded exponentially and still its is growing at its greatest speed. The invent of Internet of things (IoT) has changed the game, as huge numbers of new devices and users are interconnected either using an internet or an enterprise network . These changing  trends  have created a need not only for the visibility of the connected devices but also how control them, secure them and segment them.

According a latest blog update from Cisco suggests that its cost overs $4M on average yearly for companies to follow best-practices, such as segmentation, and mandating stringent rules and regulations in traditional way.

According to Cisco the launching of version 2.2 of the Cisco Identity Services Engine, or ISE gives their customers the visibility and control they need to defend their network from an ever-increasing number of attack vectors, contain advanced persistent threats, and secure access across today’s distributed networks.

Some of the highlights of ISE 2.2 are

Control All Access throughout the Network

  • Introducing greater control for endpoints. Coupled with much richer endpoint and application visibility, Cisco ISE can now enforce very granular user behavior and device compliance. Major improvements to architecture and functionality provide even greater access control including additional AnyConnect distribution options, more robust deployment resiliency, and the ability to support more posture functionality with non-Cisco network access devices.
  • The new, built-in ISE Setup tool makes it easier and faster than ever to get started with enterprise-grade network access security. This includes out-of-the-box wireless setup for secure access, guest services, and BYOD in as little as 10 minutes with Cisco Wireless LAN Controllers!
  • Customers of any size can now take advantage of efficient and scalable role-based segmentation through a TrustSec-enabled border router such as the Cisco ASR 1000.
  • ISE Device Administration is better than ever with the addition of features Cisco ACS customers enjoy. And migrating from ACS to ISE has been streamlined with new migration tools and resources. With the recent announcement of the ACS End-of-Sale (EoS) as well as the ACS-to-ISE Migration Program, there’s never been a better time to deploy device administration with Cisco ISE.
  • Separate administrative domains for differentiated control based on flexible criteria such as place in network, geographical location, or role and responsibilities, using multiple TrustSec matrixes.

Stop and Contain Threats 

  • Don’t just block bad devices from entering your network, get deep visibility at the application-level so you can set policy based on what the user is doing.
  • Quickly raise the drawbridges and effectively wall off your crown jewels from threats with simplified and agile threat responsiveness. Develop a next-level segmentation strategy with ISE DEFCON. Set multiple policy scenarios pre-defined within multiple TrustSec matrixes for software-defined segmentation that can be dynamically deployed immediately based on an organization’s threat climate.
  • Stop malicious devices before they connect to your network by consuming more Indications of Compromise (IoCs) from your vulnerability assessment and threat incident intelligence solutions such as TenableCisco Cognitive Threat Analytics (CTA) and Rapid7. We call this new layer of posture assessment Threat-Centric NAC.

This will certainly further enhance the end point security not only from visibility perspective but also controlling them by applying security polices and protecting them growing attacks.


January 27, 2017  2:39 PM

Are Next Generation Firewalls capable of supporting SSL/TLS interception?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Bluecoat, encrypted, F5, Firewalls, malware, performance, Security, SSL, Throughput, TLS

These days most of the traffic passes though various network  is SSL/TLS. People used to believe by using SSL encryption they are free from attacks and can protect their organisations from any call backs, malware etc. However trends are changing as attackers are capable of sending malware in the encrypted SSL tunnel, unless one doesn’t decrypt the SSL/TLS  traffic they can’t detect what’s there in the packet.

Looking at these challenges most of Next Generation Firewall started offering SSL interception for both incoming and out going traffic from the Enterprise network. This is the one added value anyone can get by having a Next Generation Firewalls as they can intercept both the incoming and outgoing SSL traffic. Does this mean are they capable of handling all the SSL traffic passes through them?

If the intercepted SSL/TLS traffic is of low volume ( in few Mega bytes) to certain extent yes the Next Generation Firewalls are capable, however this holds no good when the volume of intercepted traffic is increased. They often tends to under perform and consume all the hardware resources and finally they stop working.

The better alternative is to have a dedicated SSL descriptors. Leading companies like A10, Bluecoat and F5  are offering dedicated SSL appliances which are capable of decrypting and encrypting back the large volume of SSL /TLS traffic. One can rely on dedicated SSL appliances are they capable of supporting huge throughput, can intercept huge SSL/TLS traffic without any performance degradation.


January 16, 2017  12:27 PM

What is the error “rpf-check Result: DROP” in Cisco ASA Packet-tracer?

