| Vern Paxson, Mark Allman, Scott Dawson, William Fenner, Jim Griner, Ian Heavens, Kevin Lahey, Jeff Semke, and Bernie Volz. Known TCP Implementation Problems, March 1999. RFC 2525. |
....might be retransmitted and the receiver will see several versions of the data corresponding to a particular range of sequence numbers. If the sender s TCP stack is operating correctly, these copies should be identical. Unfortunately, there are buggy TCP stacks that will generate different versions[15][17] This problem can also occur if there is a malicious attacker that is using a modified TCP stack at the client to purposely trick the library into accepting incorrect data. This problem often comes up in Intrusion Detection Systems (IDS) 16] 17] which contain functionality similar to our ....
V. Paxson, et. al. Known TCP implementation problems, RFC2525. 1999
....at real risk of congestion collapse. Applications could implement their own congestion control mechanisms on a case by case basis on top of UDP, and some already do. Implementing congestion control is difficult and error prone, however, as the long history of buggy TCP implementations makes clear [16, 17], and new applications are unlikely to do it correctly on their own. We believe that a new transport protocol is needed, one that combines unreliable datagram delivery with built in congestion control. This protocol would act as an enabling technology: new and existing applications could use it to ....
V. Paxson, M. Allman, S. Dawson, W. Fenner, J. Griner, I. Heavens, K. Lahey, J. Semke, and B. Volz. Known TCP implementation problems. RFC 2525, Internet Engineering Task Force, Mar. 1999.
....control provided by a lower layer. If the application can rely on a lower layer that gives a choice between TCP like or TFRC like congestion control, and that offers ECN, then this might be highly satisfactory to many application designers. The long history of debugging TCP implementations [RFC 2525] TBIT] makes the difficulties in implementing end to end congestion control abundantly clear. It is clearly more robust for congestion control to be provided for the application by a lower layer. In rare cases there might be compelling reasons for the congestion control mechanism to be ....
V. Paxson et al., Known TCP Implementation Problems, RFC 2525, March 1999.
....allow immediate ACK on PSH to be turned on as an option. Other implementations (e.g. Windows) acknowledge every other segment regardless of their size. A well known bug found in some implementations ignores the presence of TCP options in TCP segments when checking for two MSS sized segments [152]. This means that received segments will be considered smaller than 1 MSS and therefore the receiver would send an acknowledgment for every three such segments. Note that the speci cation of delayed ACKs does not di erentiate between normal and duplicate ACKs [36] However, most implementations ....
....many implementors allow themselves the freedom to deviate from the standard behavior, in the bene t of simplicity or inter operability with other existing implementations. Therefore the information contained in this document may not apply to every single TCP implementation or version. See [152] for a list of common bugs. 67 ....
Paxson V., Known TCP Implementation Problems, RFC2525, March 1999.
....the results. I. INTRODUCTION It is well known that some protocol implementations and network applications are not fully conformant with the standards and might pollute a network with incorrectly formed packets. A number of common implementation problems were even documented, for example, in [17]. Intentional abuse of network resources can also become a threat to sound communication for the communicating hosts as well as other machines that rely on services provided by the global Internet. Since control information that is necessary for the correct performance of network protocols is ....
V. Paxson, M. Allman, S. Dawson, W. Fenner, J. Griner, J. Heavens, K. Lahey, J. Semke, and B. Volz. Known TCP implementation problems. RFC 2525, March 1999. http://www.ietf.org/rfc/rfc2525.txt.
....enhancements to TRIC in section 5 and finally conclude in section 6. 2. Motivation The popularity of the Internet has caused a proliferation in the number of TCP implementations. Some of these may fail to implement the TCP congestion avoidance mechanisms correctly because of poor implementation [8]. Others may deliberately have congestion avoidance algorithms that are more aggressive in their use of bandwidth than other TCP implementations; this would allow a vendor to claim to have a faster TCP . The logical consequence would be a spiral of increasingly aggressive TCP implementations, ....
Paxson, V., Allman, M., Dawson, S., Fenner, W., Griner, J., Heavens, I., Lahey, K., Semke, J. and B. Volz, "Known TCP Implementation Problems", RFC 2525, March 1999.
....the restriction described in Section 6. 5.3 TCP implementation faults Here we present a number of TCP features that were noticed while examining TCP traces during measurements in the live GPRS network and during tests with Seawind. Some of these implementation problems are already discussed in [23, 21]. A huge initial window. We were surprised to observe that FreeBSD used the initial window of 16 kilobytes instead of one or two segments currently allowed [2] Apparently, the initial window is set to this value when the sender and receiver are located in the same IP subnetwork. This is clearly ....
