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Knowledgebase
The Knowledgebase is a searchable database of technical questions and answers to troubleshoot a variety of issues. Compiled by the Barracuda Networks Technical Support team, this interactive tool is designed to be an easy way to solve technical issues.
Knowledgebase Articles (274)
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Why you have not to use a hashing algorithm with TINA VPN Tunnels
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Why the Control Center didn?t update the license for my remote box?
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Why won't my Avaya soft phone login while i'm connected to my VPN?
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Why is my firewall reporting a "Block Local Loop" on the Recent Connections page of my Barracuda Firewall?
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Why is the Barracuda NG Network Access Client reporting "Internal loop failed"?
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Why isn't my DC Agent synchronizing group membership information to my Barracuda NG Firewall?
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Why is the Barracuda NG Firewall Vx for VMWare unable to add more than 5 network interfaces?
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Why is email getting blocked by the Spam Filter even though I added the receipent to the whitelist?
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Why doesn't my DHCP service work on my Barracuda firewall?
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Why is my traffic being blocked with 'routing triangle' as the reason?
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Why is my dynamically assigned local ISP not working for the IPsec site to site VPN tunnel?
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Why isn't my DC Agent syncing users to my Barracuda Firewall?
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Why is my firewall still saying it needs to be activated even though I've completed the activation online?
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Why is my Barracuda NG Firewall reporting 'Critical System Condition' event with the new netfence XL series
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Why does "Disable FTP" lead to frequent proxy crashes on my Barracuda NG Firewall?
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Why can't I access servers deployed in Azure through a site-to-site VPN between a remote location and an NG Azure?
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Why can't I access servers deployed in Azure through a site-to-site VPN between a remote location and an NG Azure?
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Why does the ?Activation State? show ?Could not connect to HTTP proxy??
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Why am I having name resolution issues when connected over a VPN with the Barracuda NG Network Access Client?
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Which network card drivers support VLAN tagging?
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Which licenses are needed for the legacy phion policyserver?
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Why am I unable to access my SSL VPN page(or other service utilizing port 443 on a firewall?s server IP) despite everything being properly configured?
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Which ports does the administration tool NG Admin utilise?
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Why am I getting a '403 Unauthorized' message when establishing a support tunnel on a Barracuda Firewall?
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Where can I find more information about the design limitations of the NG Firewall 5.0.0 regarding software and hardware?
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When using ISDN Channel Bonding, the second channel is not always established correctly
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Where can I find the client settings for Wifi authentication via Radius EAP?
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Where can a Customer find a list of applications the NG firewall is currently detecting?
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When does routes of type 'throw-boot' introduced?
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When using the NG as the NTP server, why wont my devices sync with the NG after binding and interface for use with NTPd
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What does the Warning 'Max. workers (XX) limit hit' mean in CAS-log of antivirus-service?
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What is my Barracuda NG Firewall having trouble resolving URLs while using HTTP proxy?
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What does the Warning 'no route to NTP servers' mean after a Logical Check on CC-administered boxes?
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What licensing changes will be introduced with firmware 5.2.0 for my Barracuda NG Firewall ?
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What do the firewall history entries 'Rate Limit Exceeded' and 'Block Size Limit Exceeded' mean on the Barracuda NG Firewall?
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What can I do if the system and hardware time on my Barracuda NG firewall is becoming out of sync?