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Access List, ASA, Cisco, firewall, NAT

When it comes to troubleshooting with Cisco ASA Firewalls one usually rely on packet-tracer options. However NAT configuration and the way how ACL configured changes from version 8.4. Rather than configuring the ACL for a public IP, a private IP address is used as shown below

access-list OUTSIDE extended permit tcp host 222.222.222.222  host 192.168.1.50 eq 443

fig-1-1-asa-rpf-check

 

From the above scenario one could see the Inter Web Server with an IP Address 192.168.1.50 is natted to public IP 111.111.111.111.

Those who comes from strong exposure to ASA version 8.3 they issue the packet-tracer command with the IP addresses used in the ACL. However this never works and the traffic will be dropped with an error  “rpf-check Result: DROP”. This is because the UN-NAT must be equal to NAT RPF-CHECK for the packet to be passed (otherwise it will be dropped).

IKTE-ASA# packet-tracer input OUTSIDE tcp 222.222.222.222 443 192.168.1.50 443

<——-Output removed——–>

Phase: 7

Type: NAT

Subtype: rpf-check

Result: DROP

Config:

object network obj-192.168.1.50

nat (DMZ,OUTSIDE) static obj-111.111.111.111

Additional Information:

 

Result:

input-interface: OUTSIDE

input-status: up

input-line-status: up

output-interface: DMZ

output-status: up

output-line-status: up

Action: drop

Drop-reason: (acl-drop) Flow is denied by configured rule

IKTE-ASA#

In this case (static NAT)  the correct way to use  packet-tracer is to use the public IP not the private IP

IKE-ASA# packet-tracer input OUTSIDE  tcp 222.222.222.222 443 111.111.111.111 443

Phase: 1

Type: UN-NAT

Subtype: static

Result: ALLOW

Config:

nat (DMZ,OUTSIDE) source static obj-192.168.1.50 obj-111.111.111.111

Additional Information:

NAT divert to egress interface DMZ

Untranslate 111.111.111.111/443 to 192.168.1.50/443

 

Phase: 2

Type: ACCESS-LIST

Subtype: log

Result: ALLOW

Config:

access-group OUTSIDE in interface OUTSIDE
access-list OUTSIDE extended permit tcp host 222.222.222.222  host 192.168.1.50 eq 443

Phase: 3

Type: NAT

Subtype:

Result: ALLOW

Config:

nat (DMZ,OUTSIDE) source static obj-192.168.1.50 obj-111.111.111.111

Additional Information:

Static translate 222.222.222.222/443 to 222.222.222.222/443

 

Phase: 4

Type: NAT

Subtype: per-session

Result: ALLOW

Config:

Additional Information:

 

Phase: 5

Type: IP-OPTIONS

Subtype:

Result: ALLOW

Config:

Additional Information:

 

Phase: 6

Type: SFR

Subtype:

Result: ALLOW

Config:

class-map SFR

match access-list SFR

policy-map global_policy

class SFR

sfr fail-open

service-policy global_policy global

Additional Information:

 

Phase: 7

Type: FOVER

Subtype: standby-update

Result: ALLOW

Config:

Additional Information:

 

Phase: 8

Type: NAT

Subtype: rpf-check

Result: ALLOW

Config:

nat (DMZ,OUTSIDE) source static obj-192.168.1.50 obj-111.111.111.111

Additional Information:

 

Phase: 9

Type: USER-STATISTICS

Subtype: user-statistics

Result: ALLOW

Config:

Additional Information:

 

Phase: 10

Type: NAT

Subtype: per-session

Result: ALLOW

Config:

Additional Information:

 

Phase: 11

Type: IP-OPTIONS

Subtype:

Result: ALLOW

Config:

Additional Information:

 

Phase: 12

Type: USER-STATISTICS

Subtype: user-statistics

Result: ALLOW

Config:

Additional Information:

 

Phase: 13

Type: FLOW-CREATION

Subtype:

Result: ALLOW

Config:

Additional Information:

New flow created with id 333770611, packet dispatched to next module

 

Result:

input-interface: OUTSIDE

input-status: up

input-line-status: up

output-interface: DMZ

output-status: up

output-line-status: up

Action: allow

 

ITKE-ASA#


January 10, 2017  9:08 AM

Cisco announces End-of-Sale and End-of-Life Announcement for the Cisco Secure Access Control System

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
cisco ACS, Radius, tacacs

The recent of End-of-Sale and End-of-Life Announcement for the Cisco Secure Access Control System has left no option but to migrate towards Cisco Identity Services Engine (ISE) product line. Cisco has successfully implemented the Cisco Secure Access Control System (ACS) product functionality into the Cisco Identity Services Engine (ISE) product line.

