Cisco PIX 501 Firewall Config

Hi,
I know this is an old firewall but its just a simple firewall I need, my question is this.
I am not getting any internet with my current config, see below:
show conf
: Saved
: Written by enable_15 at 00:52:17.182 UTC Fri Jul 20 2012
PIX Version 6.3(5)
interface ethernet0 auto shutdown
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
enable password PVSASRJovmamnVkD encrypted
passwd 2KFQnbNIdI.2KYOU encrypted
hostname bmi-501-fw-1
domain-name buildmeit.internal
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names
access-list allow_ping permit icmp any any echo-reply
access-list allow_ping permit icmp any any source-quench
access-list allow_ping permit icmp any any unreachable
access-list allow_ping permit icmp any any time-exceeded
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside 78.XX.XXX.XXX 255.255.240.0
ip address inside 10.52.100.123 255.255.255.0
ip audit info action alarm
ip audit attack action alarm
pdm history enable
arp timeout 14400
nat (inside) 101 0.0.0.0 0.0.0.0 0 0
access-group allow_ping in interface outside
access-group allow_ping in interface inside
route inside 10.52.0.0 255.255.0.0 10.52.100.123 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
timeout sip-disconnect 0:02:00 sip-invite 0:03:00
timeout uauth 0:05:00 absolute
aaa-server TACACS+ protocol tacacs+
aaa-server TACACS+ max-failed-attempts 3
aaa-server TACACS+ deadtime 10
aaa-server RADIUS protocol radius
aaa-server RADIUS max-failed-attempts 3
aaa-server RADIUS deadtime 10
aaa-server LOCAL protocol local
http server enable
http 10.52.10.0 255.255.255.0 inside
http 10.52.66.0 255.255.255.0 inside
no snmp-server location
no snmp-server contact
snmp-server community public
no snmp-server enable traps
floodguard enable
telnet timeout 5
ssh timeout 5
management-access inside
console timeout 0
terminal width 80
Cryptochecksum:f8f18bf2b944dddfaf3d83e6c1e1c57c
bmi-501-fw-1#
What am I missing, if I try and ping 8.8.8.8 it times out, any suggestions?

Hi, Thanks for the reply, I've managed to sort it now with the following config below:
interface ethernet0 auto
interface ethernet1 100full
nameif ethernet0 outside security0
nameif ethernet1 inside security100
hostname bmi-501-fw-1
domain-name buildmeit.internal
fixup protocol dns maximum-length 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol skinny 2000
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
access-list PERMIT_IN deny tcp any any
access-list PERMIT_IN deny ip any any
access-list PERMIT_IN deny udp any any
access-list PERMIT_OUT permit tcp any any
access-list PERMIT_OUT permit ip any any
access-list PERMIT_OUT permit udp any any
access-list PERMIT_OUT permit icmp any any
pager lines 24
mtu outside 1500
mtu inside 1500
ip address outside XXX.XX.XXX.XXX 255.255.240.0
ip address inside 10.52.100.123 255.255.255.0
global (outside) 1 interface
outside interface address added to PAT pool
nat (inside) 1 0.0.0.0 0.0.0.0 0 0
access-group PERMIT_IN in interface outside
access-group PERMIT_OUT in interface inside
route outside 0.0.0.0 0.0.0.0 XX.XX.XXX.1 1
route inside 10.52.0.0 255.255.0.0 10.52.100.123 1
wr mem
Regards to point 5 where you say devices like this shouldnt be used, I know its an unsupported device but what other reasons should I not be using it, its a good\simple firewall - i'd rather use this than say...........a horrible netgear!

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    : end

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    : Saved
    : Written by enable_15 at 08:55:56.390 UTC Fri Mar 15 2013
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    nameif ethernet0 outside security0
    nameif ethernet1 inside security100
    enable password YYYYYY encrypted
    passwd YYYYYY encrypted
    hostname sunny
    domain-name ciscopix.com
    fixup protocol dns maximum-length 512
    fixup protocol ftp 21
    fixup protocol h323 h225 1720
    fixup protocol h323 ras 1718-1719
    fixup protocol http 80
    fixup protocol ils 389
    fixup protocol pptp 1723
    fixup protocol rsh 514
    fixup protocol rtsp 554
    fixup protocol sip 5060
    fixup protocol sip udp 5060
    fixup protocol skinny 2000
    no fixup protocol smtp 25
    fixup protocol sqlnet 1521
    fixup protocol tftp 69
    names
    access-list outside-mail permit tcp any any eq 465
    access-list outside-mail permit tcp any any eq 993
    pager lines 24
    logging on
    logging monitor emergencies
    logging buffered informational
    mtu outside 1500
    mtu inside 1500
    ip address outside dhcp setroute
    ip address inside 192.168.10.254 255.255.255.0
    ip audit info action alarm
    ip audit attack action alarm
    pdm logging informational 100
    pdm history enable
    arp timeout 14400
    global (outside) 1 interface
    nat (inside) 1 192.168.10.0 255.255.255.0 0 0
    access-group outside-mail in interface outside
    timeout xlate 0:05:00
    timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
    timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
    timeout uauth 0:05:00 absolute
    aaa-server TACACS+ protocol tacacs+
    aaa-server RADIUS protocol radius
    aaa-server LOCAL protocol local
    no snmp-server location
    no snmp-server contact
    snmp-server community public
    no snmp-server enable traps
    floodguard enable
    telnet 192.168.10.0 255.255.255.0 inside
    telnet timeout 5
    ssh 192.168.10.0 255.255.255.0 inside
    ssh timeout 60
    console timeout 0
    dhcpd address 192.168.10.10-192.168.10.39 inside
    dhcpd lease 3600
    dhcpd ping_timeout 750
    dhcpd auto_config outside
    dhcpd enable inside
    username stefan password YYYYY encrypted privilege 2
    terminal width 80
    Cryptochecksum:
    : end
    [OK]
    What's the problem?
    Any recommondations for the config anyway?
    Thanks

    Thanks Gerhard for the answer, but i don't want to redirect the port to an inside mail server.
    I try to connect to an outside mail server with a mail client from an inside pc (who is in the dhcp ip pool, i.e. 192.168.10.22).
    to open the ports i added:
    access-list outside-mail permit tcp any any eq 465
    access-list outside-mail permit tcp any any eq 993
    access-group outside-mail in interface outside
    but why is there a deny because of the access-group in the log?
    106023: Deny tcp src outside:/993 dst inside:/1729 by access-group "outside-mail"
    Regards S.

  • Cisco ASA 5505 Firewall Not Allowing Incoming Traffic

    Hello,
    I am wondering if there is a very friendly cisco guru out there who can help me out.  I am trying to switch out a cisco pix 501 firewall with a cisco ASA 5505 firewall.  I am not very familiar with all of the commands for the firewalls and have always relied on a standard command line script that I use when building a new one.  Unfortunately, my script is not working with the 5505.  Can someone please let me know what I am doing wrong with the following script?  I've masked public IP info with xxx.xxx.xxx and I run it right after restoring the firewall to the factory defaults.  I am able to get out to the internet if I browse directly from one of the servers, but cannot access a web page when trying to browse to it from an outside network.
    access-list 100 permit icmp any any echo-reply
    access-list 100 permit icmp any any time-exceeded 
    access-list 100 permit icmp any any unreachable
    ip address outside xxx.xxx.xxx.94 255.255.255.224
    ip address inside 192.168.1.1 255.255.255.0
    global (outside) 1 xxx.xxx.xxx.106-xxx.xxx.xxx.116
    global (outside) 1 xxx.xxx.xxx.95
    nat (inside) 1 0.0.0.0 0.0.0.0 0 0
    route outside 0 0 xxx.xxx.xxx.93
    access-group 100 in interface outside
    nat (inside) 1 192.168.1.0 255.255.255.0
    nat (inside) 1 192.168.1.0 255.255.255.0 0 0
    outside 0.0.0.0 0.0.0.0 xxx.xxx.xxx.93 1 DHCP static
    static (inside,outside) xxx.xxx.xxx.95 192.168.1.95 netmask 255.255.255.255 0 0
    access-list 100 permit tcp any host xxx.xxx.xxx.95 eq www
    static (inside,outside) xxx.xxx.xxx.96 192.168.1.96 netmask 255.255.255.255 0 0
    access-list 100 permit tcp any host xxx.xxx.xxx.96 eq www

    Hey Craig,
    Based on your commands I think you were using 6.3 version on PIX and now you must be  moving to ASA ver 8.2.x.
    On 8.4 for interface defining use below mentioned example :
    int eth0/0
    ip add x.x.x.x y.y.y.y
    nameif outside
    no shut
    int eth0/1
    ip add x.x.x.x y.y.y.y
    nameif inside
    no shut
    nat (inside) 1 192.168.1.0 255.255.255.0
    global (outside) 1 xxx.xxx.xxx.106-xxx.xxx.xxx.116
    global (outside) 1 xxx.xxx.xxx.95
    access-list 100 permit icmp any any echo-reply
    access-list 100 permit icmp any any time-exceeded 
    access-list 100 permit icmp any any unreachable
    static (inside,outside) xxx.xxx.xxx.95 192.168.1.95 netmask 255.255.255.255 0 0
    access-list 100 permit tcp any host xxx.xxx.xxx.95 eq www
    static (inside,outside) xxx.xxx.xxx.96 192.168.1.96 netmask 255.255.255.255 0 0
    access-list 100 permit tcp any host xxx.xxx.xxx.96 eq www
    route outside 0 0 xxx.xxx.xxx.93
    access-group 100 in interface outside
    You can use two global statements as first statement would be used a dynamic NAT and second as PAT.
    If you're still not able to reach.Paste your entire config and version that you are using on ASA.

  • PIX 501 and Linksys VPN Router (WRV200)

    I have inherited a job where we have a Cisco PIX 501 firewall at one site, and Linksys WRV200 VPN Router on two other
    sites. I have been asked to connect these Linksys routers to the PIX firewall via VPN.
    I believe the Linksys vpn routers can only connect via IPSec VPN, so i am looking for help on configuring the PIX 501 to allow the linksys to connect with the following parameters, if possible.
    Key Exchange Method: Auto (IKE)
    Encryption: Auto, 3DES, AES128, AES192, AES256
    Authentication: MD5
    Pre-Shared Key: xxx
    PFS: Enabled/Disabled
    ISAKMP Key Lifetime: 28800
    IPSec Key Lifetime: 3600
    On the PIX i have the PDM installed and i have tried using the VPN Wizard to no avail.
    I chose the following settings when doing the VPN Wizard:
    Type of VPN: Remote Access VPN
    Interface: Outside
    Type of VPN Client Device used: Cisco VPN Client
    (can choose Cisco VPN 3000 Client, MS Windows Client using PPTP, MS Windows client using L2TP)
    VPN Client Group
    Group Name: RabyEstates
    Pre Shared Key: rabytest
    Extended Client Authentication: Disabled
    Address Pool
    Pool Name: VPN-LAN
    Range Start: 192.168.2.200
    Range End: 192.168.2.250
    DNS/WINS/Default Domain: None
    IKE Policy
    Encryption: 3DES
    Authentication: MD5
    DH Group: Group 2 (1024-bit)
    Transform Set
    Encryption: 3DES
    Authentication: MD5
    I have attached the VPN log from the Linksys VPN Router.
    This is the first time i've ever worked with PIX so i'm still trying to figure the thing out, but i'm confident with CCNA level networking.
    Thanks for your help!

    Hi again,
    I believe the pix has a 3des license because of the following parts of the "show version"
    Licensed Features:
    Failover: Disabled
    VPN-DES: Enabled
    VPN-3DES-AES: Enabled
    This PIX has a Restricted (R) license.
    I've tried reconnecting the VPN tunnel with debugging on the PIX and get the output as shown in the attached file "vpndebug.txt"
    As for the other show commands they give:
    pixfirewall# show crypto isakmp sa
    Total : 0
    Embryonic : 0
    dst src state pending created
    pixfirewall# show crypto ipsec sa
    interface: outside
    Crypto map tag: transam, local addr. 10.0.0.1
    local ident (addr/mask/prot/port): (192.168.1.0/255.255.255.0/0/0)
    remote ident (addr/mask/prot/port): (192.168.101.0/255.255.255.0/0/0)
    current_peer: 10.0.0.2:0
    PERMIT, flags={origin_is_acl,}
    #pkts encaps: 0, #pkts encrypt: 0, #pkts digest 0
    #pkts decaps: 0, #pkts decrypt: 0, #pkts verify 0
    #pkts compressed: 0, #pkts decompressed: 0
    #pkts not compressed: 0, #pkts compr. failed: 0, #pkts decompress failed: 0
    #send errors 0, #recv errors 0
    local crypto endpt.: 10.0.0.1, remote crypto endpt.: 10.0.0.2
    path mtu 1500, ipsec overhead 0, media mtu 1500
    current outbound spi: 0
    inbound esp sas:
    inbound ah sas:
    inbound pcp sas:
    outbound esp sas:
    outbound ah sas:
    outbound pcp sas:
    pixfirewall#
    Thanks again Daniel, i really appreciate your help on this matter.

  • PIX 501 Not working, why??

    Hi,
        I have just purchased a nex Cisco pix 501 firewall and i have installed these  certificates it asks for. Now the situation is that the certificates have been installed but this stupid thing won't even goto the PDM window.it just tell me that a new window will open but nothing happens and i am just tired of this thing. I have even installed java latest version but same issue then i read on the forums to use java 1.5x version, tried that too and it won't go to the. Now can anyone tell me how can i make this thing to work and move on to the PDM window. i also used tried it on mozilla, IE, chrome but same issue.
    Please help me out here ppl. Its getting really annoying
    Regards,
    Ali

    Hi Julio,
    Thank you so much for taking the time to assist me with this issue.  I'm not sure it's an ISP issue though (at least I hope not!)  Please consider:
    - When I first attempted to implement this change, I didn't even think to install a router between the cable modem, and switch.  I figured I would simply install a switch (or hub) between the cable modem and firewall, and that I would be able to plug my IDS into that switch (or hub),  But it wouldn't work.  The PIX couldn't pull an IP.  I found out the problem was that the ISP was seeing the switch as the primary device, and grabbing it's MAC address.  The PIX was ignored, and therefore never able to connect.  I called the ISP and they confirmed this is how they control how many devices are connected,  And since I only want to pay for 1 IP address from them, that's how it is.
    - Then I decided to try the router approach.  And it seems to work.  The 1st router interface is getting the IP address from the ISP.  I have communications between the pix and router, and also between the router and internal hosts.  I don't think the ISP cares what's on the other side of the router (do they?)
    - Each time I go home to try your recommendations I unplug the PIX from the cable modem, and connect the router inline.  That's when I lose internet connectivity.  But once I revert back to that configuration, it works again.  So the internet connection works fine.  It's only when I add the router to the mix that I lose it.
    Please let me know if you think there's anything else I can try here.  I can't help thinking it is my configuration and not an ISP issue - hoping you are able to find something else I may have done incorrectly.
    Thank you!
    -Bk

  • Simple PIX 501 Question

    I have a quick and easy question.
    Have been using a Cisco PIX 501 Firewall via a DSL connection to my hospital.
    Would now like to use it on my connection to Comcast cable connection.
    Does the PIX need to be re configured in any way, or can I just plug it in and use.

    Hi,
    Ofcourse you can plug it in to see if works without any configuration changes.
    In what type of use was the PIX previously? You say it was for a connection to a hospital? But from where?
    Are you going to use it just for home use now or will the PIX still server a connection to the hospital?
    Who handled the configurations of the PIX originally? I imagine if you can't configure the device yourself you might need some outside help.
    I suspect if you need to make configuration changes to it, then the minimum you need is to know the possible username/password to log into the device (unless its on default settings regards to those settings). Also following a certain Cisco guide would also make it possible to erase the passwords from the PIX if you have forgotten them.
    It might even be worth looking into a totally new firewall device instead of using money to get the old PIX501 working. You could for example get an ASA5505 which to my understanding should be lowest costing Cisco firewall model.
    If you have found the information helpfull you can rate the answer. Thats the best thanks you can give on these forums

  • PIX 501 config review

    I'm about to use a new PIX 501 firewall.
    I've attached the configuration I intend to use.
    I simply need to allow all outbound traffic, and allow inbound traffic only on specific IPs/ports to specific IPs/ports as in the "static" commands
    Do you think this config will work?
    Any recommendations?
    Thanks in advance
    interface ethernet0 10baset
    interface ethernet1 10full
    nameif ethernet0 outside security0
    nameif ethernet1 inside security100
    enable password bla1 encrypted
    passwd bla2 encrypted
    hostname F-PHL-01
    domain-name abc.com
    fixup protocol ftp 21
    fixup protocol h323 h225 1720
    fixup protocol h323 ras 1718-1719
    fixup protocol http 80
    fixup protocol ils 389
    fixup protocol rsh 514
    fixup protocol rtsp 554
    fixup protocol sip 5060
    fixup protocol sip udp 5060
    fixup protocol skinny 2000
    fixup protocol smtp 25
    fixup protocol sqlnet 1521
    names
    pager lines 100
    mtu outside 1500
    mtu inside 1500
    ip address outside xx.xx.51.34 255.255.255.224
    ip address inside 192.168.21.1 255.255.255.0
    ip audit info action alarm
    ip audit attack action alarm
    pdm logging informational 100
    pdm history enable
    arp timeout 14400
    global (outside) 1 xx.xx.51.35-xx.xx.51.62 netmask 255.255.255.224
    nat (inside) 1 0.0.0.0 0.0.0.0 0 0
    static (inside,outside) tcp xx.xx.51.39 80 192.168.21.39 80 netmask 255.255.255.255
    static (inside,outside) tcp xx.xx.51.40 80 192.168.21.40 80 netmask 255.255.255.255
    static (inside,outside) tcp xx.xx.51.41 80 192.168.21.41 80 netmask 255.255.255.255
    static (inside,outside) tcp xx.xx.51.42 80 192.168.21.42 80 netmask 255.255.255.255
    static (inside,outside) tcp xx.xx.51.43 80 192.168.21.43 80 netmask 255.255.255.255
    static (inside,outside) tcp xx.xx.51.47 80 192.168.21.47 80 netmask 255.255.255.255
    static (inside,outside) tcp xx.xx.51.48 80 192.168.21.48 80 netmask 255.255.255.255
    static (inside,outside) tcp xx.xx.51.48 443 192.168.21.48 443 netmask 255.255.255.255
    static (inside,outside) tcp xx.xx.51.48 53 192.168.21.48 53 netmask 255.255.255.255
    static (inside,outside) udp xx.xx.51.48 53 192.168.21.48 53 netmask 255.255.255.255
    static (inside,outside) tcp xx.xx.51.49 80 192.168.21.49 80 netmask 255.255.255.255
    static (inside,outside) tcp xx.xx.51.50 80 192.168.21.50 80 netmask 255.255.255.255
    static (inside,outside) tcp xx.xx.51.53 80 192.168.21.53 80 netmask 255.255.255.255
    static (inside,outside) tcp xx.xx.51.54 80 192.168.21.54 80 netmask 255.255.255.255
    static (inside,outside) tcp xx.xx.51.61 80 192.168.21.61 80 netmask 255.255.255.255
    route outside 0.0.0.0 0.0.0.0 xx.xx.51.33 1
    timeout xlate 0:05:00
    timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00
    timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00
    timeout uauth 0:05:00 absolute
    aaa-server TACACS+ protocol tacacs+
    aaa-server RADIUS protocol radius
    aaa-server LOCAL protocol local
    http server enable
    http 192.168.21.0 255.255.255.0 inside
    no snmp-server location
    no snmp-server contact
    snmp-server community public
    snmp-server enable traps
    floodguard enable
    telnet 192.168.21.0 255.255.255.0 inside
    telnet timeout 5
    ssh timeout 5
    console timeout 0
    terminal width 80
    Cryptochecksum:bla3

    Hi,
    PIX501 is a very very old Cisco firewall that has not been sold for a long time to my understanding. It also doesnt support even close to new software levels.
    If you wanted to replace the PIX501 the corresponding model nowadays would be ASA5505 which is the smallest Cisco ASA firewall with 8 switch port module. There is already a new ASA5500-X Series (while ASA5505 is of the original ASA 5500 Series) but they have not yet introduced a replacing model for this model nor have they stopped selling this unit. I have a couple of them at home. Though naturally they are more expensive than your usual consumer firewalls.
    But if you wanted to replace your PIX firewall then I would probably suggest ASA5505. Naturally you could get some other models too but the cost naturally rises even more. I am not sure at what price these are sold as used.
    I used some PIX501 firewalls at the start of my career but have not used them in ages since ASA5505 is pretty much the firewall model we use when we need a firewall/vpn device for a smaller network/branch site.
    Here is a PDF of the original ASA5500 Series.
    http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps6120/prod_brochure0900aecd80285492.pdf
    Here is a PDF of the new ASA5500-X Series
    http://www.cisco.com/en/US/prod/collateral/vpndevc/ps6032/ps6094/ps6120/at_a_glance_c45-701635.pdf
    I am afraid that its very hard for me atleast to troubleshoot this especially since I have not seen any outputs yet. Also the very old CLI and lack of GUI (?) make it harder to see what the problem is.
    Could you provide the requested outputs?
    From the PIX after connection test
    show crypto ipsec sa
    Screen captures of the VPN Client routing and statistics sections.
    - Jouni

  • Linksys WRT600N vs CISCO PIX 506E.... Firewall / Routing Performance

    Hi:
    I am new to the forum and was hoping to tap into some of your expertise. I have a Linksys WRT600N version 1.1 and I recently acquired a CISCO PIX 506E firewall. My question is what should I use as a firewall? Both have SPI etc. Should I:
    a) Use the 506E as a firewall and use the 600 as a wireless access point, or
    b) Use the 600 as a firewall and wireless access point.
    Do both routers have the same firewall routing performance? I want to use the storage feautre on the 600N, but if I do that and use it as a wireless access point the 600 can't get the proper time from the Internet, so my time for newly created folders and files shows they are 10 years old.
    Anyway, just thought I would post and find out what some of the experts thought and maybe someone from Linksys or CISCO. I know the 506E is discontinued and was manufactured around 2001 and the 600N is a new model.
    (Edited subject to keep threads from stretching. Thanks!)
    Message Edited by JOHNDOE_06 on 05-06-2008 10:41 AM

    The PIX is a real firewall. The WRT has a firewall which mostly protects the router itself. People prefer to buy a "SPI firewall router" instead of a simple "router" even though the router firewall does nothing or little to protect the LAN. The only firewall configurations on the WRTs you can usually do is on the Access Restrictions tab. But that's usually all. The LAN itself is not protected by the firewall. You would notice this if you had a public IP subnet and ran it through the WRT: the LAN would be fully exposed to the internet. Some routers have a few functions like protection against denial of service attacks or similar. But even then this often filters only the traffic targeted at the router and not the LAN.
    The common protection of your LAN you have on the WRT is because you use private IP addresses inside your LAN and the router does NAT. However, NAT is not a security mechanism but a mechanism to solve the problem that you can only have a single public IP address but want to use multiple computers, which is why you have to use private IP addresses. Current NAT implementations usually drop unsolicited incoming traffic because they don't know to which IP address in the LAN to send it to. But the notion of NAT is to deliver and to allow connectivity. This has nothing to do with security or a firewall.
    Thus, if you want to use a real firewall use the PIX. On the PIX you can configure the traffic which is allowed to enter the LAN and which not. It is far superior in this respect to the WRT. However, as it is a older model, I cannot tell how fast the PIX is. You should be able to find the old data sheets of the PIX somewhere on the cisco website. They should mention the possible throughput. I guess it won't be an issue.
    To me another point for the PIX are the VPN capabilities which allow you to securely access your LAN while you are on the road.
    Of course, you must know how to configure the PIX correctly. It is a complex device and can be configured pretty much for anything you like. This means of course if you do it wrong you may end up with little or no security.
    BTW, there are no people from linksys in this forums except the moderators (which may be from lithium). To hear from Linksys you have to contact Linksys support.

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