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Performance Tuning
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VPN server does not start and display error "Cannot create ktina socket"
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PPTP or L2TP with Windows Vista / Windows 7 doesn´t work
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vpn.exe crashes with a runtime error if hardcopy is installed and runs
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Using Custom Rule Sets with SpamAssassin
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Support archive types for the AVRIA virusscanner
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Requirements to distribute Intrusion Prevention System (IPS) patterns via central management
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Remote management tunnels over 'McAfee IntruShield' (IPS)
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On a legacy phion M3 appliance, port3 and port4 have a degraded performance, high latency or packet losses
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Performing an LDAP search at the command line interface
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Triggering AVIRA AntiVirus pattern update manually
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The proxy service is automatically shut down after a few seconds
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Remote management tunnel cannot be established
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Virtual Server IP is not pingable
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Secure Web Proxy problem with 'Client Certificate' based authentication
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The VPN server gateway is not reachable
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Some websites could not be displayed via the HTTP Proxy in phion legacy firmware
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Websites are directly reachable but not via the HTTP proxy
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Partition table errors on legacy phion appliances nf-240 / nf-850 with SDR
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VPN tunnel is established but traffic is not forwarded
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RAM and CPU usage tuning for small appliances
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The statistic collect does not work over a long period
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Passwords containing special characters may not work
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Using a USB stick size greater than 1GB for installation on IBM server systems
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phibsd cannot authenticate usernames involving umlauts or special chars in the display name
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Transparent SSL-VPN client
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Root partition increases up to 4GB
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Spelling of 'Umlaut Domain Names' in Barracuda NG firewall DNS-Server
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Users can't authenticate with RSA-ACE after a box update
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Training the spam filter on Lotus Notes 6.5
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PDF download in browser window does not work
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Virusscanner blocks archives which are not encrypted
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proxy crash with logged line 'Too many queued ntlmauthenticator requests'
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Primary group membership cannot be resolved with Phibs MSAD authentication
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SDR will not work on legacy netfence L appliances if module configuration is changed
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Requirements for a successful MS-CHAP domain join
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Virscan library error after update to firmware 4.2.5
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Remote management tunnel is not re-established automatically
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URL Filter does not block any pages
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The Barracuda NG Network Access Client continuously reconnects
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User does not match the Proventia Webfilter rules
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Spam-filter: Permission denied on /tmp/ folder
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The config node "Client 2 Site" generates an error and firewall rulesets can not be imported
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Tuning a F10 box to prevent memory allocation issues
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Skype blocking via HTTP-Proxy
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Single Sign On for the Xfirewall and NG Firewall VPN Client with MSAD
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Setting up VLANs permanently without failsafe or forced box network activation
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Receive output to screen even though output to the serial console is configured
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Proxy service does not bind to configured ip and port
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pppoe/pptp Dial-In user configuration (t-online)
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Tuning a box to a lower memory usage
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Standards for IPSec tunnel configuration between NG Firewall and 3rd party gateways
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Message 'Corrupted Data File' with ID 150 reported in the event viewer
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Message 'Connect Script Failed' reported at connecting to box via serial console
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NG Access Client 2.0 with 802.1x - general hints
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NG Access Client Health Agent still in state 'pending communication'
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Log message 'PAYLOAD_MALFORMED', 'INVALID_PAYLOAD_TYPE', 'INVALID_COOKIE' reported in ike.log
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Manual Root-CA import for the SSL Proxy engine
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MSAD authentication through phibsd experiences a timeout
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NG Access Client 2.0 with 802.1x - Cisco 2960 switch configuration example
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Native NTLM authentication does not work with Windows 2003 Server
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Log message 'All redirector processes are busy' reported in the in proxy.log
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Message 'TCP Header has an Invalid ACK Number' reported in firewall history
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Log message 'device [x] entered promiscuous mode' reported in klogd.log
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NG Access Client with 802.1x - Cisco 2960 - communication problems
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Log message 'ACPF clock' reported in klogd.log
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Meaning of 'DriveStatusError BadCRC' in klogd.log
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Java support in NG SSL VPN
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Java error on Windows 7 for SSLVPN when using Java engine jre 1.6.13
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MSCHAPv2 authentication issue with http-proxy (challenge response on update.microsoft.com)
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Log message "csum failure" reported in klogd.log
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Message 'TCP Packet Belongs to no Active Session' reported in the firewall history
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L2TP connetcion does not establish
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Log message 'Size limit exceeded' reported while retrieving CRLs
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MSAD Authentication doesn't work when the users access is restricted to a special client
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Log message kernel: dst cache overflow' reported in klogd.log
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MailGW HA-Sync error 'filename too long'
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Mounting a USB flashdisk on a Barracuda NG Firewall box
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Naming restrictions when using VLANs
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Message 'respawning too fast' reported on the command-line prompt
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Log message 'Clock skew' reported in cstatd.log
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Log message 'Disk space over limit' reported in the proxy cache.log
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Manual file system check in runlevel 1
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No download progress popup appears for a download from the microsoft download centre
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Log message 'quantum of class [n] is big' reported in klogd.log
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Log message 'Neighbour table overflow' reported in klogd.log
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Manual time synchronisation with NTP server fails
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Message 'Block Local Loop' reported in the firewall history
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Lock on /var/lib/rpm/Packages causes hotfix/patch installation failure
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Log message 'SMTP line limit reached' reported in the mailgateway.log
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Manual file system check with 'phion rescue'
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Log message 'Size limit exceeded' reported in the phibs.log
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Log message 'Unexpected EOF while reading body' and 'Broken pipe' reported in the cas.log
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MTU size problems in Microsoft Windows
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Manual file system check when system stops during the boot process
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Legacy phion appliances L2000 / M5 crash at activating of a 'Broadcom 582x' acceleration card
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How to test phibs authentication on a Barracuda NG Firewall box?
