Category Archives: ASA

ASA, Cisco, Computer, VPN

Cisco IPSec VPN and WWAN Cards are not working so we move to Cisco AnyConnect

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Lately we discovered that Windows 7, Cisco IPsec VPNs and buildin UMTS Cards, also called WWAN Cards, do not work togehter. So we are now going the next step to the Cisco AnyConnect on the ASA Platform.

Here the snipplet from the release notes:

Support for Windows 7 on x64 (64-bit). This release, however, does not support WWAN devices (also called wireless data cards) on Windows 7 x86 (32-bit) and x64.

Reference : Release Notes for Cisco VPN Client, Release 5.0.0

For the ASA based AnyConnect you will find the nessesay Tools and Software here:

Cisco ASA Series Firewalls and VPN Gateways
Cisco AnyConnect Client
Cisco AnyConnect Client Profile Editor

A Basic Installation will follow.

If you feel this helps a bit or may be not ? Please leave a comment.

Flickr : , , , ,

ASA, Cisco, Computer, E-Mail, SMTP

Cisco ASA and lot of email recipients

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Those days we faced the problem that we recived a mail with approx 150 recipients.
Somewhere in the communication it seams that a mail address is broken by the asa.

On the Outside of the ASA you see following in the trace:

        Inside E-Mail Server (Blue) mail.example.com
        Outside E-Mail Server (Red) mail.asdf.com
        220-mail.example.com ESMTP Server [Wed, 18 Aug 2010 10:30:58 +0200]
        220-Ready to recycle your bits, but we don't want 
        220 your unsolicited or bulk e-mail (ie: spam) 
        EHLO mail.asdf.com 
        250-mail.example.com Hello mail.asdf.com [192.168.0.1] 
        250-SIZE 4194304
        250-PIPELINING 
        250-AUTH PLAIN LOGIN CRAM-MD5 NTLM 
        250-STARTTLS 
        250 HELP 
        MAIL FROM:<asdf@asdf.com> SIZE=42157 
        RCPT TO:<user1@example.com> 
        <output omited> 
        RCPT TO:<user20@example.com> 
        RCPT TO:<user21@ 
        250 OK 
        example.com> 
        RCPT TO:<user22@example.com> 
        RCPT TO:<user23@example.com> 
        RCPT TO:<user24@example.com>
        <output omited> 
        250 Accepted 
        <output omited> 
        250 Accepted 
        
            501 <user21@XXXXXXXXXXXXXX: '>' missing at end of address
          
        250 Accepted 
        250 Accepted
        250 Accepted

On the Inside of the ASA you see following in the trace:

        Inside E-Mail Server (Blue) mail.example.com
        Outside E-Mail Server (Red) mail.asdf.com
        220-mail.example.com ESMTP Server [Wed, 18 Aug 2010 10:30:58 +0200]
        220-Ready to recycle your bits, but we don't want
        220 your unsolicited or bulk e-mail (ie: spam)
        EHLO mail.asdf.com
        250-mail.example.com Hello mail.asdf.com [192.168.0.1]
        250-SIZE 4194304
        250-PIPELINING
        250-AUTH PLAIN LOGIN CRAM-MD5 NTLM
        250-STARTTLS
        250 HELP
        MAIL FROM:<asdf@asdf.com> SIZE=42157
        RCPT TO:<user1@example.com>
        <output omited> 
        RCPT TO:<user20@example.com>
        RCPT TO:<user21@ 250 OK
        XXXXXXXXXXXXXX
        RCPT TO:<user22@example.com>
        RCPT TO:<user23@example.com>
        RCPT TO:<user24@example.com>
        <output omited> 
        250 Accepted
        <output omited> 
        250 Accepted
        
            501 <user21@XXXXXXXXXXXXXX: '>' missing at end of address
          
        250 Accepted
        250 Accepted
        250 Accepted

This is a little bit strange so i will ask the Guys from Cisco if this is a known feature or a bug.

For the Momemt we have disabled the esmtp fixup, on monday we will do future analysis.

If you feel this helps a bit or may be not ? Please leave a comment.

ASA, Cisco, Computer, Tacacs+

Cisco ASA and Tacacs+

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How to use Tacacs+ on Cisco ASA for Shell and Web Authentication

Assume the Tacacs+ Servers are:

Cisco ACS Server 1 10.120.10.11
Cisco ACS Server 2 10.120.10.12

[sourcecode gutter=”false” autolinks=”false”]
aaa-server AAA-TACACS+ protocol tacacs+
!
aaa-server AAA-TACACS+ (Management) host 10.120.10.11
key YYYYXXXYYY
!
aaa-server AAA-TACACS+ (Management) host 10.120.10.12
key YYYYXXXYYY
!
! Delete the old local only configuration
no aaa authentication http console LOCAL
no aaa authentication ssh console LOCAL
!
aaa authentication http console AAA-TACACS+ LOCAL
aaa authentication ssh console AAA-TACACS+ LOCAL
aaa authentication enable console AAA-TACACS+ LOCAL
aaa authorization command AAA-TACACS+ LOCAL
!
[/sourcecode]
If you have allready configured aaa for the ssh you might see something like

[sourcecode autolinks=”false” gutter=”false” highlight=”2″]
asa1(config)# aaa authentication ssh console AAA-TACACS+ LOCAL
Range already exists.
[/sourcecode]
Then you must first disable the aaa authentication and than add the new settings.
[sourcecode autolinks=”false” gutter=”false”]
no aaa authentication ssh console LOCAL
aaa authentication ssh console AAA-TACACS+ LOCAL
[/sourcecode]

If you feel this helps a bit or may be not ? Please leave a comment.

ASA, Cisco, Computer, E-Mail, PIX, Security, SMTP

Cisco ASA and SMTP

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We recently bought so new Firewalls to replace to aged Cisco PIX515e with some new Gear. We decided to use Ciscos new Firewall flagship the Cisco ASA Devices. Everything was fine after the replacement, we transfered the configuration from the old boxes to the new with the help of the Cisco Security Manager.

Later that day there was complains about e-mails are not delivered properly.

On the Cisco PIX with Software 6.2 we had implemented following:

   
        no fixup smtp

For the ASA5510 we had to implement following

        policy-map type inspect esmtp esmtp_pmap
            parameters
              allow-tls action log
        policy-map global_policy
            class inspection_default
                no inspect esmtp
                inspect esmtp esmtp_pmap
            exit
        exit

If you feel this helps a bit or may be not ? Please leave a comment.