RE: Can anyone clarify the difference of these two?
Summary 7[192.168.1.1] [192.168.1.22] 75 0:00:00.028 0.000.765 03/02/2001 08:48:19 AM Telnet: C PORT=2909 IAC Do Echo DLC: - DLC Header - DLC: DLC: Frame 7 arrived at 08:48:19.6589; frame size is 75 (004B hex) bytes. DLC: Destination = Station Cisco14A4BFA DLC: Source = Station NGC 0DD6BC DLC: Ethertype = 0800 (IP) DLC: IP: - IP Header - IP: IP: Version = 4, header length = 20 bytes IP: Type of service = 00 IP: 000. = routine IP: ...0 = normal delay IP: 0... = normal throughput IP: .0.. = normal reliability IP: ..0. = ECT bit - transport protocol will ignore the CE bit IP: ...0 = CE bit - no congestion IP: Total length= 61 bytes IP: Identification = 340 IP: Flags = 4X IP: .1.. = don't fragment IP: ..0. = last fragment IP: Fragment offset = 0 bytes IP: Time to live= 128 seconds/hops IP: Protocol= 6 (TCP) IP: Header checksum = 75FF (correct) IP: Source address = [192.168.1.1] IP: Destination address = [192.168.1.22] IP: No options IP: TCP: - TCP header - TCP: TCP: Source port = 2909 TCP: Destination port= 23 (Telnet) TCP: Sequence number = 11781200 TCP: Next expected Seq number= 11781221 TCP: Acknowledgment number = 1056999721 TCP: Data offset = 20 bytes TCP: Flags = 18 TCP: ..0. = (No urgent pointer) TCP: ...1 = Acknowledgment TCP: 1... = Push TCP: .0.. = (No reset) TCP: ..0. = (No SYN) TCP: ...0 = (No FIN) TCP: Window = 8706 TCP: Checksum= 9A94 (correct) TCP: No TCP options TCP: [21 Bytes of data] TCP: Telnet: - Telnet - Telnet: Telnet: IAC Do Echo Telnet: IAC Do Suppress go-ahead Telnet: IAC Will Terminal-type Telnet: IAC Will Negotiate about window size Telnet: IAC SB ... Telnet: Telnet: -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of jeongwoo park Sent: Friday, March 02, 2001 3:09 AM To: [EMAIL PROTECTED] Subject: Can anyone clarify the difference of these two? hi all Can anyone clarify the difference of these two? access-list 101 permit tcp host 192.168.1.52 eq telnet any access-list 101 permit tcp host 192.168.1.52 any eq telnet -- jeongwoo _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Can anyone clarify the difference of these two?
hi all Can anyone clarify the difference of these two? access-list 101 permit tcp host 192.168.1.52 eq telnet any access-list 101 permit tcp host 192.168.1.52 any eq telnet -- jeongwoo _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Can anyone clarify the difference of these two?
I think, though I am willing to be wrong on this, to match the first line the source port must equal telnet, while the destination port is not specified. To match the second line, the source and destination ports must equal telnet. Does that result in a functional difference? Not to my knowledge, at least not in the case of a vanilla telnet application, where the source and destination ports are likely to be the same number. Suppose instead of "telnet" the number "1099" were used (or any arbitraty port)... Would that make a difference between the two lines - yes, I think so... Z From: "jeongwoo park" [EMAIL PROTECTED] Reply-To: "jeongwoo park" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Can anyone clarify the difference of these two? Date: Thu, 1 Mar 2001 18:08:31 -0800 hi all Can anyone clarify the difference of these two? access-list 101 permit tcp host 192.168.1.52 eq telnet any access-list 101 permit tcp host 192.168.1.52 any eq telnet -- jeongwoo _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ Get your FREE download of MSN Explorer at http://explorer.msn.com _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
