Jump to content

This is the support site for Andrews & Arnold Ltd, a UK Internet provider. Information on these pages is generally for our customers but may be useful to others, enjoy!

Other Line Options: Difference between revisions

Content deleted Content added
CrazyTeeka (talk | contribs)
mNo edit summary
CrazyTeeka (talk | contribs)
Line 43: Line 43:
Forces an MTU regardless of what is negotiated by your router.
Forces an MTU regardless of what is negotiated by your router.


'''More Info:''' MTU is negotiated upon connection. We usually like 1500 MTU, however, there can be situations where forcing 1492 is required. For example, if your router negotiated 1500 initially but you make a connection to a server that want's to re-negigotiate a lower MTU it will try to do this using ICMP, but if your router has a miss-configured firewall that blocks ICMP this can't be re-negoiated and the connection to the server will have problems. This is seen when connecting to certain web sites, bank web sites and https sites. Forcing 1492 from the start means that all your traffic is in packets of 1492 bytes and so won't have this problem.
'''More Info:''' MTU is negotiated upon connection. We usually like 1500 MTU, however, there can be situations where forcing 1492 is required. For example, if your router negotiated 1500 initially but you make a connection to a server that want's to re-negotiate a lower MTU it will try to do this using ICMP, but if your router has a miss-configured firewall that blocks ICMP this can't be re-negotiated and the connection to the server will have problems. This is seen when connecting to certain web sites, bank web sites and https sites. Forcing 1492 from the start means that all your traffic is in packets of 1492 bytes and so won't have this problem.


=== TCPFix ===
=== TCPFix ===