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Installing CCISS Machines with a USB-Stick
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IPSEC Site to Site Tunnels with Checkpoint and multiple subnets
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Incompatibility between Vodafone Mobile Connect and Barracuda NG Network Access Client
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IPSEC problems with Checkpoint RG55 and higher
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How to install a legacy phion VPN-Pool license
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HTTP Proxy does not display the correct logo within HTTP error pages
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How to enable remote management access to the NG Firewall from the Internet
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Installing a lagcy netfence gateway using an USB-floppy disk
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How to delete the event database (event.db) on CC-administered boxes
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Howto install legacy netfence on 'VMware ESX' server
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How to configure Traffic Shaping for the HTTP Proxy Service
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How to configure Barracuda NG Firewall for in the cloud scanning on Barracuda Web Security Flex
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Indicate firewall rule usage in CC firewall rulesets
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How to get mails through the POP3 engine from the mailgateway
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IPSEC tunnel between Windows ISA und NG Firewall is up but no traffic is routed through
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How to use TOS-Bit values on Barraucda NG Firewall?
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How to use the ACL Type groups with MSAD
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How to test read performance for harddisk
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How To enable debug logging for NG Access Client
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Installation of NG firewall 5.0.x on HP G6 servers fails
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How to configure policy-routing for multi-provider useage
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How to install Barracuda NG Firewall 4.2.x on a HP DL-Server with a 'SmartArray' controller
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Installing Barracuda NG Firewall 4.2.x on an outmoded Compaq Hardware
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How to schedule PAR file creation?
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How to import a PAR file at the command line interface
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How to re-schedule dropped/giveup mails
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Interpretation of CPU average load values ("Control" > "Processes")
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How to use the Barracuda NG Network Access Client together with a 3rd party VPN client
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Installing CCISS Machines with a USB-Floppy
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How to restore a PAR file from a different NG model and version?
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IPSEC Tunnel between Barracuda NG Firewall and Checkpoint NGX R65 does not establish
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How to install a legacy phion 'VIRSCAN' license file
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How to debug Barracuda NG Network Access Client installation?
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How to constrain DHCP leases only to clients running NG Access Client
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How to enable debug logging for DNS service
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Huge log files respectively problems with log-viewer
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How to get the BIOS version for Barracuda NG Firewall and phion legacy appliances?
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IPSec-tunnel disappears from configuration after editing a tunnel
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How to provide more GDI object handles for NG Admin
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How to install and activate reissued legacy phion licenses and add-licenses
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Instable PPTP connections
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How to add the Barracuda RBL to the NG Firewall SPAM filter (spamassassin)
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How to bypass proxy authentication for Java applications
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How to a RSA-ACE Server to authenticate with a Barracuda NG firewall
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How to activate debugging for OSPF?
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How to activate the Emergency Quarantine Mode if no network connection is available
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How to activate an 'ADD-FW' legacy phion license
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How to activate a legacy phion 'NF-BOB' license
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How to check system architecture?
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How to access the BIOS of Heavensgate Appliances
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How to configure Alternative HA IP and private uplink
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How should I upgrade the firmware on my Barracuda NG Firewall?
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How to check the proxy configuration for errors
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How do I use an SIP VoIP system through the Barracuda NG Firewall?
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How do you install license keys on a new Barracuda NG Firewall?
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How do I retrieve the Barracuda NG Firewall MIB file for SNMP monitoring?
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How do I know if my forwarding firewall ruleset is at the current version?
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How do I create an IPS report from my NGFW?
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How do I create a System Report containing logs and a backup configuration file?
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How do I increase IPSEC log levels to troubleshoot a client-to-site or site-to-site VPN tunnel?
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How do I configure customized http and https ports for HTTP proxy on the Barracuda NG Firewall?
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How can support set up Client to Site VPN on NextGen Firewall F-Series with username and password authentication
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How can I enable KDump (Kernel Logging) for extended crash monitoring/reporting on the NG firewall?
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How can I make the VPN Client installed on CentOS 7 establish a connection automatically on boot?
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How can I import and use external IPv4 address information with my Barracuda NG Firewall?
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Host Firewall does not start after Patch / Hotfix update
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How can a customer create a SHA-256 certificate or certificate signing request
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How can I change the administrator password on my Barracuda Firewall?
