08-29-2008 08:11 AM - edited 03-10-2019 04:16 AM
I am unable to configure the TCP Reset on my IPS 4255 in Promiscous mode.
I have declare one interface of 0/0 IPS as tcp reset, for interface gig 0/1.
but still not working. Please tell me how to configure and how to verify the configuration.
Solved! Go to Solution.
08-30-2008 10:16 AM
Make a custom STRING TCP signature direction 'to server' for Telnet (Port 23). Match on any string like 'abcd'. Now telnet on the SPANNED vlan, and then try to type abcd. as soon as you type 'd' (the last letter) your telnet connection will get stuck :)
Regards
Farrukh
08-29-2008 12:02 PM
Did you add the ingress keyword on the switch? Can you post your SPAN configs?
Regards
Farrukh
08-30-2008 06:24 AM
Please see the span configuraiton,
monitor session 1 source interface Gi1/0/1
monitor session 1 destination interface Gi1/0/5
now when i try to give the ingress keyword it gave me error of incomplete command error.
dot1q ingress forwarding using dot1q encapsulation
isl ingress forwarding using isl encapsulation
untagged ingress forwarding using untagged encapsulation
vlan Set default VLAN for untagged ingress traffic
I have only one VLN 1 and 13 as native VLAN on my switch.
All switch ports are member of VLAN 1.
Switch is trunk with other switch
PDC-OUT-3750-1#sh interfaces trun
PDC-OUT-3750-1#sh interfaces trunk
Port Mode Encapsulation Status Native vlan
Po1 on 802.1q trunking 13
Port Vlans allowed on trunk
Po1 1-4094
Port Vlans allowed and active in management domain
Po1 1,13
Port Vlans in spanning tree forwarding state and not pruned
Please let me know which option to select after ingress.
I will be very greatful to you.
08-30-2008 08:03 AM
ingress vlan 1
Regards
Farrukh
08-30-2008 10:02 AM
Thanks for the reply, but please let me know how the verify that the tcp reset is working. I have signature that has action configured to rest tcp connection.
but how can i verify that tcp rest is working.
08-30-2008 10:16 AM
Make a custom STRING TCP signature direction 'to server' for Telnet (Port 23). Match on any string like 'abcd'. Now telnet on the SPANNED vlan, and then try to type abcd. as soon as you type 'd' (the last letter) your telnet connection will get stuck :)
Regards
Farrukh
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