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Extended ACL Configuration Mode Commands
To create and modify extended access lists on a WAAS device for controlling access to interfaces or
applications, use the ip access-list extended global configuration command. To disable an extended
access list, use the no form of the command.
ip access-list extended {acl-name | acl-num}
Syntax Description
Defaults An access list drops all packets unless you configure at least one permit entry.
Command Modes Global configuration
Device Modes application-accelerator
central-manager
Usage Guidelines Use access lists to control access to specific applications or interfaces on a WAAS device. An access
control list consists of one or more condition entries that specify the kind of packets that the WAAS
device will drop or accept for further processing. The WAAS device applies each entry in the order in
which it occurs in the access list, which by default is the order in which you configured the entry.
The following list contains examples of how ACLs can be used in environments that use WAAS devices:
• A WAAS device resides on the customer premises and is managed by a service provider, and the
service provider wants to secure the device for its management only.
• A WAAS device is deployed anywhere within the enterprise. As with routers and switches, the
administrator wants to limit Telnet, SSH, and WAAS GUI access to the IT source subnets.
extended Enables extended ACL configuration mode. The CLI enters the extended
ACL configuration mode in which all subsequent commands apply to the
current extended access list. The (config-ext-nacl) prompt appears:
WAE(config-ext-nacl)#
acl-name Access list to which all commands entered from ACL configuration mode
apply, using an alphanumeric string of up to 30 characters, beginning with
a letter.
acl-num Access list to which all commands entered from access list configuration
mode apply, using a numeric identifier. For extended access lists, the valid
range is 100 to 199.
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• An application layer proxy firewall with a hardened outside interface has no ports exposed.
(Hardened means that the interface carefully restricts which ports are available for access, primarily
for security reasons. With an outside interface, many types of security attacks are possible.) The
WAE's outside address is Internet global, and its inside address is private. The inside interface has
an ACL to limit Telnet, SSH, and WAAS GUI access to the device.
• A WAAS device using WCCP is positioned between a firewall and an Internet router or a subnet off
the Internet router. Both the WAAS device and the router must have ACLs.
Note ACLs that are defined on a router take precedence over the ACLs that are defined on the WAE. ACLs
that are defined on a WAE take precedence over the WAAS application definition policies that are
defined on the WAE.
Within ACL configuration mode, you can use the editing commands (list, delete, and move) to display
the current condition entries, to delete a specific entry, or to change the order in which the entries will
be evaluated. To return to global configuration mode, enter exit at the ACL configuration mode prompt.
To create an entry, use a deny or permit keyword and specify the type of packets that you want the
WAAS device to drop or to accept for further processing. By default, an access list denies everything
because the list is terminated by an implicit deny any entry. Therefore, you must include at least one
permit entry to create a valid access list.
After creating an access list, you can include the access list in an access group using the access-group
command, which determines how the access list is applied. You can also apply the access list to a specific
application using the appropriate command. A reference to an access list that does not exist is the
equivalent of a permit any condition statement.
To create an extended access list, enter the ip access-list extended global configuration command.
Identify the new or existing access list with a name up to 30 characters long beginning with a letter, or
with a number. If you use a number to identify an extended access list, it must be from 100 to 199
Note You must use a standard access list for providing access to the SNMP server or to the TFTP
gateway/server. However, you can use either a standard access list or an extended access list for
providing access to the WCCP application.
To allow connections from a specific host, use the permit host source-ip option and replace source-ip
with the IP address of the specific host.
To allow connections from a specific network, use the permit host source-ip wildcard option. Replace
source-ip with a network ID or the IP address of any host on the network that you want to specify.
Replace wildcard with the dotted decimal notation for a mask that is the reverse of a subnet mask, where
a 0 indicates a position that must be matched and a 1 indicates a position that does not matter. For
instance, the wildcard 0.0.0.255 causes the last eight bits in the source IP address to be ignored.
Therefore, the permit 192.168.1.0 0.0.0.255 entry allows access from any host on the 192.168.1.0
network.