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CLI commands for USB UMTS modems
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Erroneous encryption of VPN packets with enabled VIA PadLock Security Engine
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Connectivity problems as soon as Barracuda NG Access Client is installed
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Custom cronjob does not work
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Driver options for sk98lin module (Crossbeam, SysKonnect)
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Driver options for 3c59x module (3Com Cards)
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Debugging for IPSec
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Driver options for Realtek network adapters
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Configuring a dynamic UDP Outgoing Address on the HTTP proxy
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CC HA-Sync in 'Dirty Sync State'
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DHCP relay is in status started but it does not work
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Closing old admin sessions.
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Connection to the Events monitoring GUI with NG Admin is refused
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Configuration of Selective Syslog Streaming by means of Logdata Filters
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Eventing Service notifications cannot be delivered by Microsoft Exchange Server
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Control Centre statistic HA sync cannot be processed
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Description of IPSEC tunnel termination methods
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Driver options for e1000, e1000compaq module (Intel Pro/1000 Cards)
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DHCP service is in status started but it does not work
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Dynamic networks (DHCP, ADSL) are not re-established automatically
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Configuring SPAM filter training with German MS-Exchange Server
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Concurrent NAT connections to Microsoft Windows 2000 Server are not possible
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Does the NG Firewall support 'Multinetting' on a single device?
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Driver options for eepro100 module (Intel Pro/100 Cards)
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Event, log, and statistic daemons do not start anymore
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Dynamic network start and stop scripts for Monitoring-Server
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Files appear to download very slowly, and may finish only being a few kilobytes big
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DNS server settings are not updated automatically
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Deleted boxes does not disappear in the MC status map
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Configuration and entegra update on phion-M appliances
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Dirty Release of phionnet_boxmisc package on flashboxes
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Driver options for e100, e100compaq module (Intel Pro/100 Cards)
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Destroyed inittab file
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Config sessions are not shown in the Control sessions overview
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Customize phase1 in IPSec-tunnels
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Config HA-Sync or Rangetree HA-Sync stops with 'Authentication Failed'
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Dirty HA Sync
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FTP server connection fails trough http proxy to some FTP servers
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Flush dynamic dns peer entries for IPSEC tunnels
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ESP VPN Tunnel does not work correctly
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Driver options for bcm5700 module (Broadcom Gigabit Cards)
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Errors on Windows server systems due to an unspecified "Master Browser"
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Connecting to the box via serial console is not possible
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Deleting old entries in scanner versions tab is not possible
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Box freezes at start-up displaying the message 'freeing unused kernel'
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Box uses old remote management tunnel 'VPN Point of Entry' IP after change
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boxfw crash with 'Request handler got signal 25'
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Box License in 'Grace Mode' with Status 'Parent License not found'
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Barracuda NG Firewall IPSec implementation and PFS
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Barracuda NG Network Access Client triggers status messages 'dhcp waiting' / 'receiving configuration'
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Barracuda NG Network Access Client connection does not establish because 'Firewall Status mismatch'
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Barracuda NG Firewall 4.2.x installation breaks on 'VMware ESX' server
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Barracuda Web Filter license activation failed
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Barracuda NG Firewall bootloader stops at 'LI'
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Barracuda NG Network Access Client could not connect
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Barracuda NextGen Firewall F-Series EOS and EOL
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Barracuda NG Network Access Client authentication with X.509 certificates and eToken / SmartCard does not work
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Barracuda NG Network Access Client with eToken authentication
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Barracuda NG Access Client displays "phionHADlg.exe" with error code 0x0000142 continuously
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Barracuda NG Control Centre event interface does not show events generated on the CC box
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Barracuda NG Control Centre event interface does not show events from remote administrated NG Firewall gateways
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'Control' > 'Processes' displays only 768MB RAM
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Activation of HA Barracuda NG Firewall
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After box reboot ISDN is not opened though DSL is unavailable
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"Unresolvable clock skew detected" error in dstatm logfile
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Adobe updater clients consum complete download bandwith if update is triggered over phion HTTP proxy
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'Public Folders' can't be accessed via IMAP on a 'Microsoft Exchange 2007'server
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A 'redirect rule' doesn't work with 'DNS network' objects or netw. objects which has more than 1 IP
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'Firewall Authentication' via HTTPs does not work
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After a shutdown/hardreboot, Amazon WAF VM instance shows as ?Terminated?
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'Custom Template Logo' is not shown in the download progress popup
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Antivirus file descriptors are increasing when using the HTTP-proxy
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'Global Append Options' are not activated