Re: Question regarding MSS

2010-04-15 Thread Ted Unangst
On Thu, Apr 15, 2010 at 1:46 PM, Matthew Sullenberger wrote: > establish a connection. I don't have another host that doesn't send an MSS to > test with, nor am I really sure how I would go about producing one. So would > this be possibly a "bug" in the OpenBSD PMTU implementation (the expected >

Re: Question regarding MSS

2010-04-15 Thread Matthew Sullenberger
(sorry about the long "disclaimer" in my original email-- I didn't think about the fact that my company automatically appends that; I have signed up with a new account). Simon Perreault wrote: > Assuming you meant 536... > ...you're right according to RFC 879: Yes, I did indeed mean 536 not 576.

Re: Question regarding MSS

2010-04-15 Thread Simon Perreault
On 2010-04-15 13:46, Matthew Sullenberger wrote: So would this be possibly a "bug" in the OpenBSD PMTU implementation (the expected behavior occurs and the connection works normally if I disable PMTU) and if so should I be submitting some kind of official report? Maybe. Use sendbug(1). Simon -

Re: Question regarding MSS

2010-04-15 Thread Simon Perreault
On 2010-04-15 12:18, Matthew Sullenberger wrote: I understand the host I am trying to communicate with has its own set of issues, but my question to Misc is that I was under the belief that if either side did not explicitly send a MSS during the handshake the required behavior was to default to 5

Question regarding MSS

2010-04-15 Thread Matthew Sullenberger
Hello Misc, I am consistently having trouble sending data to one particular host. After quite a lot of troubleshooting and reviewing config on my side, I noticed that during the TCP handshake the host in question was not sending any MSS in its SYN/ACK packet. My OpenBSD box then continues to tran