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You can use the Firewall screen to configure which web traffic can (or cannot) access your virtual machine or server.

Each entry in the table represents a single rule that allows or blocks web traffic from accessing your virtual machine or server. Within a single rule, you can configure several IP addresses or just a single IP address. 

You can combine related IP addresses into an IP Group. For example, if you want to block traffic from three separate IP addresses, you do not have to create three separate firewall rules. Instead, you can combine the three separate IP addresses into a single, configurable IP Group. Then, when you create a firewall rule, you can pick the newly created IP Group as your Source. You can use the same practice for Destination IP addresses. For more information, see Create an IP group

Similar to an IP Group, you can create a Service Group to combine similar port requirements. 

To fully use this screen, you must have the following permissions assigned to your account:

  • Read Firewall
  • Read Virtual Data Centers
  • Write Entity Meta Data

  • Read Entity Meta Data


In the Firewall Rules screen, each firewall rule entry contains the following information: 

ColumnDescription
Rule

You can place firewall rules in a specific order as a way to further filter traffic. Traffic will be tested against each firewall rule, starting with the firewall rule in the top position, followed by the next firewall rule. As a result, Armor recommends that generic rules be placed at the top of the table, with more specific rules towards the bottom of the table.

For example, if you have two firewall rules, incoming traffic will be tested against the first rule (the rule in the top position). If the traffic passes the first firewall rule, then the traffic will be tested against the second firewall. If the traffic passes the second firewall rule, then the traffic will be allowed to access your site.

In another example, if traffic does not pass the first firewall rule (the rule in the top position), then the traffic will be blocked, even without being tested against the second firewall rule.


You cannot change the order of a disabled rule.

Each page in the Firewall screen only lists 25 rules. If you have more than 25 rules, these additional rules will be placed in another page within the Firewall screen. To learn how to reorder and move these additional rules into a different page, see Reorder a firewall rule.

If you are not familiar with how to order firewall rules, Armor recommends that you send a support ticket for assistance. The order of firewall rules is very important to properly filter undesired traffic.

To learn how to send a support ticket, see Armor Support.

NameThis column displays the descriptive name of the firewall rule.
ActionThis column displays if the firewall rule is configured to Allow or Block web traffic to the Destination.
Source

This column displays the IP Group that contains the Source IP address (or addresses). The Source IP address is the starting point for the web traffic that you want to allow or block. This can be an IP address, an IP address range, or a CIDR.

Each Source IP address must be associated with an IP Group. An IP Group can contain one IP address or several IP addresses.

Destination

This column displays the IP Group that contains the Destination IP address (or addresses). The Destination IP address is the server or virtual machine that you want to protect. This can be an IP address, an IP address range, or a CIDR.

Each Destination IP address must be associated with an IP Group. An IP Group can contain one IP address or several IP addresses.

ServicesThis column displays the type of protocol for the configured ports in the firewall rule.
Status

This column displays the status of the firewall rule:

  • Enabled indicates that the firewall rule has been enabled.
  • Disabled indicates that the firewall rule has been disabled.
  • Pending indicates that the firewall rule is waiting to be enabled.
  • Error indicates that the firewall rule has encountered an error.


Review Supported Services and Sub-Protocols


Supported services or sub-protocolsListNotesExample
Services
  • TCP
  • UDP
  • ORACLE_TNS
  • FTP
  • SUN_RPC_TCP
  • SUN_RPC_UDP
  • MS_RPC_TCP
  • MS_RPC_UDP
  • NBNS_BROADCAST
  • NBDG_BROADCAST
  • L2_OTHERS
    • This service requires a hexadecimal subprotocol, such as: L2_OTHERS/0x814c
  • L3_OTHERS
  • These services are not case-sensitive.
  • You must enter a port number.
  • TCP/80 
  • udp/40
  • Tcp/80
  • udP/40
Additional services
  • AARP
  • AH
  • ARP
  • ATALK
  • ATMFATE
  • ATMMPOA
  • BPQ
  • CUST
  • DEC
  • DIAG
  • DNA_DL
  • DNA_RC
  • DNA_RT
  • ESP
  • FR_ARP
  • GRE
  • IEEE_802_1Q
  • IGMP
  • IPCOMP
  • IPV4
  • IPV6
  • IPV6FRAG
  • IPV6ICMP
  • IPV6NONXT
  • IPV6OPTS
  • IPV6ROUTE
  • IPX
  • L2TP
  • LAT
  • LLC
  • LOOP
  • NETBEUI
  • PPP
  • PPP_DISC
  • PPP_SES
  • RARP
  • RAW_FR
  • RSVP
  • SCA
  • SCTP
  • TEB
  • X25
  • These additional services are not case-sensitive. 
  • Do not enter a port number with these additional services.

  • AARP
  • aarp
  • Aarp
Sub-protocols
  • echo-reply
  • destination-unreachable
  • source-quench
  • redirect
  • echo-request
  • router-advertisement
  • router-solicitation
  • time-exceeded
  • parameter-problem
  • timestamp-request
  • timestamp-reply
  • address-mask-request
  • address-mask-reply
  • network-unreachable
  • host-unreachable
  • protocol-unreachable
  • port-unreachable
  • fragmentation-needed
  • source-routing-failed
  • destination-network-unknown
  • destination-host-unknown
  • source-host-isolated
  • destination-network-prohibited
  • destination-host-prohibited
  • network-unreachable-tos
  • host-unreachable-tos
  • communication-prohibited
  • redirect-network
  • redirect-host
  • redirect-tos-network
  • redirect-tos-host
  • ttl-zero-transit
  • ttl-zero-reassembly
  • pointer-to-error
  • options-missing
  • bad-length
  • You can use these sub-protocols to communicate an error message to a user who attempts to access your site.
  • Do not enter a port number.
  • You must enter icmp, followed by the specific sub-protocol.
  • You must enter the sub-protocol in lower-case letters.
  • icmp/destination-unreachable
  • icmp/time-exceeded

Troubleshooting

For rules or groups in an Error state, you can click Retry to troubleshoot the issue. You can only click Retry once. If this action does not resolve the issue, then you must contact Support. 



Related Documentation




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