After you identify the extended access list, the CLI enters the extended ACL configuration mode and all
subsequent commands apply to the specified access list.
WAE(config)# ip access-list extended testextacl
WAE(config-ext-nacl)#
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Examples The following commands create an access list on the WAAS device. You create this access list to allow
the WAAS device to accept all web traffic that is redirected to it, but limits host administrative access
using SSH:
WAE(config)# ip access-list extended testextacl
WAE(config-ext-nacl)# permit tcp any any eq www
WAE(config-ext-nacl)# permit tcp host 10.1.1.5 any eq ssh
WAE(config-ext-nacl)# exit
The following commands activate the access list for an interface:
WAE(config)# interface gigabitethernet 1/0
WAE(config-if)# ip access-group testextacl in
WAE(config-if)# exit
The following example shows how this configuration appears when you enter the show
running-configuration command:
...
!
interface GigabitEthernet 1/0
ip address 10.1.1.50 255.255.0.0
ip access-group testextacl in
exit
. . .
ip access-list extended testextacl
permit tcp any any eq www
permit tcp host 10.1.1.5 any eq ssh
exit
. . .
Related Commands clear
show ip access-list
(config-if) ip access-group
(config-ext-nacl) deny
(config-ext-nacl) delete
(config-ext-nacl) list
(config-ext-nacl) move
(config-ext-nacl) permit
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(config-ext-nacl) delete
(config-ext-nacl) delete
To delete a line from the extended ACL, use the delete command.
delete line-num
Syntax Description
Command Modes Extended ACL configuration mode
Device Modes application-accelerator
central-manager
Examples The following example deletes line 10 from the extended ACL testextacl.
WAE(config)# ip access-list extended testextacl
WAE(config-ext-nacl)# delete 10
Related Commands (config-ext-nacl) list
(config-ext-nacl) move
delete Deletes the specified entry.
line-num Identifies the entry at a specific line number in the access list.
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(config-ext-nacl) deny
(config-ext-nacl) deny
To add a line to an extended access-list that specifies the type of packets that you want the WAAS device
to drop, use the deny command. To add a condition to the extended ACL, note that the options depend
on the chosen protocol.
For IP, use the following syntax to add a condition:
[insert line-num] deny {gre | icmp | tcp | udp | ip | proto-num} {source-ip [wildcard] | host
source-ip | any} {dest-ip [wildcard] | host dest-ip | any}
no deny {gre | icmp | tcp | udp | ip | proto-num} {source-ip [wildcard] | host source-ip | any}
{dest-ip [wildcard] | host dest-
ip | any}
For TCP, use the following syntax to add a condition:
[insert line-num] deny tcp {source-ip [wildcard] | host source-ip | any} [operator port [port]]
{dest-ip [wildcard] | host dest-ip | any} [operator port [port]] [established]
no deny tcp {source-ip [wildcard] | host source-ip | any} [operator port [port]] {dest-ip [wildcard]
| host dest-ip
| any} [operator port [port]] [established]
For UDP, use the following syntax to add a condition:
[insert line-num] deny udp {source-ip [wildcard] | host source-ip | any} [operator port [port]]
{dest-ip [wildcard] | host dest-ip | any} [operator port [port]]
no deny udp {source-ip [wildcard] | host source-ip | any} [operator port [port]] {dest-ip [wildcard]
| host dest
-ip | any} [operator port [port]]
For ICMP, use the following syntax to add a condition:
[insert line-num] deny icmp {source-ip [wildcard] | host source-ip | any} {dest-ip [wildcard] | host
dest-ip | any} [icmp-type [code] | icmp-msg]
no deny icmp {source-ip [wildcard] | host source-ip | any} {dest-ip [wildcard] | host dest-ip | any}
[icmp-type [code] | icmp-msg
]
Syntax Description insert (Optional) Inserts the conditions following the specified line number into
the access list.
line-num Identifies the entry at a specific line number in the access list.
deny Causes packets that match the specified conditions to be dropped.
source-ip Source IP address. The number of the network or host from which the
packet is being sent, specified as a 32-bit quantity in 4-part dotted-decimal
format (for example, 0.0.0.0).
wildcard (Optional) Portions of the preceding IP address to match, expressed using
4-digit, dotted-decimal notation. Bits to match are identified by a digital
value of 0; bits to ignore are identified by a 1.
Note For standard IP ACLs, the wildcard parameter of the ip access-list
command is always optional. If the host keyword is specified for a
standard IP ACL, then the wildcard parameter is not allowed.
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(config-ext-nacl) deny
Defaults An access list drops all packets unless you configure at least one permit entry.
Command Modes Extended ACL configuration mode
Device Modes application-accelerator
central-manager
Usage Guidelines To create an entry, use a deny or permit keyword and specify the type of packets that you want the
WAAS device to drop or to accept for further processing. By default, an access list denies everything
because the list is terminated by an implicit deny any entry. Therefore, you must include at least one
permit entry to create a valid access list.
To allow connections from a specific host, use the permit host source-ip option and replace source-ip
with the IP address of the specific host.
host Matches the following IP address.
any Matches any IP address.
gre Matches packets using the Generic Routing Encapsulation protocol.
ip Matches all IP packets.
proto-num (Optional) IP protocol number.
tcp Matches packets using the TCP protocol.
udp Matches packets using the UDP protocol.
operator (Optional) Operator to use with specified ports, where lt = less than, gt =
greater than, eq = equal to, neq = not equal to, and range = an inclusive
range.
port (Optional) Port, using a number (0–65535) or a keyword; 2 port numbers
are required with range. See the Usage Guidelines section for a listing of
the UDP and TCP keywords.
dest-ip Destination IP address. The number of the network or host to which the
packet is being sent, specified as a 32-bit quantity in 4-part dotted decimal
format (for example, 0.0.0.0).
established (Optional) Matches TCP packets with the acknowledgment or reset bits set.
icmp Matches ICMP packets.
icmp-type (Optional) Matches by ICMP message type (0–255).
code (Optional) Used with icmp-type to further match by ICMP code type
(0–255).
icmp-msg (Optional) Matches by a combination of ICMP message type and code
types, as expressed by the keywords shown in the Usage Guidelines section.
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(config-ext-nacl) deny
To allow connections from a specific network, use the permit host source-ip wildcard option. Replace
source-ip with a network ID or the IP address of any host on the network that you want to specify.
Replace wildcard with the dotted decimal notation for a mask that is the reverse of a subnet mask, where
a 0 indicates a position that must be matched and a 1 indicates a position that does not matter. For
instance, the wildcard 0.0.0.255 causes the last eight bits in the source IP address to be ignored.
Therefore, the permit 192.168.1.0 0.0.0.255 entry allows access from any host on the 192.168.1.0
network.
For extended IP ACLs, the wildcard parameter is required if the host keyword is not specified.
Use an extended access list to control connections based on the destination IP address or based on the
protocol type. You can combine these conditions with information about the source IP address to create
more restrictive condition.
The following table lists the UDP keywords that you can use with extended access lists.
The following table lists the TCP keywords that you can use with extended access lists.
CLI UDP Keyword Description UDP Port Number
bootpc Bootstrap Protocol (BOOTP) client 68
bootps Bootstrap Protocol (BOOTP) server 67
domain Domain Name System (DNS) 53
mms Microsoft Media Server 1755
netbios-dgm NetBIOS datagram service 138
netbios-ns NetBIOS name service 137
netbios-ss NetBIOS session service 139
nfs Network File System service 2049
ntp Network Time Protocol 123
snmp Simple Network Management Protocol 161
snmptrap SNMP traps 162
tacacs Terminal Access Controller Access Control
System
49
tftp Trivial File Transfer Protocol 69
wccp Web Cache Communication Protocol 2048
CLI TCP Keyword Description TCP Port Number
domain Domain Name System 53
exec Exec (rcp) 512
ftp File Transfer Protocol 21
ftp-data FTP data connections (used infrequently) 20
https Secure HTTP 443
mms Microsoft Media Server 1755
nfs Network File System service 2049
ssh Secure Shell login 22
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(config-ext-nacl) deny
The following table lists the keywords that you can use to match specific ICMP message types and codes.