V. Paxson, M. Allman, S. Dawson, W. Fenner, J. Griner, I. Heavens, K. Lahey, J. Semke, and B. Volz. Known TCP implementation problems. IETF RFC 2988, Mar. 1999.
....control provided by a lower layer. If the application can rely on a lower layer that gives a choice between TCP like or TFRC like congestion control, and that offers ECN, then this might be highly satisfactory to many application designers. The long history of debugging TCP implementations [RFC 2525] TBIT] makes the difficulties in implementing end to end congestion control abundantly clear. It is clearly more robust for the congestion control to be provided for the application by a lower layer. In rare cases there might be compelling reasons for the congestion control mechanism to be ....
V. Paxson et at., Known TCP Implementation Problems, RFC 2525, March 1999.
....a number of user configurable parameters. These are set differently by different users, and data about these parameters cannot be obtained by merely identifying the OS or by analyzing the source code. Second, regardless of the claims made by the vendor, the TCP code might contain subtle bugs [26], and hence, the observed behavior can be significantly different from claims in vendor literature. Thus, direct experimentation is required, either in laboratory experiments or across the Internet with public web servers. While laboratory experiments are well suited for a thorough exploration of ....
V. Paxson, M. Allman, S. Dawson, W. Fenner, J. Griner, I. Heavens, K. Lahey, J. Semke, and B. Volz. Known TCP Implementation Problems, March 1999. RFC2525.
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Vern Paxson, Mark Allman, Scott Dawson, William Fenner, Jim Griner, Ian Heavens, Kevin Lahey, Jeff Semke, and Bernie Volz. Known TCP Implementation Problems, March 1999. RFC 2525.
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Vern Paxson, Mark Allman, Scott Dawson, William Fenner, Jim Griner, Ian Heavens, Kevin Lahey, Jeff Semke, and Bernie Volz. Known TCP Implementation Problems, March 1999. RFC 2525.
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Paxson, V., Allman, M., Dawson, S., Fenner, W., Griner, J., Heavens, I., Lahey, K., Semke, J. and B. Volz, "Known TCP Implementation Problems", RFC 2525, March 1999. Obtain via: http://www.rfceditor. org/rfc/rfc2525.txt
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Paxson, V., Allman, M., Dawson, S., Heavens, I. and B. Volz, "Known TCP Implementation Problems", RFC 2525, March 1999.
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Paxson, V., Allman, M., Dawson, S., Fenner, W., Griner, J., Heavens, I., Lahey, K., Semke, J. and B. Volz, "Known TCP Implementation Problems", RFC 2525, March 1999.
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Paxson, V., Allman, M., Dawson, S., Heavens, I. and B. Volz, "Known TCP Implementation Problems", RFC 2525, March 1999.
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Vern Paxson, Mark Allman, Scott Dawson, William Fenner, Jim Griner, Ian Heavens, Kevin Lahey, Jeff Semke, and Bernie Volz. Known TCP Implementation Problems, March 1999. RFC 2525.
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Vern Paxson, Mark Allman, Scott Dawson, William Fenner, Jim Griner, Ian Heavens, Kevin Lahey, Jeff Semke y Bernie Volz. Known TCP Implementation Problems, Marzo 1999. RFC 2525.
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V. Paxson, M. Allman, S. Dawson, W. Fenner, J. Griner, I. Heavens, K. Lahey, J. Semke, and B. Volz. Known TCP implementation problems. RFC 2525, Internet Engineering Task Force, Mar. 1999.
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Paxson, V., Allman, M., Dawson, S., Fenner, W., Griner, J., Heavens, I., Lahey, K., Semke, J., and B. Volz, "Known TCP Implementation Problems", RFC 2525, March 1999.
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V. Paxson, M. Allman, S. Dawson, W. Fenner, J. Griner, I. Heavens, K. Lahey, J. Semke, and B. Volz. Known TCP implementation problems. RFC 2525, Internet Engineering Task Force, Mar. 1999.
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Paxson, V., Allman, M., Dawson, S., Heavens, I. and B. Volz, "Known TCP Implementation Problems", RFC 2525, March 1999.
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Vern Paxson and et.al. Known TCP Implementation Problems. RFC 2525, March 1999.
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Paxson, V., Allman, M., Dawson, S., Heavens, I., and B. Volz, "Known TCP Implementation Problems", Work In Progress.
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Vern Paxson and et.al. Known TCP implementation problems. RFC 2525, March 1999.
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#V. Paxson (ed). Known TCP Implementation Problems. RFC2525, March 1999. http://www.ietf.org/rfc/rfc2525.txt.
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