Re: Access List.

From: Walter Roberson (roberson_at_ibd.nrc-cnrc.gc.ca)
Date: 09/23/05


Date: Fri, 23 Sep 2005 04:45:45 +0000 (UTC)

In article <1127441738.956071.3210@g44g2000cwa.googlegroups.com>,
 <kennylee88@gmail.com> wrote:
: Are the Access List on my 2701 router its same as PIX 501(6.3 ver)??

Cisco doesn't have a 27xx model line. If you are referring to a 2701
model from a different manufacturer, we need to know which
manufacturer.

Cisco used to offer 1601 and 2501 routers (but not 2601 or 3601.) Cisco still
offers a 1701 ADSL router; those aren't all that common. There is also
the relatively new Cisco 2801 router.

Access lists on the Cisco 1601, 2501, and 2801 router are NOT the
same as access lists on the PIX 501 -- but they are fairly
similar.

Access lists on the PIX use netmask style masks. Access lists
on Cisco's routers use "wildcard masks", which are 2's complement
of the netmask style.

access-list 110 permit ip 10.20.30.0 255.255.255.0 any
access-list 120 permit ip 10.20.30.0 0.0.0.255 any

110 is PIX style, 120 is IOS style.

Access lists on the PIX can be named or numbered, and there is
no special significance to the name or number (a number is just
an unusual name.)

Standard and extended ccess lists on Cisco's IOS are numbered,
and the number has significance. Standard access lists under IOS
do not look similar to PIX's access-lists. Extended access lists
under IOS have a fair bit in common with PIX access lists.
Cisco also offers named access lists that use a different syntax.

access-lists on PIX can use object-groups. I don't know if
object-groups have made it into any IOS version yet.

access-lists on IOS can reference various TCP flags.
access-lists on PIX through 6.x cannot reference any TCP flags.

Logging options are different between the two.

There are probably other differences as well.

-- 
   "No one has the right to destroy another person's belief by
   demanding empirical evidence."              -- Ann Landers


Relevant Pages

  • RE: [fw-wiz] Odd PIX / router behavior
    ... 10.0.0.1 is the inside interface of the PIX. ... I suspect it is within your ISPs ... As you suggested you could add access lists on the 1605 ...
    (Firewall-Wizards)
  • PIX - Confused on how to create Crypto Access Lists - help
    ... I am configuring a PIX 515E for VPN ... isakmp policy 10 authentication pre-share ... crypto access lists seem the same as configuring regular access lists ...
    (comp.security.firewalls)
  • Re: Deny access from inside interface
    ... The random client port will be blocked by the access list. ... The Cisco PIX is a stateful firewall, ... exists and the access lists permit the accesses, ... you could have a host that was open from the ...
    (comp.dcom.sys.cisco)
  • Re: cisco PIX 501 Problem
    ... the PIX is self-generating it. ... Downloadable access lists come into play as Easy VPN client - the ... downloaded (there's nothing downloading to you at that point). ...
    (comp.security.firewalls)
  • Re: Hardware firewalls
    ... A router with access lists is not a firewall. ... Devices like Checkpoint FW-1, Pix, Netscreen are firewalls. ... It's better to use a real firewall, than a router with FW/IDS feature. ...
    (comp.security.firewalls)

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