Examples The following commands create an access list on the WAAS device. You create this access list to allow
the WAAS device to accept all web traffic that is redirected to it, but limits host administrative access
using SSH:
WAE(config)# ip access-list extended testextacl
WAE(config-ext-nacl)# permit tcp any any eq www
WAE(config-ext-nacl)# deny tcp host 10.1.1.5 any eq ssh
WAE(config-ext-nacl)# exit
The following commands activate the access list for an interface:
WAE(config)# interface gigabitethernet 1/0
WAE(config-if)# ip access-group extended testextacl in
WAE(config-if)# exit
tacacs Terminal Access Controller Access Control
System
49
telnet Telnet 23
www World Wide Web (HTTP) 80
CLI TCP Keyword Description TCP Port Number
administratively-prohibited alternate-address conversion-error
dod-host-prohibited dod-net-prohibited echo
echo-reply general-parameter-problem host-isolated
host-precedence-unreachable host-redirect host-tos-redirect
host-tos-unreachable host-unknown host-unreachable
information-reply information-request mask-reply
mask-request mobile-redirect net-redirect
net-tos-redirect net-tos-unreachable net-unreachable
network-unknown no-room-for-option option-missing
packet-too-big parameter-problem port-unreachable
precedence-unreachable protocol-unreachable reassembly-timeout
redirect router-advertisement router-solicitation
source-quench source-route-failed time-exceeded
timestamp-reply timestamp-request traceroute
ttl-exceeded unreachable
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(config-ext-nacl) deny
The following example shows how this configuration appears when you enter the show
running-configuration command:
...
!
interface GigabitEthernet 1/0
ip address 10.1.1.50 255.255.0.0
ip access-group extended testextacl in
exit
. . .
ip access-list extended testextacl
permit tcp any any eq www
permit tcp host 10.1.1.5 any eq ssh
exit
. . .
Related Commands (config-ext-nacl) delete
(config-ext-nacl) list
(config-ext-nacl) move
(config-ext-nacl) permit
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(config-ext-nacl) exit
(config-ext-nacl) exit
To terminate extended ACL configuration mode and return to the global configuration mode, use the exit
command.
exit
Syntax Description This command has no arguments or keywords.
Defaults No default behavior or values
Command Modes All modes
Device Modes application-accelerator
central-manager
Examples The following example terminates extended ACL configuration mode and returns to global configuration
mode:
WAE(config-ext-nacl)# exit
WAE(config)#
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(config-ext-nacl) list
(config-ext-nacl) list
To display a list of specified entries within the extended ACL, use the list command.
list [start-line-num [end-line-num]]
Syntax Description
Command Modes Extended ACL configuration mode
Device Modes application-accelerator
central-manager
Examples The following example displays a list of specified entries within the extended ACL.
WAE(config)# ip access-list extended testextacl
WAE(config-ext-nacl)# list 25 50
Related Commands (config-ext-nacl) delete
(config-ext-nacl) move
list Lists the specified entries (or all entries when none are specified).
start-line-num Line number from which the list begins.
end-line-num (Optional) Last line number in the list.
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(config-ext-nacl) move
(config-ext-nacl) move
To move a line to a new position within the extended ACL, use the move command.
move old-line-num new-line-num
Syntax Description
Command Modes Extended ACL configuration mode
Device Modes application-accelerator
central-manager
Examples The following example moves a line to a new position within the extended ACL.
WAE(config)# ip access-list extended testextacl
WAE(config-ext-nacl)# move 25 30
Related Commands (config-ext-nacl) delete
(config-ext-nacl) list
move Moves the specified entry in the access list to a new position in the list.
old-line-num Line number of the entry to move.
new-line-num New position of the entry. The existing entry is moved to the following
position in the access list.