The Cisco Identity Services Engine (ISE) product line is capable of integrating any Security appliance which can support Tacacs & Radius and similar kind of security polices can be created. Cisco will also offer a migration tool which is capable of migrating the Cisco Secure Access Control System rules into

Cisco Identity Services Engine (ISE). The migration tool uses the Cisco Secure ACS Programmatic Interface (PI) and the Cisco ISE representational state transfer (REST) application programming interfaces (APIs). The Cisco Secure ACS PI and the Cisco ISE REST APIs allow the Cisco Secure ACS and Cisco ISE applications to run on supported hardware platforms or VMware servers. One cannot directly run the migration tool on a Cisco Secure ACS appliance. The Cisco Secure ACS PI reads and returns the configuration data in a normalized form. The Cisco ISE REST APIs perform validation and normalize the exported Cisco Secure ACS data to persist it in a form usable by Cisco ISE software.

fig-1-1-acs-to-ise-migration

Cisco is offering up to 63% off on Cisco ISE hardware and software license bundles for those who want to migrate from Cisco ACS to Cisco ISE. However the customer with both ACS and ISE installations are not eligible for the migration bundles.

The below table shows the major milestones for the latest announcement.

Milestone Definition Date
End-of-Life Announcement Date The date the document that announces the end of sale and end of life of a product is distributed to the general public. November 30, 2016
End-of-Sale Date The last date to order the product through Cisco point-of-sale mechanisms. The product is no longer for sale after this date. August 30, 2017
Last Ship Date: 

App. SW, HW

The last-possible ship date that can be requested of Cisco and/or its contract manufacturers. Actual ship date is dependent on lead time. November 28, 2017
End of SW Maintenance Releases Date: 

App. SW, HW

The last date that Cisco Engineering may release any final software maintenance releases or bug fixes. After this date, Cisco Engineering will no longer develop, repair, maintain, or test the product software. August 30, 2018
End of Routine Failure Analysis Date: 

HW

The last-possible date a routine failure analysis may be performed to determine the cause of hardware product failure or defect. August 30, 2018
End of New Service Attachment Date: 

App. SW, HW

For equipment and software that is not covered by a service-and-support contract, this is the last date to order a new service-and-support contract or add the equipment and/or software to an existing service-and-support contract. August 30, 2018
End of Service Contract Renewal Date: 

HW

The last date to extend or renew a service contract for the product. November 25, 2021
End of Service Contract Renewal Date: 

App. SW

The last date to extend or renew a service contract for the product. November 26, 2019
Last Date of Support: App. SW The last date to receive applicable service and support for the product as entitled by active service contracts or by warranty terms and conditions. After this date, all support services for the product are unavailable, and the product becomes obsolete. August 31, 2020
Last Date of Support: 

HW

The last date to receive applicable service and support for the product as entitled by active service contracts or by warranty terms and conditions. After this date, all support services for the product are unavailable, and the product becomes obsolete. August 31, 2022

It’s a good approach from Cisco to push the flavor of Cisco Identity Services Engine (ISE) product towards their customer.


October 30, 2016  5:22 PM

Blue Coat Proxy SG Client Connection methods

Yasir Irfan Yasir Irfan Profile: Yasir Irfan
Networking

When Blue Coat Proxy SG is configured for internet in any of the mentioned deployment methods the client must need to establish connection with Blue Coat Proxy SG appliance.  A client uses either an explicit method or a transparent method to establish a connection.

Explicit Proxy:

In this method, a client browser is explicitly configured to forward all the request towards proxy. Usually the browser is configured with an IP address and the port number of the proxy service. One can use Group policies to push the configuration to browsers or can also use Proxy Auto-Configuration (PAC) file to configure the browser to proxy setting from a web server. Explicit proxying is the quickest and simplest proxy solution. However, this method does fit well for large organizations.

Transparent Proxy:

In this method, the client browser does not need any special configuration, neither the browser is aware of how the traffic is being processed by the proxy. The proxy intercepts the traffic and process it. Basically the traffic is directed to proxy SG by using techniques like PBR, WCCP or default route. This method is much easier to deploy and administrate as there no configuration needed at the client end.

Some of the best practice of Blue Coat proxy SG are

Inline is recommend for:

  • Small branch office with very limited scalable plan
  • For POC and short-term deployments

Virtually inline or out-of-path is recommended for:

  • Customers who are looking for scalability
  • Customers who are looking for high availability (redundancy)

Explicit proxy is recommended for:

  • Customers who wants to use extensive authentication

Transparent proxy is recommended for

  • Customers who want inline physical deployment.


Forgot Password

No problem! Submit your e-mail address below. We'll send you an e-mail containing your password.

Your password has been sent to: