01-23-2005 04:42 AM - edited 03-05-2019 11:25 AM
Hi, I'm rather new to working with a Cisco equipment. Just switched to it from a Netgear a month ago. Got a weird problem with my Cisco 831 Router at the moment.
To send e-mail I need to log into my outgoing SMTP server. But since I install the 831 it just refuses to work. When you hit send it is immediately bounced back from "System Administrator" saying "Authentication Required". If I use a SMTP server that doesn't require authentication it works fine.
Before with the netgear it worked and I've tried putting it back in since the 831 was installed. And it still works placing the blame on the 831.
Anyone came across anything like this?
Any ideas?
Thanks,
Peter
Solved! Go to Solution.
01-25-2005 01:33 PM
IMO mentioned CBAC problem can be solved in several ways:
1. remoove line
ip inspect name myfw smtp timeout 3600
2. add permit to apropriate ACL
access-list 111 remark Permit SMTP authentica
access-list 111 permit tcp any any eq ident
or ... access-list 111 permit tcp
3. line repleacement in CBAC inspection rules
remoove line
ip inspect name myfw smtp timeout 3600
add line
ip inspect name myfw Esmtp timeout 3600
details in 'ESMTP Support for Cisco IOS Firewall'
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123newft/123t/123t_7/gt_esmtp.htm link
I recomend more advances - the latest solution.
BTW for Cisco devices cfg can be used
Telconi Terminal http://www.telconi.com/mdown.html
(No installation required)
01-23-2005 08:38 AM
Hello Peter,
can you post the configuration of your 831 ?
Regards,
GP
01-23-2005 11:26 AM
Hi,
Thanks for your reply.
Hopefully this is what your after.
Building configuration...
Current configuration : 4650 bytes
!
version 12.3
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname admin
!
no logging buffered
enable secret xxxx.
!
username xxx password xxx
username xxx password xxx
username xxx password xxxx
no aaa new-model
ip subnet-zero
ip name-server 62.31.64.39
ip name-server 62.31.112.39
ip dhcp excluded-address 192.168.168.1
ip dhcp excluded-address 192.168.168.168
ip dhcp excluded-address 192.168.168.101
!
ip dhcp pool CLIENT
import all
network 192.168.168.0 255.255.255.0
default-router 192.168.168.1
lease 0 2
!
!
ip inspect name myfw cuseeme timeout 3600
ip inspect name myfw ftp timeout 3600
ip inspect name myfw rcmd timeout 3600
ip inspect name myfw realaudio timeout 3600
ip inspect name myfw smtp timeout 3600
ip inspect name myfw tftp timeout 30
ip inspect name myfw udp timeout 15
ip inspect name myfw tcp timeout 3600
ip inspect name myfw h323 timeout 3600
ip audit notify log
ip audit po max-events 100
no ftp-server write-enable
!
!
!
!
!
!
!
interface Ethernet0
description CRWS Generated text. Please do not delete this:192.168.168.1-255.255.255.0
ip address 192.168.168.1 255.255.255.0 secondary
ip address 10.10.10.1 255.255.255.0
ip nat inside
no cdp enable
hold-queue 32 in
!
interface Ethernet1
ip address dhcp client-id Ethernet1
ip access-group 111 in
ip nat outside
ip inspect myfw out
duplex auto
no cdp enable
!
interface FastEthernet1
no ip address
duplex auto
speed auto
!
interface FastEthernet2
no ip address
duplex auto
speed auto
!
interface FastEthernet3
no ip address
duplex auto
speed auto
!
interface FastEthernet4
no ip address
duplex auto
speed auto
!
ip nat inside source list 102 interface Ethernet1 overload
ip nat inside source static tcp 192.168.168.168 5900 interface Ethernet1 5900
ip nat inside source static tcp 192.168.168.168 80 interface Ethernet1 80
ip nat inside source static tcp 192.168.168.168 21 interface Ethernet1 21
ip classless
ip http server
no ip http secure-server
!
access-list 23 permit 192.168.168.0 0.0.0.255
access-list 23 permit 10.10.10.0 0.0.0.255
access-list 102 permit ip 192.168.168.0 0.0.0.255 any
access-list 111 permit tcp any any eq ftp
access-list 111 permit tcp any any eq www
access-list 111 permit tcp any any eq 5900
access-list 111 permit icmp any any administratively-prohibited
access-list 111 permit icmp any any echo
access-list 111 permit icmp any any echo-reply
access-list 111 permit icmp any any packet-too-big
access-list 111 permit icmp any any time-exceeded
access-list 111 permit icmp any any traceroute
access-list 111 permit icmp any any unreachable
access-list 111 permit udp any eq bootps any eq bootpc
access-list 111 permit udp any eq bootps any eq bootps
access-list 111 permit udp any eq domain any
access-list 111 permit esp any any
access-list 111 permit udp any any eq isakmp
access-list 111 permit udp any any eq 10000
access-list 111 permit tcp any any eq 1723
access-list 111 permit tcp any any eq 139
access-list 111 permit udp any any eq netbios-ns
access-list 111 permit udp any any eq netbios-dgm
access-list 111 permit gre any any
access-list 111 deny ip any any
no cdp run
!
line con 0
exec-timeout 120 0
no modem enable
stopbits 1
line aux 0
line vty 0 4
access-class 23 in
exec-timeout 120 0
login local
length 0
!
scheduler max-task-time 5000
!
end
01-23-2005 11:30 AM
01-23-2005 12:50 PM
Hello,
can you add the keyword ´log´ to the ´access-list 111 deny ip any any´ statement ? With the ´term mon´ exec command, you can then see if your access list is blocking any traffic, and if so, which.
Regards,
GP
01-25-2005 01:33 PM
IMO mentioned CBAC problem can be solved in several ways:
1. remoove line
ip inspect name myfw smtp timeout 3600
2. add permit to apropriate ACL
access-list 111 remark Permit SMTP authentica
access-list 111 permit tcp any any eq ident
or ... access-list 111 permit tcp
3. line repleacement in CBAC inspection rules
remoove line
ip inspect name myfw smtp timeout 3600
add line
ip inspect name myfw Esmtp timeout 3600
details in 'ESMTP Support for Cisco IOS Firewall'
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123newft/123t/123t_7/gt_esmtp.htm link
I recomend more advances - the latest solution.
BTW for Cisco devices cfg can be used
Telconi Terminal http://www.telconi.com/mdown.html
(No installation required)
01-25-2005 11:28 PM
Thanks.
This solved the problem. I can now send e-mails again.
And thats a really nice program as well. Thanks for that too.
Peter
01-26-2005 09:56 AM
Nice to see
Thank you for feedback
tx for rating
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