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(config-ext-nacl) permit
(config-ext-nacl) permit
To add a line to an extended access-list that specifies the type of packets that you want the WAAS device
to accept for further processing, use the permit command. To add a condition to the extended ACL, note
that the options depend on the chosen protocol.
For IP, use the following syntax to add a condition:
[insert line-num] permit {gre | icmp | tcp | udp | ip | proto-num} {source-ip [wildcard] | host
source-ip | any} {dest-ip [wildcard] | host dest-ip | any}
no permit {gre | icmp | tcp | udp | ip | proto-num} {source-ip [wildcard] | host source-ip | any}
{dest-ip [wildcard] | host dest-
ip | any}
For TCP, use the following syntax to add a condition:
[insert line-num] permit tcp {source-ip [wildcard] | host source-ip | any} [operator port [port]]
{dest-ip [wildcard] | host dest-ip | any} [operator port [port]] [established]
no permit tcp {source-ip [wildcard] | host source-ip | any} [operator port [port]] {dest-ip
[wildcard] | host dest-
ip | any} [operator port [port]] [established]
For UDP, use the following syntax to add a condition:
[insert line-num] permit udp {source-ip [wildcard] | host source-ip | any} [operator port [port]]
{dest-ip [wildcard] | host dest-ip | any} [operator port [port]]
no permit udp {source-ip [wildcard] | host source-ip | any} [operator port [port]] {dest-ip
[
wildcard] | host dest-ip | any} [operator port [port]]
For ICMP, use the following syntax to add a condition:
[insert line-num] permit icmp {source-ip [wildcard] | host source-ip | any} {dest-ip [wildcard] |
host dest-ip | any} [icmp-type [code] | icmp-msg]
no permit icmp {source-ip [wildcard] | host source-ip | any} {dest-ip [wildcard] | host dest-ip |
any} [icmp-type [code] | icmp-msg]
Syntax Description insert (Optional) Inserts the conditions following the specified line number into
the access list.
line-num Identifies the entry at a specific line number in the access list.
permit Causes packets that match the specified conditions to be accepted for
further processing.
source-ip Source IP address. The number of the network or host from which the
packet is being sent, specified as a 32-bit quantity in 4-part dotted-decimal
format (for example, 0.0.0.0).
wildcard (Optional) Portions of the preceding IP address to match, expressed using
4-digit, dotted-decimal notation. Bits to match are identified by a digital
value of 0; bits to ignore are identified by a 1.
Note For standard IP ACLs, the wildcard parameter of the ip access-list
command is always optional. If the host keyword is specified for a
standard IP ACL, then the wildcard parameter is not allowed.
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(config-ext-nacl) permit
Defaults An access list drops all packets unless you configure at least one permit entry.
Command Modes Extended ACL configuration mode
Device Modes application-accelerator
central-manager
Usage Guidelines To create an entry, use a deny or permit keyword and specify the type of packets that you want the
WAAS device to drop or to accept for further processing. By default, an access list denies everything
because the list is terminated by an implicit deny any entry. Therefore, you must include at least one
permit entry to create a valid access list.
To allow connections from a specific host, use the permit host source-ip option and replace source-ip
with the IP address of the specific host.
To allow connections from a specific network, use the permit host source-ip wildcard option. Replace
source-ip with a network ID or the IP address of any host on the network that you want to specify.
Replace wildcard with the dotted decimal notation for a mask that is the reverse of a subnet mask, where
a 0 indicates a position that must be matched and a 1 indicates a position that does not matter. For
host Matches the following IP address.
any Matches any IP address.
gre Matches packets using the Generic Routing Encapsulation protocol.
ip Matches all IP packets.
proto-num (Optional) IP protocol number.
tcp Matches packets using the TCP protocol.
udp Matches packets using the UDP protocol.
operator (Optional) Operator to use with specified ports, where lt = less than, gt =
greater than, eq = equal to, neq = not equal to, and range = an inclusive
range.
port (Optional) Port, using a number (0–65535) or a keyword; 2 port numbers
are required with range. See the Usage Guidelines section for a listing of
the UDP and TCP keywords.
dest-ip Destination IP address. The number of the network or host to which the
packet is being sent, specified as a 32-bit quantity in 4-part dotted decimal
format (for example, 0.0.0.0).
established (Optional) Matches TCP packets with the acknowledgment or reset bits set.
icmp Matches ICMP packets.
icmp-type (Optional) Matches by ICMP message type (0–255).
code (Optional) Used with icmp-type to further match by ICMP code type
(0–255).
icmp-msg (Optional) Matches by a combination of ICMP message type and code
types, as expressed by the keywords shown in the Usage Guidelines section.
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(config-ext-nacl) permit
instance, the wildcard 0.0.0.255 causes the last eight bits in the source IP address to be ignored.
Therefore, the permit 192.168.1.0 0.0.0.255 entry allows access from any host on the 192.168.1.0
network.
For extended IP ACLs, the wildcard parameter is required if the host keyword is not specified.
Use an extended access list to control connections based on the destination IP address or based on the
protocol type. You can combine these conditions with information about the source IP address to create
more restrictive condition.
The following table lists the UDP keywords that you can use with extended access lists.
The following table lists the TCP keywords that you can use with extended access lists.
CLI UDP Keyword Description UDP Port Number
bootpc Bootstrap Protocol (BOOTP) client 68
bootps Bootstrap Protocol (BOOTP) server 67
domain Domain Name System (DNS) 53
mms Microsoft Media Server 1755
netbios-dgm NetBIOS datagram service 138
netbios-ns NetBIOS name service 137
netbios-ss NetBIOS session service 139
nfs Network File System service 2049
ntp Network Time Protocol 123
snmp Simple Network Management Protocol 161
snmptrap SNMP traps 162
tacacs Terminal Access Controller Access Control
System
49
tftp Trivial File Transfer Protocol 69
wccp Web Cache Communication Protocol 2048
CLI TCP Keyword Description TCP Port Number
domain Domain Name System 53
exec Exec (rcp) 512
ftp File Transfer Protocol 21
ftp-data FTP data connections (used infrequently) 20
https Secure HTTP 443
mms Microsoft Media Server 1755
nfs Network File System service 2049
ssh Secure Shell login 22
tacacs Terminal Access Controller Access Control
System
49
telnet Telnet 23
www World Wide Web (HTTP) 80
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(config-ext-nacl) permit
The following table lists the keywords that you can use to match specific ICMP message types and codes.
Examples The following commands create an access list on the WAAS device. You create this access list to allow
the WAAS device to accept all web traffic that is redirected to it, but limits host administrative access
using SSH:
WAE(config)# ip access-list extended testextacl
WAE(config-ext-nacl)# permit tcp any any eq www
WAE(config-ext-nacl)# permit tcp host 10.1.1.5 any eq ssh
WAE(config-ext-nacl)# exit
The following commands activate the access list for an interface:
WAE(config)# interface gigabitethernet 1/0
WAE(config-if)# ip access-group example in
WAE(config-if)# exit
The following example shows how this configuration appears when you enter the show
running-configuration command:
...
!
interface GigabitEthernet 1/0
ip address 10.1.1.50 255.255.0.0
ip access-group testextacl in
exit
. . .
ip access-list extended testextacl
permit tcp any any eq www
permit tcp host 10.1.1.5 any eq ssh
exit
. . .
administratively-prohibited alternate-address conversion-error
dod-host-prohibited dod-net-prohibited echo
echo-reply general-parameter-problem host-isolated
host-precedence-unreachable host-redirect host-tos-redirect
host-tos-unreachable host-unknown host-unreachable
information-reply information-request mask-reply
mask-request mobile-redirect net-redirect
net-tos-redirect net-tos-unreachable net-unreachable
network-unknown no-room-for-option option-missing
packet-too-big parameter-problem port-unreachable
precedence-unreachable protocol-unreachable reassembly-timeout
redirect router-advertisement router-solicitation
source-quench source-route-failed time-exceeded
timestamp-reply timestamp-request traceroute
ttl-exceeded unreachable
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